CN113645016A - Signal processing system and method - Google Patents
Signal processing system and method Download PDFInfo
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- CN113645016A CN113645016A CN202110885089.4A CN202110885089A CN113645016A CN 113645016 A CN113645016 A CN 113645016A CN 202110885089 A CN202110885089 A CN 202110885089A CN 113645016 A CN113645016 A CN 113645016A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0042—Digital filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0067—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0096—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges where a full band is frequency converted into another full band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention discloses a signal processing system and a signal processing method. The system comprises a first signal amplification module, a first filtering module, an amplification and attenuation module, a frequency mixing module and an intermediate frequency filtering module, wherein: the first signal amplification module receives a signal to be detected and amplifies the signal to be detected to obtain an amplified signal to be detected; the first filtering module carries out filtering processing on the amplified signal to be tested to obtain a filtering signal to be tested; the amplification attenuation module performs amplification attenuation processing on the filtering signal to be tested to obtain an amplification attenuation signal to be tested; the frequency mixing module carries out frequency mixing processing on the amplified attenuation signal to be tested to obtain a frequency mixing signal to be tested; and the intermediate frequency filtering module performs intermediate frequency filtering processing on the mixing signal to be tested to obtain an intermediate frequency signal to be tested. The technical scheme of the embodiment of the invention can convert the high-frequency signal to be tested into the intermediate-frequency signal to be tested which can be used for testing under the condition of ensuring that the signal index meets the standard, thereby meeting the testing requirement of the signal to be tested.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a signal processing system and a signal processing method.
Background
The wireless communication technology is a communication method for exchanging information by using a characteristic that a wireless signal can freely propagate in space. With the rapid development of communication technology, the wireless communication technology is more and more mature, and has been applied to a plurality of information transmission fields to realize communication, thereby bringing great convenience to the life of people. The signal quality greatly influences the use experience of people, and therefore, the signal quality test is also important. However, the signal frequency cannot meet the test requirement of the device without any processing of the signal to be tested.
Disclosure of Invention
Embodiments of the present invention provide a signal processing system and method, which can convert a high-frequency signal to be tested into an intermediate-frequency signal to be tested, which can be used for testing, under the condition that it is ensured that signal indexes meet standards, so as to meet the test requirements of the signal to be tested.
In a first aspect, an embodiment of the present invention provides a signal processing system, including a first signal amplifying module, a first filtering module, an amplifying and attenuating module, a mixing module, and an intermediate frequency filtering module, where:
the output end of the first signal amplification module is electrically connected with the input end of the first filtering module and is used for receiving a signal to be detected and amplifying the signal to be detected to obtain an amplified signal to be detected;
the output end of the first filtering module is electrically connected with the input end of the amplification attenuation module and is used for filtering the amplified signal to be tested to obtain a filtered signal to be tested;
the output end of the amplification and attenuation module is electrically connected with the input end of the frequency mixing module and is used for performing amplification and attenuation processing on the filtering signal to be tested to obtain an amplification and attenuation signal to be tested;
the output end of the frequency mixing module is electrically connected with the input end of the intermediate frequency filtering module and is used for carrying out frequency mixing processing on the amplified attenuation signal to be tested to obtain a frequency mixing signal to be tested;
the intermediate frequency filtering module is used for carrying out intermediate frequency filtering processing on the to-be-tested mixing signal to obtain the to-be-tested intermediate frequency signal.
In a second aspect, an embodiment of the present invention further provides a signal processing method, applied to a signal processing system, including:
receiving a signal to be tested, and amplifying the signal to be tested to obtain an amplified signal to be tested;
filtering the amplified signal to be tested to obtain a filtered signal to be tested;
carrying out amplification attenuation processing on the filtering signal to be tested to obtain an amplification attenuation signal to be tested;
carrying out frequency mixing processing on the amplified attenuation signal to be tested to obtain a frequency mixing signal to be tested;
and performing intermediate frequency filtering processing on the to-be-tested mixing signal to obtain an intermediate frequency signal to be tested.
The embodiment of the invention forms a signal processing system by a first signal amplifying module, a first filtering module, an amplifying and attenuating module, a mixing module and an intermediate frequency filtering module, the system receives a signal to be tested by the first signal amplifying module, amplifies the signal to be tested to obtain an amplified signal to be tested, filters the amplified signal to be tested by the first filtering module to obtain a filtered signal to be tested, amplifies and attenuates the filtered signal to be tested by the amplifying and attenuating module to obtain an amplified and attenuated signal to be tested, further mixes the amplified and attenuated signal to be tested by the mixing module to obtain a mixed signal to be tested, and then performs intermediate frequency filtering on the mixed signal to be tested by the intermediate frequency filtering module to obtain an intermediate frequency signal to be tested, so that the problem that the existing signal is not processed, the problem that the test requirement cannot be met is solved, and the high-frequency signal to be tested can be converted into the intermediate-frequency signal to be tested under the condition that the signal index meets the standard, so that the test requirement of the signal to be tested is met.
