CN102946258B - Short-wave narrow-band frequency-hopping pre-back selector - Google Patents
Short-wave narrow-band frequency-hopping pre-back selector Download PDFInfo
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- CN102946258B CN102946258B CN201210382943.6A CN201210382943A CN102946258B CN 102946258 B CN102946258 B CN 102946258B CN 201210382943 A CN201210382943 A CN 201210382943A CN 102946258 B CN102946258 B CN 102946258B
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Abstract
The invention discloses a short-wave narrow-band frequency-hopping pre-back selector. The short-wave narrow-band frequency-hopping pre-back selector comprises a wide-band frequency-hopping filter module, a main control unit and a narrow-band frequency-hopping filter module which are connected in sequence, wherein the main control unit comprises a main control unit for a preselector and a main control unit for a back selector. The short-wave narrow-band frequency-hopping pre-back selector disclosed by the invention is communication anti-jamming equipment specially equipped for short-wave communication systems, short-wave receivers, short-wave transmitters and various short-wave radio stations, can effectively eliminate jam among the short-wave equipment and jam from the external, and has high selectivity, a rapid frequency-hopping function, good in-band intermodulation performance, a low noise factor and moderate gain.
Description
Technical field
The present invention relates to the technical field of radio communication, particularly device is selected in the prognosis of shortwave narrowband frequency hopping.
Background technology
Along with the change and progress of communication environment, traditional frequency prognosis of determining selects device can not meet actual demand.The preselector that the prognosis of shortwave narrowband frequency hopping selects device both can collect mail as receiver, what also can transmit as transmitter selects device afterwards, can follow host synchronization and carry out determining frequency filtering or frequency hopping filtering; This function can effectively replace determines frequency prognosis and selects device, what both met complete machine determines frequency job requirement, main frame can be followed again at any time and carry out frequency hopping work, effectively can eliminate the strong signal disturbing that same location in short-wave radio set, short-wave receiver, short-wave transmitter, Shortwave Communication System between equipment is mutual and extraneous.
Traditional determine that frequency prognosis selects that device can not be real-time need to change operating frequency dynamically according to communication, be therefore easily subject to extraneous interference.Selectivity is that one of most important index of device is selected in prognosis, and good selectivity has important practical significance to the anti-interference improving system; Hopping time is also very important index, requires that frequency switching time is more low better, and the circuit therefore with high-speed switch is difficult point and the emphasis of design.Preselector is mainly used in the front end of receive path, in order to reduce the impact on receiving system (such as noise factor, sensitivity etc.), needing gain and the noise factor of considering preselector fully, requiring the high gain of appropriateness and low noise factor; The rear front end selecting device to be mainly used in transmission channel, in order to reduce the impact on emission system, need to take into full account rear select device intermodulation and band in gain fluctuation, in good band, gain fluctuation is conducive to the control of emission system gain.Only have minority producer can design and produce shortwave frequency hopping prognosis at present and select device, and volume is bigger than normal.The prognosis of shortwave narrowband frequency hopping selects the major technique difficulty of device mainly to concentrate on high selectivity, fast frequency-hopped function, the gain of appropriateness, low noise factor and miniaturization.
Summary of the invention
The shortcoming that the object of the invention is to overcome prior art, with not enough, provides a kind of high selectivity shortwave narrowband frequency hopping prognosis effectively can eliminating interference between shortwave equipment and external interference to select device.
In order to achieve the above object, the present invention is by the following technical solutions:
Device is selected in the prognosis of a kind of shortwave narrowband frequency hopping of the present invention, comprise the wide interval frequency hopping filtration module, main control unit and the arrowband frequency hopping filtration module that are linked in sequence, described main control unit comprise preselector main control unit and after select device main control unit, preselector main control unit and the rear device main control unit that selects are that the frequency word of the signal transmitted by external equipment is converted to address code, are selected by the frequency of address code to wide interval frequency hopping filtration module and arrowband frequency hopping filtration module and are controlled; Wide interval frequency hopping filtration module and arrowband frequency hopping filtration module carry out high selectivity filtering process with transmitting to received signal, realizes frequency hopping function simultaneously.
