CN103442461B - Electrically tunable antenna modulation-demodulation communication system - Google Patents
Electrically tunable antenna modulation-demodulation communication system Download PDFInfo
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- CN103442461B CN103442461B CN201310385733.7A CN201310385733A CN103442461B CN 103442461 B CN103442461 B CN 103442461B CN 201310385733 A CN201310385733 A CN 201310385733A CN 103442461 B CN103442461 B CN 103442461B
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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 invention discloses an electric tilt antenna modulation and demodulation communication system which comprises a plurality of electric tilt antenna modulation and demodulation control devices, wherein the electric tilt antenna modulation and demodulation control devices are connected through coaxial antenna feeder cables, each electric tilt antenna modulation and demodulation control device comprises a composite signal control circuit and a coaxial signal transmission connection cavity assembly, and the composite signal control circuit is connected with the coaxial signal transmission connection cavity assembly to realize bidirectional data transmission. The invention can realize effective composition of direct current power supply signals, electrically-tunable antenna control signals and electrically-tunable antenna radio frequency signals, the radio frequency spectrum bandwidth is 645 MHz-2700 MHz, the invention is compatible with the existing 2G and 3G mobile communication spectrum resources, the construction cost of the mobile communication base station is really reduced, and the control reliability of the electrically-tunable antenna of the mobile communication base station is improved.
Description
Technical Field
The invention relates to an electrically-tunable antenna modulation-demodulation communication system, belonging to the technical field of communication transmission and control.
Background
At present, with the development of data communication and multimedia service demands with the change of mobile communication technology, mobile communication technology starts to rise towards the fourth generation mobile communication technology (4G) in order to better meet the requirements of mobile data service, mobile computing and mobile multimedia service. While none of the developments and replacements of the prior art can be realized and completed overnight, from the first generation analog communication technologies to the second generation digital mobile communications: (2G) technologies GSM, GPRS, to third generation mobile communication (3G): WCDMA, CDMA2000, TD-SCDMA, and further to next generation mobile communication technologies: WiMAX, LTE, need to evolve continuously, and these technologies may exist simultaneously. In view of the technical features of the mobile communication network, in order to provide clear and smooth voice and high-speed and reliable data service and multimedia service to users, operators need to provide network services that optimize the communication network in real time and adjust the network dynamically to reduce the breathing effect caused by the dynamic flow of diverse services, and at the same time, reduce the generation of mutual interference. Therefore, the electrically-tuned mobile antenna is widely applied to the construction of mobile communication networks due to the advantages of improving the system capacity and resisting disturbance, and the convenience of dynamic adjustment of the communication networks and the saving of labor cost.
The existing mobile communication base station antenna system transmits radio frequency signals through an independent feeder cable, and another cable independently transmits remote electric adjusting mobile antenna control signals, so that the same electric adjusting antenna system needs two cables, namely the feeder cable and the control cable, to control signals and transmit radio frequency of the antenna system when a base station is built, the construction cost of the mobile communication system is increased, the construction cost and the maintenance difficulty are increased, and certain potential safety hazards exist.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide an electric tilt antenna modulation and demodulation communication system which can realize the effective composition of a direct current power supply signal, an electric tilt antenna control signal and an electric tilt antenna radio frequency signal, is compatible with the existing 2G and 3G mobile communication frequency spectrum resources, really reduces the construction cost of a mobile communication base station and improves the control reliability of the electric tilt antenna of the mobile communication base station.