Drawings
Fig. 1 is a schematic diagram of a signal processing system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a specific example of a signal processing system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another specific example of a signal processing system according to an embodiment of the present invention;
fig. 4 is a flowchart of a signal processing method according to a second embodiment of the present invention;
fig. 5 is a flowchart illustrating a specific example of a signal processing method according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
The terms "first" and "second," and the like in the description and claims of embodiments of the invention and in the drawings, are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
Example one
Fig. 1 is a schematic diagram of a signal processing system according to an embodiment of the present invention, the signal processing system including: a first signal amplifying module 10, a first filtering module 20, an amplification and attenuation module 30, a mixing module 40 and an intermediate frequency filtering module 50, wherein: the output end of the first signal amplification module 10 is electrically connected with the input end of the first filtering module 20, and is used for receiving a signal to be detected and amplifying the signal to be detected to obtain an amplified signal to be detected; the output end of the first filtering module 20 is electrically connected to the input end of the amplification and attenuation module 30, and is used for filtering the amplified signal to be tested to obtain a filtered signal to be tested; the output end of the amplification and attenuation module 30 is electrically connected with the input end of the frequency mixing module 40, and is used for performing amplification and attenuation processing on the filtering signal to be tested to obtain an amplification and attenuation signal to be tested; the output end of the frequency mixing module 40 is electrically connected with the input end of the intermediate frequency filtering module 50, and is used for performing frequency mixing processing on the amplified attenuation signal to be tested to obtain a frequency mixing signal to be tested; the intermediate frequency filtering module 50 is configured to perform intermediate frequency filtering processing on the to-be-tested mixing signal to obtain the to-be-tested intermediate frequency signal.
The first signal amplifying module 10 may be a module for amplifying a signal. The first filtering module 20 may be a module for performing a filtering process on the signal. The amplification and attenuation module 30 may be a module for performing amplification and attenuation processing on the signal. The mixing module 40 may be a module for performing mixing processing on the signal. The intermediate frequency filtering module 50 may be a module for performing intermediate frequency filtering processing on the signal. The signal to be tested may be the signal to be tested without signal processing. Optionally, the signal to be measured may be a high-frequency signal. The amplified signal to be tested may be a signal obtained by amplifying the signal to be tested. The filtered signal to be tested may be a signal obtained by filtering the amplified signal to be tested. The to-be-tested amplification and attenuation signal can be a signal obtained by performing amplification and attenuation processing on the to-be-tested filtering signal. The mixing signal to be tested can be a signal obtained by mixing the amplified and attenuated signal to be tested. The intermediate frequency signal to be tested may be a signal obtained by performing intermediate frequency filtering on the mixing signal to be tested.
In the embodiment of the present invention, the signal processing system is composed of a first signal amplifying module 10, a first filtering module 20, an amplifying and attenuating module 30, a frequency mixing module 40 and an intermediate frequency filtering module 50, where the first signal amplifying module 10 can receive a signal to be tested and amplify the signal to be tested to obtain an amplified signal to be tested, and thus the output end of the first signal amplifying module 10 outputs the amplified signal to be tested to the first filtering module 20 to further process the amplified signal to be tested. After the input end of the first filtering module 20 receives the amplified signal to be tested, the amplified signal to be tested may be further filtered to obtain a filtered signal to be tested, so that the output end of the first filtering module 20 outputs the filtered signal to be tested to the amplification and attenuation module 30 to further process the filtered signal to be tested. After the input end of the amplification and attenuation module 30 receives the filtering signal to be tested, the filtering signal to be tested may be further subjected to amplification and attenuation processing to obtain an amplification and attenuation signal to be tested, so that the output end of the amplification and attenuation module 30 outputs the amplification and attenuation signal to be tested to the frequency mixing module 40 to further process the amplification and attenuation signal to be tested. After the input end of the frequency mixing module 40 receives the amplified attenuation signal to be tested, the amplified attenuation signal to be tested may be further subjected to frequency mixing processing to obtain a frequency mixing signal to be tested, so that the output end of the frequency mixing module 40 outputs the frequency mixing signal to be tested to the intermediate frequency filtering module 50 to further process the frequency mixing signal to be tested. After the input end of the intermediate frequency filtering module 50 receives the mixing signal to be tested, the intermediate frequency filtering processing can be further performed on the mixing signal to be tested to obtain an intermediate frequency signal to be tested, so that the output end of the intermediate frequency filtering module 50 outputs the intermediate frequency signal to be tested to test the intermediate frequency signal to be tested.
Optionally, when the signal to be measured is only a signal with a frequency bandwidth, after the signal is amplified by the first signal amplification module, only one first filtering module is needed to perform filtering processing on the amplified signal.