Preferably, described preselector main control unit comprises preselector FPGA control circuit, first power circuit, first rf inputs match circuit, first input end relay, preselector LNA I pattern block, first attenuator circuit, preselector LNA II pattern block, first output relay and the first radio-frequency (RF) output end match circuit, described first power circuit is preselector LNA I pattern block, first attenuator circuit, preselector LNA II pattern block, wide interval frequency hopping filtration module and arrowband frequency hopping filtration module are powered, described preselector FPGA control circuit controls the first relay, first attenuator and the second relay, and provide address code for wide interval frequency hopping filtration module and arrowband frequency hopping filtration module, described preselector LNA I pattern block, first attenuator circuit and preselector LNA II pattern block are linked in sequence.
Preferably, select device FPGA control circuit, second source circuit, the second rf inputs match circuit, the second input relay, the second attenuator circuit after selecting device main control unit to comprise after described, select device LNA I pattern block afterwards, select device LNA II pattern block, the second output relay and the second radio-frequency (RF) output end match circuit afterwards; Described second source circuit selects device LNA I pattern block after being, rear device LNA II pattern block, the second attenuator circuit, wide interval frequency hopping filtration module and the arrowband frequency hopping filtration module of selecting is powered; Device FPGA control circuit is selected to control the second input relay, the second attenuator circuit and the second output relay after described, and provide address code for wide interval frequency hopping filtration module and arrowband frequency hopping filtration module, described second attenuator circuit, rear select device LNA I pattern block and after select device LNA II pattern block to be linked in sequence.
Preferably, described main control unit also comprises power conversion chip, and described power conversion chip is respectively LNA I pattern block, LNA II pattern block, attenuator circuit, main control unit FPGA circuit, wide interval frequency hopping filtration module and arrowband frequency hopping filtration module and provides voltage; Described power conversion chip carries out filtering process to external voltage simultaneously, is then supplied to wide interval frequency hopping filtration module and arrowband frequency hopping filtration module.
Preferably, wide interval frequency hopping filtration module and arrowband frequency hopping filtration module are by digital units and tuned radio-frequency filter network unit composition, digital units comprises FPGA circuit and drive circuit, the frequency word that external host sends by the master control FPGA circuit of main control unit is converted to address code, issue the FPGA circuit of digital units, again by drive circuit, control the turn-on and turn-off of PIN pipe in frequency hopping filtration module.
Preferably, described drive circuit is made up of two rapidly switched tubes, resistance and electric capacity, the importation of drive circuit comprises a rapidly switched tube and a resistance, the base stage of rapidly switched tube is connected with FPGA control circuit by a resistance, and the collector electrode of another rapidly switched tube of output is connected with external power supply; External power supply provides bias voltage by several resistance to rapidly switched tube, the emitter of output rapidly switched tube is by after a resistance, export control signal, between the collector electrode of the rapidly switched tube of importation and the emitter of output rapidly switched tube, have resistance to carry out current limliting process; External power supply carries out filtering process by electric capacity.
Preferably, described tuned radio-frequency filter network unit adopts three grades of tuning manners, resonant circuit at different levels is connected by T-shaped coupling network, composition inductive type coupling network, resonant circuit adopts the mode of inductance and Capacitance parallel connection resonance, the inductance of resonant circuit is constant all the time, and changed the frequency of frequency hopping by the capacitance changing the electric capacity getting involved resonant circuit, the LC oscillating circuit on both sides carries out impedance matching to circuit.
Preferably, every one-level resonant network is identical according to the electric capacity quantity included by stepping capacitance calculation.
Preferably, described LNA I pattern block is the same with composition with LNA II pattern block structure, comprise input matching circuit, output matching circuit and multistage common-base amplification circuit, the form of the employing transformer of input matching circuit and output matching circuit, carried out the control of impedance matching and gain by the turn ratio changing transformer input and output side, multistage common-base amplifier circuit improves the isolation of input and output.
