CN201497809U - Combined interference discriminator - Google Patents
Combined interference discriminator Download PDFInfo
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- CN201497809U CN201497809U CN2009202311620U CN200920231162U CN201497809U CN 201497809 U CN201497809 U CN 201497809U CN 2009202311620 U CN2009202311620 U CN 2009202311620U CN 200920231162 U CN200920231162 U CN 200920231162U CN 201497809 U CN201497809 U CN 201497809U
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Abstract
The utility model relates to a combined interference discriminator, which comprises a microwave receiving front end, a frequency mixer, a frequency synthesizer, a power divider, a combined interference identification module and a main control computer. The microwave receiving front end filters and amplifies input signals according to the operating frequency range of the system; due to narrow bandwidth of intermediate frequency, the radio-frequency signals and the signals provided by the frequency synthesizer are required to conduct frequency mixing through the frequency mixer; the frequency of the frequency synthesizer is controlled by a frequency control code to ensure the signals to be in the range of intermediate frequency; the signals after receiving frequency mixing are filtered to become intermediate frequency signals, then are amplified and divided by the power divider, and are stored through A/D sampling; the interference identification module is provided with a digital signal processor which can analyze and process data; the signal template to be identified is pre-assembled in the digital signal processor; and the main control computer mainly receives and judges results, and radar analog signal information is also transmitted into the digital signal processor through the main control computer.
Description
Technical field
The utility model relates to a kind of combined interference recognizer, is applicable in the electronic countermeasure exercise equipment, also can detect the receipts of detecing that are used for signal specific in the receiving unit at electronics simultaneously.
Background technology
Electronic interferences is the main means of electronic attack, also is a kind of traditional electronic warfare means.Radar has many types, and structure is different with the course of work, thereby also different to their conflicting mode.This just requires electronic jamming device, and different signal environments is made different reactions.In order to adapt to the needs of modern war, the training of electronic countermeasure also becomes the part of daily workout, after electronic jamming device discharges undesired signal, need monitor undesired signal by the interference interception system of special use, and differentiate the undesired signal kind that discharges, to differentiate the validity of disturbing.Also can adjust the interference protection measure of radar simultaneously according to the type of disturbing.
The utility model content
1, technical problem to be solved in the utility model:
Providing a kind of at above not enough the utility model can have under the situation of noise, effectively determines the combined interference recognizer of the cheating interference of phase-coded signal.
2, technical scheme:
The utility model comprises microwave receiving front end, frequency mixer, frequency synthesizer, power splitter, combined interference identification module, parameter measurement circuit, noise judging circuit, main control computer; The microwave receiver front end carries out filtering according to the operating frequency range of system to input signal and signal is amplified, because the bandwidth of intermediate frequency is narrower, need the signal that radiofrequency signal and frequency synthesizer provide is carried out mixing by frequency mixer, the frequency that the control of frequency control sign indicating number is combined frequently falls in the intermediate frequency range to guarantee signal, signal after the mixing obtains intermediate-freuqncy signal through filtering, after this signal amplifies, by power splitter signal is divided into two-way, one road signal is through A/D sampling storage, disturb identification module to have digital signal processor, can carry out analyzing and processing data; The signal templates of discerning can be pre-assembled in the digital signal processor; Another road signal is through logarithmic detector, signal after the detection by parameter measurement circuit to the storage of sampling of the amplitude of rectified signal, in the noise judging circuit, digital signal processor is also arranged, after sampled data is read in, the data that surpass continuously threshold value are added up, and compare, whether have noise to differentiate with the width of radar simulation signal; As have noise, and can control frequently to combine in the bandwidth of system's received signal and sweep to the high-end frequency sweep of carrying out by low side, utilize intermediate-frequency bandwidth narrower, the value of intermediate frequency amplitude detection enters how much changing of intermediate frequency with noise signal; During frequency sweep, all stay for some time at each Frequency point, the sampled value according to the intermediate frequency amplitude detection of each Frequency point after comparison process, can obtain noise bandwidth; Main control computer mainly receives the differentiation result, and the radar simulation signal message also imports in the digital signal processor by main control computer.
3, beneficial effect:
The utility model has solved when radar signal is phase-coded signal, and the differentiation problem of the combined interference that noise and cheating interference form effectively raises the accuracy rate of judgement, thereby it is used widely in electronic countermeasure.
Description of drawings
Fig. 1 is the application block diagram of the utility model in electronic interferences;
Fig. 2 detects application block diagram in the receipts for the utility model at electronics;
Fig. 3 is a theory diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and the specific embodiments the utility model is described further.