Therefore, the signal processing system can convert the high-frequency signal to be tested into the intermediate-frequency signal to be tested, and can ensure that the signal index meets the standard, namely the index of the signal does not deteriorate, so that the test requirement of the signal to be tested is met.
In an alternative implementation manner of the embodiment of the present invention, fig. 2 is a schematic diagram of a specific example of a signal processing system according to an embodiment of the present invention, and as shown in fig. 2, the signal processing system may further include a first radio frequency switch module 60; the number of the first filtering modules 20 may be the same as the number of the switching paths of the first rf switching module 60; the input end of the first rf switch module 60 may be electrically connected to the first signal amplifying module 10, and the output end of the first rf switch module may be electrically connected to each of the first filtering modules 20, and may be configured to screen and filter the sub-signals of the amplified signal to be tested according to the signal testing requirement, so as to obtain the filtering signal to be tested.
The first rf switch module 60 may be configured to select a corresponding filtering module according to different frequency bands of the signal, for example, may be a multiple-to-one rf switch, which is not limited in the embodiment of the present invention. The sub-signals of the amplified signal to be tested may be amplified signals to be tested of different frequency bands.
In the embodiment of the invention, when the signal to be tested is a broadband signal, different sub-signals of multiple frequency bands in the broadband signal can be screened out through the first radio frequency switch module. Specifically, in the signal processing system, the number of the first filtering modules 20 is the same as the number of switching paths of the first rf switch module 60, that is, one first filtering module 20 is connected to an output end of each path of switch of the first rf switch module 60, so as to select the filtering module corresponding to the frequency band according to the different frequency bands of the amplified signal to be tested.
Specifically, after the output end of the first signal amplifying module 10 outputs the amplified signal to be tested, the input end of the first radio frequency switch module 60 may receive the amplified signal to be tested, and filter the amplified signal to be tested in different frequency bands according to the signal testing requirement, that is, select the corresponding switch branch of the first radio frequency switch module 60 according to the amplified signal to be tested in different frequency bands, so that the first filter module 20 corresponding to the frequency band of the amplified signal to be tested filters and filters the amplified signal to be tested, so as to obtain the filtered signal to be tested.
In an optional implementation of the embodiment of the present invention, the amplification and attenuation module 30 may include a power amplifier 310 with a digitally controlled attenuator; the power amplifier 310 with the numerical control attenuator can be used for performing amplification and attenuation processing on the filtering signal to be tested according to the configured attenuation and amplification parameters to obtain an amplification and attenuation signal to be tested.
The power amplifier 310 with the digitally controlled attenuator may be a power amplifier with an attenuator for automatically controlling signal attenuation, and may be used to amplify and attenuate the filtered signal to be tested. The attenuation amplification parameter may be a parameter of the signal attenuation amplification value. It is understood that the attenuation amplification parameters may be pre-configured according to a specific scenario to control the signal attenuation amplification value.
Alternatively, the amplification and attenuation module 30 may directly use the power amplifier 310 with a digitally controlled attenuator. Correspondingly, after the first filtering module 20 outputs the filtering signal to be tested, the input end of the power amplifier 310 with the numerical control attenuator of the amplification and attenuation module 30 may receive the filtering signal to be tested, and further perform amplification and attenuation processing on the filtering signal to be tested according to the preset attenuation and amplification parameters to obtain the amplification and attenuation signal to be tested.
In an alternative implementation manner of the embodiment of the present invention, fig. 3 is a schematic diagram of another specific example of a signal processing system provided in the first embodiment of the present invention, and as shown in fig. 3, the amplification and attenuation module 30 may include a programmable attenuation module 320 and a second signal amplification module 330; the input end of the programmable attenuation module 320 is electrically connected to the output end of the first filtering module 20, and is configured to attenuate the filtering signal to be tested according to the configured attenuation parameter to obtain an attenuated signal to be tested; the input end of the second signal amplifying module 330 is electrically connected to the output end of the attenuating module, and the output end is electrically connected to the input end of the frequency mixing module 40, and is configured to amplify the attenuation signal to be tested again, so as to obtain the amplification attenuation signal to be tested.
The programmable attenuation module 320 may be a programmable module for performing attenuation processing on the signal. The second signal amplifying module 330 may be another module for amplifying the signal. The attenuation parameter may be a parameter of signal attenuation. The attenuation signal to be tested can be a signal obtained by performing attenuation processing on the filtering signal to be tested.
Optionally, the amplification and attenuation module 30 may also be formed by a programmable attenuation module 320 and a second signal amplification module 330. Correspondingly, after the first filtering module 20 outputs the filtering signal to be tested, the input end of the programmable attenuation module 320 of the amplification attenuation module 30 may receive the filtering signal to be tested, and further perform attenuation processing on the filtering signal to be tested according to the configured attenuation parameter to obtain the attenuation signal to be tested, so that the output end of the programmable attenuation module 320 may send the attenuation signal to be tested to the input end of the second signal amplification module 330, and after the input end of the second signal amplification module 330 receives the attenuation signal to be tested, the attenuation signal to be tested is amplified again to obtain the amplification attenuation signal to be tested, so that the amplification attenuation signal to be tested is output to the frequency mixing module 40.
