CN203572968U - GP2015-based GPS anti-jamming receiver radio-frequency front-end device - Google Patents
GP2015-based GPS anti-jamming receiver radio-frequency front-end device Download PDFInfo
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- CN203572968U CN203572968U CN201320756215.7U CN201320756215U CN203572968U CN 203572968 U CN203572968 U CN 203572968U CN 201320756215 U CN201320756215 U CN 201320756215U CN 203572968 U CN203572968 U CN 203572968U
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Abstract
The utility model provides a GP2015-based GPS anti-jamming receiver radio-frequency front-end device. The device comprises four identical signal processing units, each of which includes a 10MHz temperature compensated crystal oscillator TCXO, and a three-stage cascaded low-noise amplifier, a radio frequency filter, a GP2015 unit and an intermediate-frequency amplifier which are connected in series, wherein the 10MHz temperature compensated crystal oscillator TCXO is connected with the GP2015 unit. The device can be used for processing a GPS signal input by a four-element antenna array and simultaneously outputting four paths of 4.309MHz intermediate-frequency signals at a GPSL1 (the frequency is 1575.42MHz) frequency point. 80dB power gain, 3dB system noise figure and 2MHz intermediate-frequency bandwidth can be achieved. The GP2015-based GPS anti-jamming receiver radio-frequency front-end device has the characteristics of small size, low power consumption, high integration degree and low cost.
Description
Technical field
The utility model belongs to radio communication and Satellite Navigation Technique field, is specifically related to a kind of GPS(Global Position System based on GP2015, GPS) antijam receiver radio frequency front-end device.
Background technology
GPS is the system of the service such as a kind ofly can provide in the world round-the-clock location, time service, test the speed.Along with constantly improving and development of this system, GPS is widely used in economic construction, science and technology and the numerous areas such as military.The power that arrives ground due to the satellite-signal of gps satellite transmitting is very weak, add the appearance of unforeseen rugged surroundings and special GPS jammer, be no matter unintentionally or artificial, these will cause gps signal to be interfered, and when serious, even cannot normally work.In order to make GPS receiver can deal with complex environment more, improve the antijamming capability of self, and radio-frequency front-end in whole receiver system in critical role, therefore the research of anti-interference GPS receiver radio frequency front end is significant.
Be all the radio-frequency front-end design for common receiver at present mostly, lack for the particularly design of antijam receiver radio-frequency front-end of professional receiver.
Utility model content
The problem existing for background technology, the utility model provides a kind of GPS antijam receiver radio-frequency front-end based on GP2015.The utility model is listed as and is received respectively four road gps signals by quaternary antenna array, and the GPS L1 frequency signal in the gps signal of Ba Si road is down-converted to intermediate frequency 4.309MHz output by four signal processing units.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of GPS antijam receiver radio frequency front-end device based on GP2015, comprise four identical signal processing units, each signal processing unit comprises 10MHz temperature compensating type crystal oscillator TCXO and low noise amplifier, radio-frequency filter, GP2015 unit, the intermediate frequency amplifier of three-stage cascade connecting successively; 10MHz temperature compensating type crystal oscillator TCXO is connected with GP2015 unit.
Described GP2015 unit comprises radio frequency front end chip GP2015 and the coupled centre frequency of difference
For the bandpass filter of 175.42MHz, bandpass filter, the 10MHz clock-signal generator that centre frequency is 35.42MHz.
The centre frequency of described radio-frequency filter is 1575.42MHz, and 1dB pass band width is 15.3MHz.
Compared with prior art, the utlity model has following advantage and effect:
1, the utility model can be processed the gps signal of quaternary antenna array row input, and export four road GPS L1(frequencies is 1575.42MHz simultaneously) the 4.309MHz intermediate-freuqncy signal of frequency.
2, the utility model can be realized 80dB power gain, the system noise factor of 3dB, the intermediate-frequency bandwidth of 2MHz.
3, the utlity model has the feature that volume is little, low in energy consumption, integrated level is high, with low cost.
Accompanying drawing explanation
Fig. 1 is one-piece construction block diagram of the present utility model.
Fig. 2 is the structured flowchart of a signal processing unit in the utility model.
Fig. 3 is the GP2015 unit block diagram in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the utility model comprises the signal processing unit that four tunnels are identical, the signal processing of every road
Unit comprises 10MHz TCXO, and low noise amplifier, radio-frequency filter, GP2015 unit, the intermediate frequency amplifier of the three-stage cascade connecting successively; The GP2015 unit on 10MHz TCXO Yu Ge road is connected;
GP2015 unit comprises the bandpass filter that radio frequency front end chip GP2015 and coupled centre frequency are 175.42MHz, bandpass filter, the 10MHz clock signal that centre frequency is 35.42MHz.Frequency 1575.42MHz centered by radio-frequency filter, the SF1186 that 1dB pass band width is 15.3MHz.