The technical scheme adopted by the invention for solving the technical problems is as follows: an electric tilt antenna modulation and demodulation communication system comprises a plurality of electric tilt antenna modulation and demodulation control devices which are connected through a coaxial antenna feeder cable, wherein each electric tilt antenna modulation and demodulation control device comprises a composite signal control circuit and a coaxial signal transmission connection cavity assembly, and the composite signal control circuit is connected with the coaxial signal transmission connection cavity assembly to realize data bidirectional transmission; the composite signal control circuit is used for receiving the control signal of the electrically-adjustable antenna, modulating and filtering the control signal, receiving the direct-current power supply signal and compositing the control signal of the electrically-adjustable antenna into a low-frequency composite signal; the coaxial signal transmission connection cavity assembly is used for receiving radio frequency signals of the electrically-tuned antenna and receiving low-frequency composite signals transmitted by the composite signal control circuit, and compounding the radio frequency signals and the low-frequency composite signals into radio frequency composite signals which are transmitted to the coaxial antenna feeder cable; the coaxial signal transmission connection cavity assembly is also used for receiving the radio frequency composite signal transmitted by the coaxial antenna feeder cable, separating the radio frequency composite signal out of the radio frequency composite signal of the electrically tunable antenna, outputting the radio frequency composite signal out of the radio frequency composite signal, and transmitting the low frequency composite signal to the composite signal control circuit; the composite signal control circuit is also used for separating the low-frequency composite signal into a direct-current power supply signal, then processing and outputting the direct-current power supply signal, separating a radio-frequency signal of the electrically-tunable antenna, filtering and demodulating the radio-frequency signal, and then outputting the radio-frequency signal.
Furthermore, the composite signal control circuit comprises a signal transceiving control circuit, a narrow band-pass filter network circuit, a signal input/output control circuit, a modulation/demodulation control circuit and a power transmission control circuit for processing a direct-current power signal, wherein the signal input/output control circuit is respectively connected with the power transmission control circuit, the narrow band-pass filter network circuit and the coaxial signal transmission connection cavity assembly to realize data bidirectional transmission, the modulation/demodulation control circuit is connected with the narrow band-pass filter network circuit to realize data bidirectional transmission, and a control signal output end of the signal transceiving control circuit is respectively connected with the modulation/demodulation control circuit, the narrow band-pass filter network circuit and the signal input/output control circuit; the modulation and demodulation control circuit is used for modulating and demodulating the control signal of the electric tilt antenna according to the corresponding control command of the signal transceiving control circuit; the narrow band-pass filter network circuit is used for filtering the control signal of the electric tilt antenna according to the corresponding control command of the signal transceiving control circuit; the signal input and output control circuit is used for receiving the direct-current power supply signal processed by the power supply transmission control circuit and receiving the modulated and filtered electrically-regulated antenna control signal according to the corresponding control command of the signal transceiving control circuit, compounding the direct-current power supply signal and the modulated and filtered electrically-regulated antenna control signal into a low-frequency composite signal and transmitting the low-frequency composite signal to the coaxial signal transmission connection cavity assembly; the signal input and output control circuit is also used for receiving the low-frequency composite signal transmitted by the coaxial signal transmission connection cavity assembly according to the corresponding control command of the signal transceiving control circuit, separating out a direct-current power supply signal and transmitting the direct-current power supply signal to the power supply transmission control circuit, and separating out an unmodulated electrically-tunable antenna control signal and transmitting the unmodulated electrically-tunable antenna control signal to the narrow-band-pass filter network circuit.
Further, the coaxial signal transmission connection cavity assembly comprises a radio frequency composite signal connecting piece, a transmission cavity component, a transmission coaxial component and an electric tilt antenna radio frequency signal connecting piece used for receiving and outputting radio frequency signals of the electric tilt antenna, the radio frequency composite signal connecting piece is connected with the coaxial antenna feeder cable, and the radio frequency composite signal connecting piece and the electric tilt antenna radio frequency signal connecting piece are connected to the transmission cavity component and the transmission coaxial component.
Furthermore, the coaxial signal transmission connection cavity assembly supports a transmission radio frequency spectrum bandwidth of 645 MHz-2700 MHz, and is compatible with existing 2G and 3G mobile communication spectrum and next generation 4G-LTE communication spectrum resources.