The present invention has following advantage and effect relative to prior art:
1, the present invention effectively can eliminate the interference in interference between shortwave equipment and the external world; There is the gain of high selectivity, fast frequency-hopped function, good in-band intermodulation, low noise factor and appropriateness.
2, the present invention can make the prognosis of shortwave narrowband frequency hopping select utensil to have the outer filtering characteristic of good band.
3, the present invention can make the prognosis of shortwave narrowband frequency hopping select device can carry out frequency error factor fast.
4, the present invention can make the prognosis of shortwave narrowband frequency hopping select utensil to have low noise factor, can improve sensitivity and the noise factor of receiving system.
5, the present invention can make the prognosis of shortwave narrowband frequency hopping select device miniaturized, adopts modular technology can improve operability and the maintainability of system.
Accompanying drawing explanation
Fig. 1 is the modular structural representation of the present invention;
Fig. 2 is the composition and configuration figure that device is selected in prognosis of the present invention;
Fig. 3 is the structural representation of preselector main control unit of the present invention;
Fig. 4 is the structural representation selecting device main control unit after the present invention;
Fig. 5 is the structural representation of frequency hopping filtration module.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As Fig. 1, shown in Fig. 2, device is selected in a kind of shortwave narrowband frequency hopping prognosis of the present embodiment, comprise the wide interval frequency hopping filtration module be linked in sequence, main control unit and arrowband frequency hopping filtration module, described main control unit comprise preselector main control unit and after select device main control unit, described preselector main control unit with after select the effect of device main control unit similar with principle, its effect is all select the agreement of device to process to prognosis, complete the control to each bank of filters, complete filter status to switch, the annexation of mark radio station and filter and state, show the working condition of now frequency hopping filtration module.
Preselector is identical with basic composition unit with the rear general principle of device main control unit of selecting, different with LNA I type module position unlike attenuator, mainly consider different environments for use, as preselector, LNA I pattern block, before attenuator, is conducive to the noise factor improving module and system; As after select device, attenuator, before LNA I pattern block, is conducive to the intermodulation index improving module and system.The core of main control unit is FPGA control circuit, what it mainly completed is that the frequency word sent by main frame is converted into address code, the control to frequency hopping filtration module is completed by data wire, according to actual needs simultaneously, the gain that device is selected in prognosis is controlled by the attenuation controlling attenuator, FPGA is by controlling the height of attenuator 5 control line level, the attenuation of regulated attenuator, main control unit also comprises the voltage that power conversion chip produces and is supplied to LNA module in addition, and attenuator and frequency hopping filtration module use.
As shown in Figure 3, described preselector main control unit comprises preselector FPGA control circuit, first power circuit, first rf inputs match circuit, first input end relay, preselector LNA I pattern block, first attenuator circuit, preselector LNA II pattern block, first output relay and the first radio-frequency (RF) output end match circuit, described first power circuit is preselector LNA I pattern block, first attenuator circuit, preselector LNA II pattern block, wide interval frequency hopping filtration module and arrowband frequency hopping filtration module are powered, described preselector FPGA control circuit controls the first relay, first attenuator and the second relay, and provide address code for broadband and arrowband frequency hopping filtration module, described preselector LNA I pattern block, first attenuator circuit and preselector LNA II pattern block are linked in sequence.
The complete flow process of shortwave narrowband frequency hopping preselector radiofrequency signal under the understanding and considerate condition of non-straight: first radiofrequency signal carries out impedance matching through preselector main control unit first rf inputs match circuit, then to continue input relay circuit through first, enter wide interval frequency hopping filtration module and carry out frequency hopping filtering process, the filtered signal of frequency hopping is through preselector LNA I pattern block, first attenuator circuit, after preselector LNA II pattern block, enter arrowband frequency hopping filtration module, the first output relay circuit of preselector main control unit is connected to again by RF cable, eventually pass the first radio-frequency (RF) output end match circuit and carry out impedance matching, exported by radio frequency output port, under same operating state, broadband and narrow-band filtering module pass through the control of preselector main control unit, there is identical operating center frequency, preselector main control unit is connected by RF cable with radiofrequency signal cabling between broadband and arrowband frequency hopping filtration module, preselector main control unit is connected by winding displacement with control signal and power supply signal between broadband and arrowband frequency hopping filtration module.