In an optional implementation manner of the embodiment of the present invention, the signal processing system may further include a second radio frequency switch module 70, and the frequency mixing module 40 may include a low-band frequency mixing module 410, a high-band frequency mixing module 430, and a local oscillation module 420; the input end of the second radio frequency switch module 70 is electrically connected to the output end of the amplification and attenuation module 30, and the output end is electrically connected to the input end of the low-frequency band mixing module 410 and the input end of the high-frequency band mixing module 430, and is configured to perform shunt processing on the amplification and attenuation signal to be tested, so as to obtain a first path of signal to be tested and a second path of signal to be tested; the input end of the low-frequency band mixing module 410 is electrically connected to the output end of the second radio frequency switch module 70 and the output end of the local oscillation module 420, and the output end is electrically connected to the input end of the intermediate frequency filter module 50, and is configured to perform low-frequency mixing processing on the first path of signal to be measured according to the local oscillation signal to obtain a low-frequency signal to be measured; the input end of the high-frequency band mixing module 430 is electrically connected to the output end of the second radio frequency switch module 70 and the output end of the local oscillation module 420, and the output end is electrically connected to the input end of the intermediate frequency filtering module 50, and is configured to perform low-frequency mixing processing on the second channel of signal to be measured according to the local oscillation signal to obtain a high-frequency signal to be measured; the intermediate frequency filtering module 50 is configured to perform intermediate frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested, so as to obtain an intermediate frequency signal to be tested.
The second rf switch module 70 may be configured to select a corresponding module according to different frequency bands of the signal, for example, it may be an alternative rf switch, which is not limited in the embodiment of the present invention. The low band mixing module 410 may be a module for performing mixing processing on the low band signal. The high band mixing module 430 may be a module for performing mixing processing on the high band signal. The local oscillation module 420 may be a module for generating a local oscillation signal, and optionally, when the signal to be measured is a broadband signal, the local oscillation module 420 may generate the broadband local oscillation signal. The first path of signal to be measured may be a signal to be measured obtained after the signal to be measured is subjected to shunt processing by the second rf switch module 70. The second path of signal to be measured may be another signal to be measured obtained after the second rf switch module 70 performs the shunting processing. The local oscillation signal may be a signal sent by the local oscillation module 420, and is used to perform frequency mixing processing on the signal. For example, if the signal to be measured is a 5G signal, the local oscillator signal may be a wideband local oscillator signal, that is, the local oscillator signal may be a signal of 700M-6G. If the signal to be measured is a 4G signal, the local oscillator signal may be a signal of 800M to 2700M. The embodiments of the present invention do not limit this. The low-frequency signal to be measured can be a signal obtained after low-frequency mixing processing. The high-frequency signal to be measured may be a signal obtained by high-frequency mixing processing.
Optionally, when the signal to be detected is a broadband signal, the signal may be further subjected to shunt processing by the second radio frequency switch module. Correspondingly, when the frequency mixing processing is performed on the amplified and attenuated signal to be tested, after the amplified and attenuated signal to be tested is received at the input end of the second radio frequency switch module 70, the amplified and attenuated signal to be tested is further subjected to shunt processing to obtain a first path of signal to be tested and a second path of signal to be tested.
Optionally, the frequency mixing module 40 may be formed by a low-band frequency mixing module 410, a high-band frequency mixing module 430, and a local oscillation module 420. Correspondingly, the output end of the second rf switch module 70 outputs the first path of signal to be tested to the input end of the low-band frequency mixing module 410, and outputs the second path of signal to be tested to the input end of the high-band frequency mixing module 430. After receiving the local oscillation signal and the first channel of signal to be detected sent by the local oscillation module 420, the input end of the low-frequency band frequency mixing module 410 further performs low-frequency mixing processing on the first channel of signal to be detected according to the local oscillation signal to obtain a low-frequency signal to be detected, so that the output end of the low-frequency band frequency mixing module 410 outputs the low-frequency signal to be detected to the intermediate-frequency filtering module 50. After receiving the local oscillator signal and the second channel of signal to be measured sent by the local oscillator module 420, the input end of the high-band frequency mixing module 430 further performs high-frequency mixing processing on the second channel of signal to be measured according to the local oscillator signal to obtain a high-frequency signal to be measured, so that the output end of the high-band frequency mixing module 430 outputs the high-frequency signal to be measured to the intermediate-frequency filtering module 50. After receiving the low-frequency signal to be tested and the high-frequency signal to be tested, the input end of the intermediate frequency filtering module 50 may further perform intermediate frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested to obtain an intermediate frequency signal to be tested.