As shown in Figure 3, the microwave receiver front end carries out filtering according to the operating frequency range of system to input signal and signal is amplified, because the bandwidth of intermediate frequency is narrower, need radiofrequency signal and the signal that frequency synthesizer (being called for short comprehensive frequently) provides are carried out mixing by frequency mixer, the frequency that the control of frequency control sign indicating number is combined frequently falls in the intermediate frequency range to guarantee signal, signal after the mixing obtains intermediate-freuqncy signal through filtering, after this signal amplifies, by power splitter signal is divided into two-way, one road signal is through A/D sampling storage, disturb identification module to have digital signal processor, can carry out analyzing and processing data.The signal templates of discerning can be pre-assembled in the digital signal processor.Another road signal is through logarithmic detector, signal after the detection by parameter measurement circuit to the storage of sampling of the amplitude of rectified signal, in the noise judging circuit, digital signal processor is also arranged, after sampled data is read in, the data that surpass continuously threshold value are added up, and compare, whether have noise to differentiate with the width of radar simulation signal.As have noise, and can control frequently to combine in the bandwidth of system's received signal and sweep to the high-end frequency sweep of carrying out by low side, utilize intermediate-frequency bandwidth narrower, the value of intermediate frequency amplitude detection enters how much changing of intermediate frequency with noise signal.During frequency sweep, all stay for some time at each Frequency point, the sampled value according to the intermediate frequency amplitude detection of each Frequency point after comparison process, can obtain noise bandwidth.
In order to improve the monitoring probability of cheating interference signal, can utilize the radar simulation signal message of knowing in advance, in digital signal processor,, form the data processing section as far as possible with sampled data length peek near a pulse width.Because the unknown of cheating interference zero-time, for fear of the section of fetching data may not include the cheating interference signal fully.The starting point of data is slided, like this, always have one piece of data to comprise a complete cheating interference signal pulse sampled data basically.For single CF signal, the frequency spectrum maximal value of this segment data appears at the cheating interference signal frequency.And in other the data of time period, its signal form is a noise, and the frequency spectrum maximal value does not concentrate on the fixed frequency.During coded signal, by the signal encoding structure signal templates of knowing in advance, each data processing section of input signal is carried out coherent detection according to this template, whether has the cheating interference signal to differentiate in the cheating interference signal is arteries and veins.When having cheating interference and noise simultaneously, there is combined interference in differentiation.Main control computer mainly receives the differentiation result, and the radar simulation signal message also imports in the digital signal processor by main control computer.
As shown in Figure 1, native system can be used for the electronic countermeasure training, and Simulated Signal Source of Radar produces the radar simulation signal.The utility model equipment is used to detect the receipts undesired signal, differentiates the type that dispensing is disturbed, to judge the validity of disturbing.Disturb the template of signal in the identification module to preestablish according to the signal of dummy source.The radio-frequency input signals that receiver front end receives antenna according to the operating frequency range of system carries out filtering and signal is amplified, because the bandwidth of intermediate frequency is narrower, need that the signal that provides is provided for radiofrequency signal and frequency and carry out mixing, the frequency that the control of frequency control sign indicating number is combined frequently receives in the intermediate frequency range to guarantee that signal falls into, in native system, can provide by Simulated Signal Source of Radar, signal after the mixing obtains intermediate-freuqncy signal after filtering, after this signal amplifies, by power splitter signal is divided into two-way, one road signal is through the A/D sampling, and sampled data stored, subsequently data are carried out analyzing and processing.Another road signal is through logarithmic detector, signal after the detection by parameter measurement circuit to the storage of sampling of the amplitude of rectified signal, parameter measurement circuit also can be carried out width measure to the guinea pig signal simultaneously, in the noise judging circuit, data are read in, the data that surpass continuously threshold value are added up, and compare, whether have noise to differentiate with the width of radar simulation signal.Main control computer mainly receives the differentiation result, and the radar simulation signal message also imports in the digital signal processor by main control computer.
As shown in Figure 2, can be used for detecing of signal specific received detection at native system, detect receiving unit and measure frequency input signal, the radio-frequency input signals that receiver front end receives antenna according to the operating frequency range of system carries out filtering and signal is amplified, because the bandwidth of intermediate frequency is narrower, need that the signal that provides is provided for radiofrequency signal and frequency and carry out mixing, the frequency that the control of frequency control sign indicating number is combined frequently falls in the intermediate frequency range to guarantee signal, signal frequency provides by detecing the receiving unit measurement in native system, signal after the mixing obtains intermediate-freuqncy signal after filtering, after this signal amplifies, through the A/D sampling, and sampled data stored, in the signal identification module, data are carried out analyzing and processing subsequently.In order to improve processing speed, when signal specific has when a plurality of, can form by a plurality of signal identification modules, the signal templates difference that each signal identification module is packed into, each module is carried out relevant treatment to sampled signal simultaneously.Main control computer mainly receives the differentiation result, and signal specific information is also imported in the digital signal processor by main control computer.