So-called pass-through state refers to that radiofrequency signal does not select the frequency hopping filtering process of device through the prognosis of shortwave narrowband frequency hopping, signal is directly direct after rf inputs input to be exported from radio-frequency (RF) output end, but not pass-through state refers to that radiofrequency signal have passed through the complete process of of whole arrowband frequency hopping filtration module.
As shown in Figure 4, select device FPGA control circuit, second source circuit, the second rf inputs match circuit, the second input relay, the second attenuator circuit after selecting device main control unit to comprise after described, select device LNA I pattern block afterwards, select device LNA II pattern block, the second output relay and the second radio-frequency (RF) output end match circuit afterwards; Described second source circuit selects device LNA I pattern block after being, rear device LNA II pattern block, the second attenuator circuit, wide interval frequency hopping filtration module and the arrowband frequency hopping filtration module of selecting is powered; Device FPGA control circuit is selected to control the second input relay, the second attenuator circuit and the second output relay after described, and provide address code for broadband and arrowband frequency hopping filtration module, described second attenuator circuit, rear select device LNA I pattern block and after select device LNA II pattern block to be linked in sequence.
The flow process of device radiofrequency signal under the understanding and considerate condition of non-straight is selected: radiofrequency signal is first through selecting device main control unit rf inputs match circuit to carry out impedance matching later after complete shortwave narrowband frequency hopping, then through selecting device second input relay circuit later, enter wide interval frequency hopping filtration module and carry out frequency hopping filtering process, the filtered signal of frequency hopping is through selecting device main control unit second attenuator circuit later, after select device LNA I pattern block, after select device LNA II pattern block after, enter arrowband frequency hopping filtration module, rear the second output relay circuit selecting device main control unit is connected to again by RF cable, eventually pass radio-frequency (RF) output end match circuit and carry out impedance matching, exported by radio frequency output port, under same operating state, broadband and narrow-band filtering module are by the rear control selecting device main control unit, there is identical operating center frequency, after select device main control unit to be connected by RF cable with radiofrequency signal cabling between broadband and arrowband frequency hopping filtration module, after select device main control unit to be connected by winding displacement with control signal and power supply signal between broadband and arrowband frequency hopping filtration module.
LNA I pattern block and LNA II pattern block: consider that each side such as low-noise factor, gain and volume are considered, adopt the mode of two amplifier module cascades, both principles are basically identical, choose Class A Cascaded amplification circuit to design, use wide power voltage supply, use relatively large DC power to exchange good nonlinear characteristic for, ensure good dynamic range.Transformer 1(T1) and transformer 2 (T2) realize gain control and impedance matching are carried out to circuit.Prime and rear class amplifying circuit adopt common base to amplify form, add the isolation of module input and output side.Adopt low noise amplification pipe, there is good low-noise characteristic, make final circuit meet designing requirement completely; Containing attenuation network in circuit, appropriateness the gain of LNA circuit can be regulated as required.LNA I type and LNA II pattern block adopt modular mentality of designing in addition, can directly to being inserted on main control unit, and Operation and maintenance are fine.
Frequency hopping filtration module is the core that device is selected in prognosis, comprise broadband and arrowband frequency hopping filtration module, general principle is completely the same, frequency hopping filtration module is made up of digital units and tuned radio-frequency filter network unit, digital units comprises FPGA circuit and drive circuit, and the frequency word that external host sends by master control FPGA circuit is converted to address code, issues the FPGA circuit of digital units, by drive circuit, control the turn-on and turn-off of PIN pipe in tuned radio-frequency filter network unit.Drive circuit is made up of rapidly switched tube, PIN pipe, resistance and electric capacity, can realize fast conducting and shutoff, reaches the effect controlling tuning filtering network element PIN pipe break-make.
