CN105553915A - Demodulation method for intermittent radiation signal transient modulation parameter - Google Patents
Demodulation method for intermittent radiation signal transient modulation parameter Download PDFInfo
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- CN105553915A CN105553915A CN201510908254.8A CN201510908254A CN105553915A CN 105553915 A CN105553915 A CN 105553915A CN 201510908254 A CN201510908254 A CN 201510908254A CN 105553915 A CN105553915 A CN 105553915A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000005855 radiation Effects 0.000 title claims abstract description 26
- 230000001052 transient effect Effects 0.000 title claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 210000001367 artery Anatomy 0.000 claims description 13
- 210000003462 vein Anatomy 0.000 claims description 13
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000009977 dual effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 102000010029 Homer Scaffolding Proteins Human genes 0.000 description 1
- 108010077223 Homer Scaffolding Proteins Proteins 0.000 description 1
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- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3809—Amplitude regulation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
- H04L27/3836—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication
Abstract
The invention discloses a demodulation method for an intermittent radiation signal transient modulation parameter, and the method comprises the steps: 1, carrying out the microwave frequency mixing of an intermittent radiation signal, obtaining an intermediate frequency signal, carrying out microwave detection and obtaining a time domain signal; 2, carrying out the real-time sampling of the time domain signal, carrying out the analysis of a pulse signal, and obtaining a pulse parameter; 3, carrying out the real-time sampling of the intermediate frequency signal, carrying out the time-sharing extraction of in-pulse signals obtained through sampling, and sequentially carrying out single demodulation, dual demodulation and matched filtering of an obtained time slot signal.
Description
Technical field
The present invention relates to radioelectronics field, particularly intermittent radiation signal transient modulation parameter demodulation method.
Background technology
Along with the development of missile homer technology, the application of missile homing guidance signal changes pulse interval Radiation Guidance into from continuous wave guidance gradually, and guided missile electronic guidance system is increasingly sophisticated, and the target of attack of guided missile is also from simple target to multiobject technical transform.Particularly under the background of high strength interference spatial domain, require that missile guidance armament systems possess anti-interference, target identification, multiple target tracking and guidance ability, therefore, radar guidance signal have employed intermittent radiation aiming means, send the guidance signal carrying coded modulation information, the tactical qualities such as armament systems are anti-interference, Multi-target Attacking are improved greatly.But meanwhile, the complexity of guidance signal also reaches quite high degree, especially complicated, transient changing, multiplex modulated signal.Be all the problem that designer extremely pays close attention to for the modulation parameter technical characteristic of the guidance signal of radar emission and accuracy thereof all the time, but there is no effective solution in calibration testing means.
Summary of the invention
The problem that the present invention solves is that the Parameter Modulation precision of the guidance signal of radar emission in prior art is low; For solving described problem, the invention provides a kind of intermittent radiation signal transient modulation parameter demodulation method.
Intermittent radiation signal transient modulation parameter demodulation method provided by the invention comprises:
Step one, microwave mixer is carried out to described intermittent radiation signal obtain intermediate-freuqncy signal, carry out microwave detection and obtain time-domain signal;
Step 2, to described time-domain signal real-time sampling, line-pulse signal analysis of going forward side by side, obtains pulse parameter;
Step 3, to described intermediate-freuqncy signal real-time sampling, signal timesharing in the arteries and veins that obtains of sampling is extracted, one-level demodulation, secondary demodulation, matched filtering are carried out successively to the time slot signal obtained.
Further, in the arteries and veins obtained sampling, signal timesharing is extracted to comprise and is split the data of signal in arteries and veins with the time interval of signal waveform feature 1 unit in arteries and veins.
Further, described one-level demodulation comprises the filtering of setting respective bandwidth, obtains the modulation index of mixed time domain modulation signal and one-level modulation.
Further, demodulation is carried out to described mixed time domain modulation signal, obtain the modulation index of mixed time domain signal and secondary modulation.
Further, interval according to the frequency band of the modulating frequency of described mixed time domain modulation signal and mixed time domain signal, set two band pass filters, matched filtering is carried out to mixed time domain signal, obtain two modulating frequencies of carrying in mixed time domain signal.
Advantage of the present invention comprises:
From the fundamental characteristics of modulation parameter, the modulation intelligence carried by guidance signal carries out timesharing extraction, step by step demodulation, achieves the Registration to the modulating characteristic of intermittent radiation guidance signal and calibration, solves the calibration problem of this type of modulation signal.