After the technical scheme is adopted, the modulation and demodulation control circuit automatically adjusts and modulates the control signal AISG data according to the number rate of the detected electric-tuning antenna control signal AISG data under the control of the signal transceiving control circuit, and then the signal is processed by a narrow band-pass filter network circuit with the bandwidth of 120KHz (central frequency of 2.176 MHz) and is sent to the signal input and output control circuit; after the direct current power supply signal is processed by the power supply transmission control circuit, low-frequency signal compounding is carried out in the signal input and output control circuit, then radio-frequency signal compounding is carried out on the radio-frequency signal of the electrically-tuned antenna through the transmission cavity member and the transmission coaxial member, and the radio-frequency signal is transmitted to the single coaxial antenna feeder cable through the radio-frequency compound signal connecting piece, so that signal compounding operation is completed. Similarly, the radio frequency composite signal is introduced by the radio frequency composite signal connecting piece, the radio frequency signal and the low frequency composite signal of the electric tilt antenna are separated by the transmission cavity component and the transmission coaxial component, the radio frequency signal of the electric tilt antenna is output by the radio frequency signal connecting piece of the electric tilt antenna, the low frequency composite signal is separated into the direct current power supply signal and the control signal of the unmodulated electric tilt antenna under the control action of the signal transceiving control circuit by the signal transceiving control circuit, the control signal of the unmodulated electric tilt antenna is filtered by the narrow band pass filter network circuit, the transmitted electric tilt antenna control signal is demodulated under the control action of the signal transceiving control circuit to complete the composite reverse operation of the signals, and the transparent transmission of the control signal CF of the electric tilt antenna, the direct current power supply signal DC and the radio frequency signal RF of the antenna is realized, so that the compatibility of the LTE radio frequency spectrum and the GSM/WCDMA/CDMA 200/TD-SCDMA radio frequency spectrum in the next (ii) a On the other hand, the construction cost and the construction difficulty of the electrically tunable antenna are reduced, the expandability of the antenna system control is improved, the use is safe and quick, the working performance is stable and reliable, and the remote monitoring and control system is suitable for remote monitoring and control occasions of various mobile antennas in communication.
Drawings
Fig. 1 is a schematic structural diagram of an electrical tilt antenna modulation and demodulation communication system of the present invention;
fig. 2 is a schematic structural block diagram of the modulation and demodulation control device of the electrically tunable antenna of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1, an electrical tilt antenna modem communication system includes a plurality of electrical tilt antenna modem control devices connected by a coaxial antenna feeder cable, each electrical tilt antenna modem control device includes a composite signal control circuit and a coaxial signal transmission connection cavity assembly, and the composite signal control circuit is connected with the coaxial signal transmission connection cavity assembly to implement bidirectional data transmission; wherein,
the composite signal control circuit is used for receiving the control signal of the electrically-tunable antenna, modulating and filtering the control signal, receiving the direct-current power supply signal and compounding the control signal of the electrically-tunable antenna into a low-frequency composite signal;
the coaxial signal transmission connection cavity assembly is used for receiving radio frequency signals of the electrically tunable antenna and receiving low-frequency composite signals transmitted by the composite signal control circuit, and compounding the radio frequency signals and the low-frequency composite signals into radio frequency composite signals which are transmitted to the coaxial antenna feeder cable;
the coaxial signal transmission connection cavity assembly is also used for receiving the radio frequency composite signal transmitted by the coaxial antenna feeder cable, separating the radio frequency composite signal out of the radio frequency composite signal of the electrically tunable antenna, outputting the radio frequency composite signal out of the electrically tunable antenna, and transmitting the low frequency composite signal to the composite signal control circuit;
the composite signal control circuit is also used for separating the low-frequency composite signal into a direct-current power supply signal, then processing and outputting the direct-current power supply signal, separating a radio-frequency signal of the electrically-tuned antenna, filtering and demodulating the radio-frequency signal, and then outputting the radio-frequency signal.