The design of tuned radio-frequency filter network unit is core and emphasis that device is selected in whole frequency hopping prognosis, adopts three grades of tuning manners, and resonant circuit at different levels is connected by T-shaped coupling network, and composition inductive type coupling network, the LC on both sides carries out impedance matching to circuit.The number of times (adopting three times here) of increase resonance coupling reduces the optionally requirement to every one-level resonance.In addition, adopt the mode of inductance coupling high, object is the circuit simplifying coupling, if adopt capacity coupled mode, then need to use multiple control signal to control different coupling capacitances, control circuit will be more complicated, and inductance coupling high effectively can reduce the quantity of control signal, under limited volume, more simplify circuit, owing to being frequency hopping filter network, be variable relative to determining frequency to be tuned frequency.When inductance is determined, by changing the capacitance of access, the frequency of work just can be changed.The prognosis of shortwave narrowband frequency hopping selects device to be operated in different frequency ranges, need respectively to use different resonance access electric capacity, the prognosis of this frequency hopping selects device can set step value according to the actual requirements, every one-level resonant network is according to stepping capacitance calculation, comprise the electric capacity of equal number, the electric capacity stepping of each resonant network is identical, and the stepping electric capacity of each frequency range is also identical, unlike inductance value.High-speed switch PIN is comprised in circuit, there is filter with low insertion loss, high-speed switch characteristic, provides high level (>=95V) and low level (0V) to control by digital units drive circuit to radio frequency unit, reaches control radio frequency unit electric capacity and whether accesses, during high level, electric capacity does not access, and during low level, electric capacity accesses, reached the object of He Ne laser by the capacitance controlling access, frequency hopping filtration module control program as shown in Figure 5.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. device is selected in shortwave narrowband frequency hopping prognosis, it is characterized in that, comprise the wide interval frequency hopping filtration module, main control unit and the arrowband frequency hopping filtration module that are linked in sequence, described main control unit comprise preselector main control unit and after select device main control unit, preselector main control unit and the rear device main control unit that selects are that the frequency word of the signal transmitted by external equipment is converted to address code, are selected by the frequency of address code to wide interval frequency hopping filtration module and arrowband frequency hopping filtration module and are controlled, wide interval frequency hopping filtration module and arrowband frequency hopping filtration module carry out high selectivity filtering process with transmitting to received signal, realizes frequency hopping function simultaneously, described preselector main control unit comprises preselector FPGA control circuit, first power circuit, first rf inputs match circuit, first input end relay, preselector LNA I pattern block, first attenuator circuit, preselector LNA II pattern block, first output relay and the first radio-frequency (RF) output end match circuit, described first power circuit is preselector LNA I pattern block, first attenuator circuit, preselector LNA II pattern block, wide interval frequency hopping filtration module and arrowband frequency hopping filtration module are powered, described preselector FPGA control circuit controls first input end relay, first attenuator and the first output relay, and provide address code for wide interval frequency hopping filtration module and arrowband frequency hopping filtration module, described preselector LNA I pattern block, first attenuator circuit and preselector LNA II pattern block are linked in sequence, select device FPGA control circuit, second source circuit, the second rf inputs match circuit, the second input relay, the second attenuator circuit after selecting device main control unit to comprise after described, select device LNA I pattern block afterwards, select device LNA II pattern block, the second output relay and the second radio-frequency (RF) output end match circuit afterwards, described second source circuit selects device LNA I pattern block after being, rear device LNA II pattern block, the second attenuator circuit, wide interval frequency hopping filtration module and the arrowband frequency hopping filtration module of selecting is powered, device FPGA control circuit is selected to control the second input relay, the second attenuator circuit and the second output relay after described, and provide address code for wide interval frequency hopping filtration module and arrowband frequency hopping filtration module, described second attenuator circuit, rear select device LNA I pattern block and after select device LNA II pattern block to be linked in sequence.