In an optional implementation manner of the embodiment of the present invention, the signal processing system may further include a third signal amplifying module 80; the input end of the third signal amplifying module 80 is electrically connected to the output end of the intermediate frequency filtering module 50, and the output end is electrically connected to an AD (analog-to-digital conversion) processing module 90, and is configured to amplify the intermediate frequency signal to be tested, so as to obtain a target signal to be tested.
The third signal amplifying module 80 may be another module for amplifying the signal. The AD processing module 90 may be a module for performing analog-to-digital conversion processing on the signal.
Optionally, the third signal amplification module may amplify the intermediate frequency signal to be tested again, so as to test the signal to be tested. Correspondingly, after the intermediate frequency filter module 50 outputs the intermediate frequency signal to be tested, the input end of the third signal amplification module 80 may receive the intermediate frequency signal to be tested, and further amplify the intermediate frequency signal to be tested to obtain the target signal to be tested, so that the output end of the third signal amplification module 80 outputs the target signal to be tested to the AD processing module 90, and further, the target signal to be tested may be tested through the AD processing module 90.
In an optional implementation manner of the embodiment of the present invention, the first signal amplifying module 10 may include a low noise amplifying module 110; the low-noise amplifier module 110 may be configured to receive a signal to be detected sent by an antenna, and amplify the signal to be detected.
The low-noise amplifier module 110 may be configured to amplify the signal received from the antenna, so that the electronic device at the subsequent stage further processes the signal. It can be understood that the signal from the antenna is generally very weak, and needs to be further processed after signal amplification, and the low noise amplifier module 110 is generally located near the antenna to reduce the loss of the signal due to transmission.
Optionally, when the signal to be detected is a signal from an antenna, the low-noise amplification module 110 may be used as the first signal amplification module 10 of the signal processing system. Accordingly, the low-noise amplifier module 110 of the signal processing system may receive the signal to be detected sent by the antenna, and amplify the signal to be detected.
In an optional implementation of the embodiment of the present invention, the signal to be tested may include at least one of a 4G signal and a 5G signal.
Specifically, the signal to be measured may be a 4G (fourth generation mobile communication technology) signal, may also be a 5G (fifth generation mobile communication technology) signal, or may also be a 4G and 5G signal, which is not limited in this embodiment of the present invention.
It should be noted that many signal testing devices can only test 4G signals, and the frequency band of the signals transmitted by the 4G base station is 800-. While the frequency band of the 5G signal is wider and higher. The definitions of the 3GPP (third generation partnership project) for the 5G frequency band range are FR1 and FR 2. The frequency range FR1 is usually the 5G Sub-6GHz (below 6 GHz) band, and the frequency range FR2 is the 5G millimeter wave band. The existing outdoor base stations are basically in the FR1 frequency band. Therefore, the test frequency band of many existing signal test devices needs to be expanded from 800-.
In the embodiment of the invention, the first radio frequency switch module is arranged in the signal processing system, so that different sub-signals of various frequency bands can be screened out from the broadband signal through the first radio frequency switch module, the sub-signals are further processed, the broadband signal is further processed, and the processed broadband signal meets the test requirement.
The technical scheme of this embodiment is that a signal processing system is formed by a first signal amplifying module, a first filtering module, an amplifying and attenuating module, a mixing module and an intermediate frequency filtering module, the system receives a signal to be tested through the first signal amplifying module, amplifies the signal to be tested to obtain an amplified signal to be tested, filters the amplified signal to be tested by the first filtering module to obtain a filtered signal to be tested, amplifies and attenuates the filtered signal to be tested by the amplifying and attenuating module to obtain an amplified and attenuated signal to be tested, further mixes the amplified and attenuated signal to be tested by the mixing module to obtain a mixed signal to be tested, and then performs intermediate frequency filtering on the mixed signal to be tested by the intermediate frequency filtering module to obtain an intermediate frequency signal to be tested, so that the problem that the existing signal is not processed, the problem that the test requirement cannot be met is solved, and the high-frequency signal to be tested can be converted into the intermediate-frequency signal to be tested under the condition that the signal index meets the standard, so that the test requirement of the signal to be tested is met.
Example two
Fig. 4 is a flowchart of a signal processing method according to a second embodiment of the present invention, where this embodiment is applicable to a case where a signal to be tested is processed, and the method may be executed by a signal processing system, and the system may be implemented by software/hardware. The signal processing system comprises a first signal amplification module, a first filtering module, an amplification and attenuation module, a frequency mixing module and an intermediate frequency filtering module. Accordingly, as shown in fig. 4, the method comprises the steps of:
s410, receiving a signal to be tested, and amplifying the signal to be tested to obtain an amplified signal to be tested.
In the embodiment of the present invention, the first signal amplification module may receive a signal to be tested, and amplify the signal to be tested to obtain an amplified signal to be tested, so that the output end of the first signal amplification module outputs the amplified signal to be tested to the first filtering module to further process the amplified signal to be tested.