As shown in fig. 2, the composite signal control circuit includes a signal transceiving control circuit, a narrow bandpass filter network circuit, a signal input/output control circuit, a modulation/demodulation control circuit, and a power transmission control circuit for processing a dc power signal, the signal input/output control circuit is respectively connected to the power transmission control circuit, the narrow bandpass filter network circuit, and the coaxial signal transmission connection cavity assembly to implement data bidirectional transmission, the modulation/demodulation control circuit is connected to the narrow bandpass filter network circuit to implement data bidirectional transmission, and a control signal output end of the signal transceiving control circuit is respectively connected to the modulation/demodulation control circuit, the narrow bandpass filter network circuit, and the signal input/output control circuit; wherein,
the modulation and demodulation control circuit is used for modulating and demodulating the control signal of the electrically-tunable antenna according to the corresponding control command of the signal transceiving control circuit;
the narrow band-pass filter network circuit is used for filtering the control signal of the electrically-tunable antenna according to the corresponding control command of the signal transceiving control circuit;
the signal input and output control circuit is used for receiving the direct-current power supply signal processed by the power supply transmission control circuit and receiving the modulated and filtered electrically-regulated antenna control signal according to the corresponding control command of the signal transceiving control circuit, compounding the direct-current power supply signal and the modulated and filtered electrically-regulated antenna control signal into a low-frequency composite signal and transmitting the low-frequency composite signal to the coaxial signal transmission connection cavity assembly;
the signal input and output control circuit is also used for receiving the low-frequency composite signal transmitted by the coaxial signal transmission connection cavity assembly according to the corresponding control command of the signal transceiving control circuit, separating the direct-current power supply signal and transmitting the direct-current power supply signal to the power supply transmission control circuit, and separating the unmodulated electrically-tunable antenna control signal and transmitting the unmodulated electrically-tunable antenna control signal to the narrow-band-pass filter network circuit.
As shown in fig. 2, the coaxial signal transmission connection cavity assembly includes a radio frequency composite signal connector, a transmission cavity member, a transmission coaxial member, and an electric tilt antenna radio frequency signal connector for receiving and outputting an electric tilt antenna radio frequency signal, the radio frequency composite signal connector is connected to the coaxial antenna feeder cable, and both the radio frequency composite signal connector and the electric tilt antenna radio frequency signal connector are connected to the transmission cavity member and the transmission coaxial member.
The coaxial signal transmission connection cavity assembly supports the transmission radio frequency spectrum bandwidth of 645 MHz-2700 MHz, and is compatible with the existing 2G and 3G mobile communication spectrum and the next generation 4G-LTE communication spectrum resource.
When the base station is used, the base station side only needs to connect a base station radio frequency signal RF with a radio frequency signal connecting piece (a radio frequency signal end) of the electric tuning antenna, a control signal CF of the electric tuning antenna and a direct current power supply signal DC are connected through an AISG standard interface, and a coaxial antenna feeder cable is connected with a radio frequency composite signal connecting piece (an antenna feeder cable end); the mobile electric tilt antenna side only needs to connect the radio frequency signal RF of the mobile electric tilt antenna with a radio frequency signal connecting piece (a radio frequency signal end) of the electric tilt antenna, a control signal CF and a direct current power supply signal DC of the electric tilt antenna are connected through an AISG standard interface, and a coaxial antenna feeder cable is connected with a radio frequency composite signal connecting piece (an antenna feeder cable end); the signal interface operation can be completed, and the transparent transmission of various signals is realized.