It is DC (direct current) ~ 4GHz that the utility model is used frequency of operation, fixed gain is 19dB, the low noise amplifier HMC478ST89 of noise figure 2.5dB amplifies the weak satellite signal of each road antenna input, the gain of guaranteeing system is amplified in three grades of low noise amplifier cascades, signal after three grades of low noise amplifiers amplify is 1575.42MHz by centre frequency again, 1dB pass band width is the signal that the radio-frequency filter SF1186 of 15.3MHz selects GPS L1 frequency, the Noise and Interference outside inhibition zone.The radiofrequency signal of radio-frequency filter SF1186 output enters GP2015 unit, three grades of mixing structures of the inner employing of radio frequency front end chip GP2015, and its reference clock signal is from the 10MHz of TCXO.The PLL(Phase Locked Loop that the GPS L1 frequency signal of input and GP2015 are inner integrated, phaselocked loop) circuit first local oscillation signal (1400MHz) mixing of exporting, obtain the difference frequency signal of 175.42MHz, second level local oscillation signal (140MHz) mixing that after the LC bandpass filter that is 175.42MHz through outside centre frequency, signal and first order local oscillation signal 10 frequency divisions obtain, obtain the difference frequency signal of 35.42MHz, difference frequency signal is by outside centre frequency 35.42MHz, after the sound surface band bandpass filter SAFJA35M4WC0Z00 of three dB bandwidth 2.046MHz, enter third level local oscillation signal (31.11MHz) mixing that inner automatic gain control circuit and first order local oscillation signal 45 frequency divisions obtain, signal after mixing is through the intermediate-freuqncy signal of inner integrated intermediate-frequency filter output 4.309MHz.The intermediate-freuqncy signal of the 4.309MHz of GP2015 output enters intermediate frequency amplifier OPA698 and suitably amplifies, the loss bringing with compensation mixing and filtering at different levels in GP2015 unit, allows intermediate-freuqncy signal output can meet rear class A/D(analog/digital converter) needs of sampling.OPA698 is Voltage Feedback type broadband operational amplifier, and its gain can be adjusted by feedback resistance, thereby can gain to adjust according to actual test status and make whole system gain reach need state.
The signal processing unit that the utility model Gong Si road is identical, below in conjunction with accompanying drawing 2 brief description mentalities of designing:
The signal of antenna is at first by the low noise amplifier of three-stage cascade
,
,
, when signal is amplified, guarantee the overall noise coefficient requirement of system.Low noise amplifier
output pass through radio-frequency filter
, inhibition zone external noise and interference.The output of radio-frequency filter is sent to GP2015 unit
process and export intermediate-freuqncy signal, the clock signal of GP2015 unit is provided by TCXO.
the intermediate-freuqncy signal of output enters intermediate frequency amplifier
amplify, compensation exists
in the gain loss that brings.
output be the output of final intermediate-freuqncy signal.
Fig. 3 is GP2015 unit block diagram, first local oscillation signal (1400MHz) mixing that the inner integrated PLL circuit of the GPS L1 frequency radiofrequency signal of input and GP2015 is exported, obtain the difference frequency signal of 175.42MHz, signal and second level local oscillation signal (140MHz) mixing after the LC bandpass filter that is 175.42MHz through outside centre frequency, obtain the difference frequency signal of 35.42MHz, difference frequency signal is by outside centre frequency 35.42MHz, after the sound surface band bandpass filter SAFJA35M4WC0Z00 of three dB bandwidth 2.046MHz, enter inner automatic gain control circuit and third level local oscillation signal (31.11MHz) mixing, signal after mixing is through the intermediate-freuqncy signal of inner integrated intermediate-frequency filter output 4.309MHz.
Claims (3)
1. the GPS antijam receiver radio frequency front-end device based on GP2015, it is characterized in that: comprise four identical signal processing units, each signal processing unit comprises 10MHz temperature compensating type crystal oscillator TCXO and low noise amplifier, radio-frequency filter, GP2015 unit, the intermediate frequency amplifier of three-stage cascade connecting successively; 10MHz temperature compensating type crystal oscillator TCXO is connected with GP2015 unit.
2. a kind of GPS antijam receiver radio frequency front-end device based on GP2015 according to claim 1, is characterized in that: described GP2015 unit comprises radio frequency front end chip GP2015 and the bandpass filter that coupled centre frequency is 175.42MHz respectively, bandpass filter, the 10MHz clock-signal generator that centre frequency is 35.42MHz.
3. a kind of GPS antijam receiver radio frequency front-end device based on GP2015 according to claim 1 and 2, is characterized in that: the centre frequency of described radio-frequency filter is 1575.42MHz, and 1dB pass band width is 15.3MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320756215.7U CN203572968U (en) | 2013-11-26 | 2013-11-26 | GP2015-based GPS anti-jamming receiver radio-frequency front-end device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320756215.7U CN203572968U (en) | 2013-11-26 | 2013-11-26 | GP2015-based GPS anti-jamming receiver radio-frequency front-end device |
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| CN203572968U true CN203572968U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320756215.7U Expired - Fee Related CN203572968U (en) | 2013-11-26 | 2013-11-26 | GP2015-based GPS anti-jamming receiver radio-frequency front-end device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532276A (en) * | 2015-09-09 | 2017-03-22 | 罗克韦尔柯林斯公司 | Print TEMPERATURE COMPENSATION SYSTEM AND METHOD FOR AN ARRAY ANTENNA SYSTEM |
| CN111384986A (en) * | 2018-12-31 | 2020-07-07 | 浙江英特讯信息科技有限公司 | Intelligent communication management terminal |
-
2013
- 2013-11-26 CN CN201320756215.7U patent/CN203572968U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532276A (en) * | 2015-09-09 | 2017-03-22 | 罗克韦尔柯林斯公司 | Print TEMPERATURE COMPENSATION SYSTEM AND METHOD FOR AN ARRAY ANTENNA SYSTEM |
| CN111384986A (en) * | 2018-12-31 | 2020-07-07 | 浙江英特讯信息科技有限公司 | Intelligent communication management terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20151126 |