Optionally, receiving a signal to be detected and amplifying the signal to be detected, which may further include: and receiving a signal to be detected sent by an antenna, and amplifying the signal to be detected.
Specifically, a low-noise amplification module in a first signal amplification module of the signal processing system receives a signal to be detected sent by an antenna, and amplifies the signal to be detected.
Optionally, the signal to be measured may include at least one of a 4G signal and a 5G signal.
Specifically, the signal to be measured may be a 4G signal, a 5G signal, or a 4G and 5G signal, which is not limited in this embodiment of the present invention.
And S420, filtering the amplified signal to be tested to obtain a filtered signal to be tested.
In the embodiment of the present invention, after the input end of the first filtering module receives the amplified signal to be tested, the amplified signal to be tested may be further filtered to obtain a filtered signal to be tested, so that the output end of the first filtering module outputs the filtered signal to be tested to the amplification and attenuation module to further process the filtered signal to be tested.
Optionally, the filtering processing on the amplified signal to be tested may include: and screening and filtering the sub-signals of the amplified signal to be tested according to the signal test requirement to obtain the filtered signal to be tested.
Specifically, after the output end of the first signal amplification module outputs the amplified signal to be tested, the input end of the first radio frequency switch module may receive the amplified signal to be tested, and filter and process the amplified signals to be tested in different frequency bands according to the signal test requirement, that is, select the switch branch of the corresponding first radio frequency switch module according to the amplified signals to be tested in different frequency bands, so that the first filter module corresponding to the frequency band of the amplified signal to be tested filters and processes the amplified signal to be tested, and obtains the filtered signal to be tested.
And S430, performing amplification attenuation processing on the filtering signal to be tested to obtain an amplification attenuation signal to be tested.
In the embodiment of the invention, after the input end of the amplification and attenuation module receives the filtering signal to be tested, the amplification and attenuation processing can be further performed on the filtering signal to be tested to obtain the amplification and attenuation signal to be tested, so that the output end of the amplification and attenuation module outputs the amplification and attenuation signal to be tested to the frequency mixing module to further process the amplification and attenuation signal to be tested.
Optionally, the performing amplification and attenuation processing on the filtered signal to be tested may include: and carrying out amplification attenuation processing on the filtering signal to be tested according to the configured attenuation amplification parameters to obtain the amplification attenuation signal to be tested.
Specifically, after the first filtering module outputs the filtering signal to be tested, the input end of the power amplifier with the numerical control attenuator of the amplification and attenuation module may receive the filtering signal to be tested, and further, the filtering signal to be tested is subjected to amplification and attenuation processing according to the preset attenuation and amplification parameters, so as to obtain the amplification and attenuation signal to be tested.
Optionally, the performing amplification and attenuation processing on the filtered signal to be tested may include: carrying out attenuation processing on the filtering signal to be tested according to the configured attenuation parameters to obtain an attenuation signal to be tested; and amplifying the attenuation signal to be tested again to obtain the amplification attenuation signal to be tested.
Specifically, after the first filtering module outputs the filtering signal to be tested, the input end of the programmable attenuation module of the amplification attenuation module can receive the filtering signal to be tested, and further, the filtering signal to be tested is attenuated according to the configured attenuation parameter to obtain the attenuation signal to be tested, so that the output end of the programmable attenuation module can send the attenuation signal to be tested to the input end of the second signal amplification module, after the input end of the second signal amplification module receives the attenuation signal to be tested, the attenuation signal to be tested is amplified again to obtain the amplification attenuation signal to be tested, and the amplification attenuation signal to be tested is output to the frequency mixing module.
S440, performing frequency mixing processing on the amplified attenuation signal to be tested to obtain a frequency mixing signal to be tested.
In the embodiment of the present invention, after the input end of the frequency mixing module receives the amplified and attenuated signal to be tested, the amplified and attenuated signal to be tested may be further subjected to frequency mixing processing to obtain a frequency mixing signal to be tested, so that the output end of the frequency mixing module outputs the frequency mixing signal to be tested to the intermediate frequency filtering module to further process the frequency mixing signal to be tested.
S450, performing intermediate frequency filtering processing on the to-be-tested mixing signal to obtain the to-be-tested intermediate frequency signal.
In the embodiment of the present invention, after the input end of the intermediate frequency filtering module receives the mixing signal to be tested, the intermediate frequency filtering module may further perform intermediate frequency filtering processing on the mixing signal to be tested to obtain the intermediate frequency signal to be tested, so that the output end of the intermediate frequency filtering module outputs the intermediate frequency signal to be tested to test the intermediate frequency signal to be tested.