Claims (2)
1. a combined interference recognizer is characterized in that: comprise microwave receiving front end, frequency mixer, frequency synthesizer, power splitter, combined interference identification module, main control computer; The microwave receiver front end carries out filtering according to the operating frequency range of system to input signal and signal is amplified, because the bandwidth of intermediate frequency is narrower, need the signal that radiofrequency signal and frequency synthesizer provide is carried out mixing by frequency mixer, the frequency that the control of frequency control sign indicating number is combined frequently falls in the intermediate frequency range to guarantee signal, signal after the mixing obtains intermediate-freuqncy signal through filtering, after this signal amplifies, by power splitter along separate routes with signal, signal is through A/D sampling storage, disturb identification module to have digital signal processor, can carry out analyzing and processing data; The signal templates of discerning can be pre-assembled in the digital signal processor; Main control computer mainly receives the differentiation result, and the radar simulation signal message also imports in the digital signal processor by main control computer.
2. combined interference recognizer according to claim 1 is characterized in that: also comprise parameter measurement circuit, noise judging circuit; Signal after the mixing obtains intermediate-freuqncy signal after filtering, this signal is divided into two-way by power splitter with signal after amplifying, and one road signal is sampled through A/D, and sampled data is stored, and subsequently data is carried out analyzing and processing; Another road signal is through logarithmic detector, signal after the detection by parameter measurement circuit to the storage of sampling of the amplitude of rectified signal, parameter measurement circuit also can be carried out width measure to the guinea pig signal simultaneously, in the noise judging circuit, data are read in, the data that surpass continuously threshold value are added up, and compare, whether have noise to differentiate with the width of radar simulation signal.
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| CN2009202311620U CN201497809U (en) | 2009-09-03 | 2009-09-03 | Combined interference discriminator |
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| CN2009202311620U CN201497809U (en) | 2009-09-03 | 2009-09-03 | Combined interference discriminator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360326A (en) * | 2014-11-24 | 2015-02-18 | 电子科技大学 | Digital storage and forwarding type interference system |
| CN106707263A (en) * | 2017-01-18 | 2017-05-24 | 浙江神州量子网络科技有限公司 | Quantum radar based on continuous variable and treatment method thereof |
| CN108847902A (en) * | 2018-06-08 | 2018-11-20 | 中国电子科技集团公司第四十研究所 | A kind of measuring circuit and measurement method of noise power |
| CN109188110A (en) * | 2018-11-09 | 2019-01-11 | 成都九华圆通科技发展有限公司 | A kind of vehicle-mounted mobile monitoring device |
| CN109493677A (en) * | 2018-12-29 | 2019-03-19 | 安徽中晨智联科技有限责任公司 | Radar countermeasures reconnaissance guarantee skill training equipment |
| CN110988925A (en) * | 2019-12-17 | 2020-04-10 | 北京遥测技术研究所 | Pulse interference detection and parameter determination method for satellite navigation receiver |
| CN111965671A (en) * | 2020-09-28 | 2020-11-20 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | GNSS signal quality monitoring and interference monitoring positioning system and method |
| CN113611063A (en) * | 2021-08-19 | 2021-11-05 | 郑州丰嘉科技有限公司 | Museum showcase composite alarm detector and anti-theft alarm method |
| CN115549707A (en) * | 2022-09-01 | 2022-12-30 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Low-frequency lightning noise cooperative processing device and method |
-
2009
- 2009-09-03 CN CN2009202311620U patent/CN201497809U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360326A (en) * | 2014-11-24 | 2015-02-18 | 电子科技大学 | Digital storage and forwarding type interference system |
| CN106707263A (en) * | 2017-01-18 | 2017-05-24 | 浙江神州量子网络科技有限公司 | Quantum radar based on continuous variable and treatment method thereof |
| CN108847902A (en) * | 2018-06-08 | 2018-11-20 | 中国电子科技集团公司第四十研究所 | A kind of measuring circuit and measurement method of noise power |
| CN108847902B (en) * | 2018-06-08 | 2020-12-01 | 中国电子科技集团公司第四十一研究所 | Measuring circuit and measuring method for noise signal power |
| CN109188110A (en) * | 2018-11-09 | 2019-01-11 | 成都九华圆通科技发展有限公司 | A kind of vehicle-mounted mobile monitoring device |
| CN109493677A (en) * | 2018-12-29 | 2019-03-19 | 安徽中晨智联科技有限责任公司 | Radar countermeasures reconnaissance guarantee skill training equipment |
| CN110988925A (en) * | 2019-12-17 | 2020-04-10 | 北京遥测技术研究所 | Pulse interference detection and parameter determination method for satellite navigation receiver |
| CN111965671A (en) * | 2020-09-28 | 2020-11-20 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | GNSS signal quality monitoring and interference monitoring positioning system and method |
| CN113611063A (en) * | 2021-08-19 | 2021-11-05 | 郑州丰嘉科技有限公司 | Museum showcase composite alarm detector and anti-theft alarm method |
| CN115549707A (en) * | 2022-09-01 | 2022-12-30 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Low-frequency lightning noise cooperative processing device and method |
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Granted publication date: 20100602 Termination date: 20130903 |