2. device is selected in shortwave narrowband frequency hopping according to claim 1 prognosis, it is characterized in that, described main control unit also comprises power conversion chip, and described power conversion chip is respectively LNA I pattern block, LNA II pattern block, attenuator circuit, main control unit FPGA circuit, wide interval frequency hopping filtration module and arrowband frequency hopping filtration module and provides voltage; Described power conversion chip carries out filtering process to external voltage simultaneously, is then supplied to wide interval frequency hopping filtration module and arrowband frequency hopping filtration module.
3. device is selected in shortwave narrowband frequency hopping according to claim 1 prognosis, it is characterized in that, wide interval frequency hopping filtration module and arrowband frequency hopping filtration module are by digital units and tuned radio-frequency filter network unit composition, digital units comprises FPGA circuit and drive circuit, the frequency word that external host sends by the master control FPGA circuit of main control unit is converted to address code, issue the FPGA circuit of digital units, then by drive circuit, control the turn-on and turn-off of PIN pipe in frequency hopping filtration module.
4. device is selected in shortwave narrowband frequency hopping according to claim 3 prognosis, it is characterized in that, described drive circuit is made up of two rapidly switched tubes, resistance and electric capacity, the importation of drive circuit comprises a rapidly switched tube and a resistance, the base stage of rapidly switched tube is connected with FPGA control circuit by a resistance, the output of drive circuit comprises another rapidly switched tube, and the collector electrode of another rapidly switched tube is connected with external power supply; External power supply provides bias voltage by several resistance to rapidly switched tube.
5. device is selected in the shortwave narrowband frequency hopping prognosis according to claim 3 or 4, it is characterized in that, described tuned radio-frequency filter network unit adopts three grades of tuning manners, resonant circuit at different levels is connected by T-shaped coupling network, composition inductive type coupling network, resonant circuit adopts the mode of inductance and Capacitance parallel connection resonance, and the inductance of resonant circuit is constant all the time, changed the frequency of frequency hopping by the capacitance changing the electric capacity getting involved resonant circuit, the LC oscillating circuit on both sides carries out impedance matching to circuit.
6. device is selected in shortwave narrowband frequency hopping according to claim 5 prognosis, it is characterized in that, every one-level resonant network is according to stepping capacitance calculation.
7. device is selected in shortwave narrowband frequency hopping according to claim 1 prognosis, it is characterized in that, LNA I pattern block is the same with composition with LNA II pattern block structure, comprise input matching circuit, output matching circuit and multistage common-base amplification circuit, the form of the employing transformer of input matching circuit and output matching circuit, carried out the control of impedance matching and gain by the turn ratio changing transformer input and output side, multistage common-base amplifier circuit improves the isolation of input and output.
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| CN104253628B (en) * | 2014-09-10 | 2016-05-25 | 宝鸡烽火诺信科技有限公司 | Device is selected in a kind of shortwave prognosis |
| CN106506039B (en) * | 2016-12-13 | 2019-05-03 | 宝鸡烽火诺信科技有限公司 | Device control system is selected in a kind of shortwave prognosis |
| CN106712805A (en) * | 2016-12-30 | 2017-05-24 | 陕西烽火电子股份有限公司 | Shortwave pre-post selector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201608711U (en) * | 2009-09-09 | 2010-10-13 | 朱辉 | Ultra-high speed short-wave band broadband preselector |
| CN102510269A (en) * | 2011-11-09 | 2012-06-20 | 广东圣大电子有限公司 | Small short-wave preselector |
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| KR100996430B1 (en) * | 2009-05-08 | 2010-11-24 | 국방과학연구소 | Frequency hopping signal collection device and method using azimuth information |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201608711U (en) * | 2009-09-09 | 2010-10-13 | 朱辉 | Ultra-high speed short-wave band broadband preselector |
| CN102510269A (en) * | 2011-11-09 | 2012-06-20 | 广东圣大电子有限公司 | Small short-wave preselector |
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