Optionally, the mixing processing of the amplified and attenuated signal to be tested may include: carrying out shunt processing on the amplified attenuation signal to be tested to obtain a first path of signal to be tested and a second path of signal to be tested; carrying out low-frequency mixing processing on the first path of signal to be detected according to the local oscillator signal to obtain a low-frequency signal to be detected; and carrying out low-frequency mixing processing on the second channel of signals to be detected according to the local oscillator signal to obtain high-frequency signals to be detected. The intermediate frequency filtering processing is performed on the mixing signal to be tested, and may include: and performing intermediate frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested to obtain the intermediate frequency signal to be tested.
Specifically, when the amplified and attenuated signal to be tested is subjected to frequency mixing processing, after the amplified and attenuated signal to be tested is received at the input end of the second radio frequency switch module, the amplified and attenuated signal to be tested is further subjected to shunt processing to obtain a first path of signal to be tested and a second path of signal to be tested, so that the output end of the second radio frequency switch module outputs the first path of signal to be tested to the input end of the low-frequency band frequency mixing module, and outputs the second path of signal to be tested to the input end of the high-frequency band frequency mixing module. The input end of the low-frequency band frequency mixing module receives the local oscillation signal and the first path of signal to be detected sent by the local oscillation module, and then the first path of signal to be detected is subjected to low-frequency mixing according to the local oscillation signal so as to obtain a low-frequency signal to be detected, and the output end of the low-frequency band frequency mixing module outputs the low-frequency signal to be detected to the intermediate frequency filtering module. The input end of the high-frequency band frequency mixing module receives the local oscillator signal and the second channel of signal to be measured sent by the local oscillator module, and then the high-frequency mixing processing is further carried out on the second channel of signal to be measured according to the local oscillator signal so as to obtain a high-frequency signal to be measured, and therefore the output end of the high-frequency band frequency mixing module outputs the high-frequency signal to be measured to the intermediate-frequency filtering module. After receiving the low-frequency signal to be detected and the high-frequency signal to be detected, the input end of the intermediate frequency filtering module can further perform intermediate frequency filtering processing on the low-frequency signal to be detected and the high-frequency signal to be detected so as to obtain an intermediate frequency signal to be detected.
Optionally, the signal processing method may further include: and amplifying the intermediate frequency signal to be tested to obtain a target signal to be tested.
Specifically, after the intermediate frequency filter module outputs the intermediate frequency signal to be tested, the input end of the third signal amplification module can receive the intermediate frequency signal to be tested, and further amplify the intermediate frequency signal to be tested to obtain a target signal to be tested, so that the output end of the third signal amplification module outputs the target signal to be tested to the AD processing module, and the target signal to be tested can be tested.
In order to make those skilled in the art better understand the signal processing method of the present embodiment, a specific example is used for description below, fig. 5 is a flowchart of a specific example of a signal processing method provided in a second embodiment of the present invention, and as shown in fig. 5, a specific process includes:
the antenna receives a radio frequency signal (with the frequency of F1), the radio frequency signal is amplified by the first signal amplification module, the first filtering module can be a band-pass filter and can suppress at least more than 40dB of out-of-band useless signals by using the first radio frequency switch module and the first filtering module, the out-of-band useless signals are suppressed and then input into the frequency mixing module, a local oscillation signal with the frequency of F2 is input into the frequency mixing module, and the two different frequency mixing modules work at a high frequency part and a low frequency part respectively, namely the low-frequency band frequency mixing module and the high-frequency band frequency mixing module. The frequency mixing module outputs intermediate frequency signals (F1-F2), and the signals are output to the AD processing module after passing through the intermediate frequency filtering module and the third signal amplifying module, so that the whole processing flow of converting the high frequency signals into the intermediate frequency signals is completed.
The technical scheme of this embodiment includes receiving a signal to be tested through a first signal amplification module, amplifying the signal to be tested to obtain an amplified signal to be tested, filtering the amplified signal to be tested through a first filtering module to obtain a filtered signal to be tested, amplifying and attenuating the filtered signal to be tested through an amplifying and attenuating module to obtain an amplified and attenuated signal to be tested, further mixing the amplified and attenuated signal to be tested through a mixing module to obtain a mixed signal to be tested, and then performing intermediate frequency filtering on the mixed signal to be tested through an intermediate frequency filtering module to obtain an intermediate frequency signal to be tested, so as to solve the problem that the existing signal cannot meet the test requirement without any processing, convert the high-frequency signal to be tested into the intermediate-frequency signal to be tested which can be used for testing under the condition that the signal index meets the standard, thereby meeting the test requirements of the signals to be tested.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A signal processing system, comprising a first signal amplification module, a first filtering module, an amplification and attenuation module, a mixing module, and an intermediate frequency filtering module, wherein:
the output end of the first signal amplification module is electrically connected with the input end of the first filtering module and is used for receiving a signal to be detected and amplifying the signal to be detected to obtain an amplified signal to be detected;
the output end of the first filtering module is electrically connected with the input end of the amplification attenuation module and is used for filtering the amplified signal to be tested to obtain a filtered signal to be tested;
the output end of the amplification and attenuation module is electrically connected with the input end of the frequency mixing module and is used for performing amplification and attenuation processing on the filtering signal to be tested to obtain an amplification and attenuation signal to be tested;
the output end of the frequency mixing module is electrically connected with the input end of the intermediate frequency filtering module and is used for carrying out frequency mixing processing on the amplified attenuation signal to be tested to obtain a frequency mixing signal to be tested;
the intermediate frequency filtering module is used for carrying out intermediate frequency filtering processing on the to-be-tested mixing signal to obtain the to-be-tested intermediate frequency signal.