The working principle of the invention is as follows:
the modulation-demodulation control circuit can perform modulation or demodulation according to the data transmission rate of the control signal of the electric tilt antenna under the control of the signal transceiving control circuit, perform filtering processing through a narrow band-pass filter network circuit, perform low-frequency signal composite control and output power adjustment on the control signal of the electric tilt antenna and a direct-current power supply signal through the signal input-output control circuit under the control of the signal transceiving control circuit, compensate the loss of an external circuit and a connecting cable, ensure a sufficient signal-to-noise ratio, automatically load a low-frequency composite signal to the radio-frequency signal of the electric tilt antenna through the coaxial signal transmission connecting cavity assembly to form a radio-frequency composite signal, and perform transparent transmission on the radio-frequency composite signal by using a single coaxial antenna feeder cable;
similarly, the radio frequency composite signal transmitted by the coaxial antenna feeder cable is introduced by the radio frequency composite signal connecting piece, the radio frequency signal and the low frequency composite signal of the electric tilt antenna are separated by the transmission cavity component and the transmission coaxial component, the radio frequency signal of the electric tilt antenna is output by the radio frequency signal connecting piece of the electric tilt antenna, the low-frequency composite signal is controlled by the signal transceiving control circuit by the signal input and output control circuit to separate out a direct-current power supply signal and an unmodulated electrically-tunable antenna control signal, and the unmodulated electrically-tunable antenna control signal is filtered by the narrow-band-pass filter network circuit, and under the action of the modulation and demodulation control circuit controlled by the signal transceiving control circuit, the transmitted electric tilt antenna control signal is demodulated, the composite reverse operation of the signal is completed, and the transparent transmission of the electric tilt antenna control signal CF, the direct current power supply signal DC and the antenna radio frequency signal RF is realized.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The utility model provides an electricity accent antenna modem communication system, includes a plurality of electricity accent antenna modem controlling means to a plurality of electricity accent antenna modem controlling means are connected through coaxial antenna feeder cable, its characterized in that: each electrically-tunable antenna modulation-demodulation control device comprises a composite signal control circuit and a coaxial signal transmission connection cavity assembly, and the composite signal control circuit is connected with the coaxial signal transmission connection cavity assembly to realize bidirectional data transmission; wherein,
the composite signal control circuit comprises a signal transceiving control circuit, a narrow band-pass filter network circuit, a signal input/output control circuit, a modulation/demodulation control circuit and a power transmission control circuit for processing a direct-current power supply signal, wherein the signal input/output control circuit is respectively connected with the power transmission control circuit, the narrow band-pass filter network circuit and the coaxial signal transmission connection cavity assembly to realize data bidirectional transmission; the composite signal control circuit is used for receiving the control signal of the electrically-tunable antenna, modulating and filtering the control signal, receiving the direct-current power supply signal and compounding the control signal into a low-frequency composite signal;
the coaxial signal transmission connection cavity assembly comprises a radio frequency composite signal connecting piece, a transmission cavity component, a transmission coaxial component and an electric tilt antenna radio frequency signal connecting piece for receiving and outputting an electric tilt antenna radio frequency signal, the radio frequency composite signal connecting piece is connected with the coaxial antenna feeder cable, and the radio frequency composite signal connecting piece and the electric tilt antenna radio frequency signal connecting piece are both connected to the transmission cavity component and the transmission coaxial component; the coaxial signal transmission connection cavity assembly is used for receiving radio frequency signals of the electrically-tuned antenna and receiving low-frequency composite signals transmitted by the composite signal control circuit, and compounding the radio frequency signals and the low-frequency composite signals into radio frequency composite signals which are transmitted to the coaxial antenna feeder cable; the coaxial signal transmission connection cavity assembly is also used for receiving the radio frequency composite signal transmitted by the coaxial antenna feeder cable, separating the radio frequency composite signal out of the radio frequency composite signal of the electrically tunable antenna, outputting the radio frequency composite signal out of the radio frequency composite signal, and transmitting the low frequency composite signal to the composite signal control circuit;
the composite signal control circuit is also used for separating the low-frequency composite signal into a direct-current power supply signal, then processing and outputting the direct-current power supply signal, separating a radio-frequency signal of the electrically-tunable antenna, filtering and demodulating the radio-frequency signal, and then outputting the radio-frequency signal.
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| CN201310385733.7A CN103442461B (en) | 2013-08-30 | 2013-08-30 | Electrically tunable antenna modulation-demodulation communication system |
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| CN201310385733.7A CN103442461B (en) | 2013-08-30 | 2013-08-30 | Electrically tunable antenna modulation-demodulation communication system |
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| CN101626252B (en) * | 2009-08-11 | 2013-01-09 | 武汉凡谷电子技术股份有限公司 | AISG tower mounted amplifier OOK MODEM circuit |
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Effective date of registration: 20170602 Address after: 213164 wind road, Wujin hi tech Industrial Development Zone, Changzhou, Jiangsu Co-patentee after: JIANGSU University OF TECHNOLOGY Patentee after: Changzhou Amphenol Fuyang Communication Equipment Co.,Ltd. Address before: 213001 Changzhou Province in the Clock Tower District, Jiangsu, Wu Road, No. 1801 Patentee before: Jiangsu University of Technology |
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