2. The system of claim 1, further comprising a first radio frequency switch module; the number of the first filtering modules is the same as the number of switching paths of the first radio frequency switch module;
the input end of the first radio frequency switch module is electrically connected with the first signal amplification module, and the output end of the first radio frequency switch module is electrically connected with each first filtering module, and the first radio frequency switch module is used for screening and filtering sub-signals of the amplified signals to be tested according to signal testing requirements to obtain the filtered signals to be tested.
3. The system of claim 1, wherein the amplification attenuation module comprises a power amplifier with a digitally controlled attenuator;
the power amplifier with the numerical control attenuator is used for amplifying and attenuating the filtering signal to be tested according to the configured attenuation amplification parameters to obtain the amplified and attenuated signal to be tested.
4. The system of claim 1, wherein the amplification attenuation module comprises a programmable attenuation module and a second signal amplification module;
the input end of the programmable attenuation module is electrically connected with the output end of the first filtering module and is used for attenuating the filtering signal to be tested according to the configured attenuation parameter to obtain an attenuation signal to be tested;
the input end of the second signal amplification module is electrically connected with the output end of the attenuation module, and the output end of the second signal amplification module is electrically connected with the input end of the frequency mixing module, and the second signal amplification module is used for amplifying the attenuation signal to be tested again to obtain the amplification attenuation signal to be tested.
5. The system of claim 1, further comprising a second radio frequency switching module, the mixing module comprising a low band mixing module, a high band mixing module, and a local oscillator module;
the input end of the second radio frequency switch module is electrically connected with the output end of the amplification attenuation module, the output end of the second radio frequency switch module is electrically connected with the input end of the low-frequency band frequency mixing module and the input end of the high-frequency band frequency mixing module, and the second radio frequency switch module is used for shunting the amplification attenuation signal to be tested to obtain a first path of signal to be tested and a second path of signal to be tested;
the input end of the low-frequency band frequency mixing module is electrically connected with the output end of the second radio frequency switch module and the output end of the local oscillator module, and the output end of the low-frequency band frequency mixing module is electrically connected with the input end of the intermediate frequency filtering module and is used for carrying out low-frequency mixing processing on the first path of signal to be detected according to the local oscillator signal to obtain a low-frequency signal to be detected;
the input end of the high-frequency band frequency mixing module is electrically connected with the output end of the second radio frequency switch module and the output end of the local oscillator module, and the output end of the high-frequency band frequency mixing module is electrically connected with the input end of the intermediate frequency filtering module and is used for carrying out low-frequency mixing processing on the second path of signals to be detected according to the local oscillator signals to obtain high-frequency signals to be detected;
the intermediate frequency filtering module is used for carrying out intermediate frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested to obtain the intermediate frequency signal to be tested.
6. The system of any of claims 1-5, further comprising a third signal amplification module;
the input end of the third signal amplification module is electrically connected with the output end of the intermediate frequency filtering module, and the output end of the third signal amplification module is electrically connected with the AD processing module and is used for amplifying the intermediate frequency signal to be tested to obtain a target signal to be tested.
7. The system of claim 6, wherein the first signal amplification module comprises a low noise amplification module;
the low-noise amplification module is used for receiving a signal to be detected sent by an antenna and amplifying the signal to be detected.
8. The system of claim 7, wherein the signal under test comprises at least one of a 4G signal and a 5G signal.
9. A signal processing method applied to a signal processing system, comprising:
receiving a signal to be tested, and amplifying the signal to be tested to obtain an amplified signal to be tested;
filtering the amplified signal to be tested to obtain a filtered signal to be tested;
carrying out amplification attenuation processing on the filtering signal to be tested to obtain an amplification attenuation signal to be tested;
carrying out frequency mixing processing on the amplified attenuation signal to be tested to obtain a frequency mixing signal to be tested;
and performing intermediate frequency filtering processing on the to-be-tested mixing signal to obtain an intermediate frequency signal to be tested.
10. The method of claim 9, wherein the filtering the amplified signal under test comprises:
and screening and filtering the sub-signals of the amplified signal to be tested according to the signal test requirement to obtain the filtered signal to be tested.
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| WO2023011288A1 (en) * | 2021-08-03 | 2023-02-09 | 北京锐安科技有限公司 | Signal processing system and method |
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