Accompanying drawing explanation
The schematic flow sheet of the intermittent radiation signal transient modulation parameter demodulation method that Fig. 1 provides for the embodiment of the present invention;
The schematic flow sheet of the one-level demodulation of the intermittent radiation signal transient modulation parameter demodulation method that Fig. 2 provides for the embodiment of the present invention;
The schematic flow sheet of the secondary demodulation of the intermittent radiation signal transient modulation parameter demodulation method that Fig. 3 provides for the embodiment of the present invention;
The matched filtering schematic diagram of the intermittent radiation signal transient modulation parameter demodulation method that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Hereinafter, the present invention is further elaborated in conjunction with the accompanying drawings and embodiments.
Intermittent radiation signal transient modulation parameter demodulation method provided by the invention comprises:
Step one, microwave mixer is carried out to described intermittent radiation signal obtain intermediate-freuqncy signal, carry out microwave detection and obtain time-domain signal;
Step 2, to described time-domain signal real-time sampling, line-pulse signal analysis of going forward side by side, obtains pulse parameter;
Step 3, to described intermediate-freuqncy signal real-time sampling, signal timesharing in the arteries and veins that obtains of sampling is extracted, one-level demodulation, secondary demodulation, matched filtering are carried out successively to the time slot signal obtained.
Particularly, carry out time domain real-time sampling to the time-domain signal obtained and intermediate-freuqncy signal respectively by high speed acquisition module, wherein time-domain signal is as the synchronous triggering of if signal sampling; Then, one group of signal data information that time-domain signal sampling obtains, carry out the demodulation of pulse signal, the analysis mode of paired pulses parameter can be adopted during demodulation, obtain the information such as pulse period, pulse duration, rise time, one group of signal data information that intermediate-freuqncy signal real-time sampling obtains, due to the time domain change of guidance signal in arteries and veins, the signal in each sending time slots is made to be transient changing, therefore, need the timesharing time slot of each transmission being carried out to signal to extract, obtain the signal data in each time slot; Then, analyze the intra-pulse modulation model of intermittent radiation signal, to the signal data extracting each time slot obtained, carry out the demodulation process of software model; Because signal in the arteries and veins of intermittent radiation signal is a complicated multistage composite modulation signal, need the demodulation process of carrying out step by step to it, after every one-level demodulation analysis, the modulating frequency under corresponding modulation system and modulation index can be obtained, finally, by multistage demodulation process, the performance data of whole intermittent radiation signal transient modulation parameter can be obtained, realize the demodulation analysis of signal.In the present embodiment, be demodulated into example with two-stage, schematically illustrate.
Signal timesharing in arteries and veins is extracted and comprises: after intermediate-freuqncy signal real-time sampling, the time-domain signal according to Annual distribution can be thought the shape information of display, the data message according to Annual distribution can be thought the data volume collected; Then, according to the conforming principle of Annual distribution, time slot dividing is carried out to the intermediate-freuqncy signal data message collected, with the time interval of signal waveform feature 1 unit, the data of signal in arteries and veins are split, can obtain a series of time slot signal, this time slot signal is the wave character information with Annual distribution.
One-level demodulation comprises: for the data message of time slot signal, uses software and radio technique, carries out solution phase modulation, set the filtering of respective bandwidth in demodulation to this signal, thus obtains mixed time domain modulation signal.In demodulating process, utilize theory of demodulation can obtain the modulation index (i.e. phase-modulation index etc.) of one-level modulation.Secondary demodulation comprises: the mixed time domain modulation signal obtained through one-level demodulation, reuses software and radio technique, carry out solution amplitude modulation to this signal, thus obtains mixed time domain signal.In demodulating process, utilize theory of demodulation can obtain the modulation index (i.e. modulation etc.) of one-level modulation.
Matched filtering comprises: the mixed time domain signal obtained through secondary demodulation is mixed with the modulation signal that two are carried different modulating frequency.Therefore, interval according to the frequency band of two modulating frequencies, utilize software and radio technique, set two band pass filters, matched filtering is carried out to mixed time domain signal, namely obtain two modulating frequencies of carrying in mixed time domain signal by filtering.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solution of the present invention; therefore; every content not departing from technical solution of the present invention; the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong to the protection range of technical solution of the present invention.
Claims (5)
1. intermittent radiation signal transient modulation parameter demodulation method, is characterized in that, comprising:
Step one, microwave mixer is carried out to described intermittent radiation signal obtain intermediate-freuqncy signal, carry out microwave detection and obtain time-domain signal;
Step 2, to described time-domain signal real-time sampling, line-pulse signal analysis of going forward side by side, obtains pulse parameter;
Step 3, to described intermediate-freuqncy signal real-time sampling, signal timesharing in the arteries and veins that obtains of sampling is extracted, one-level demodulation, secondary demodulation, matched filtering are carried out successively to the time slot signal obtained.
2., according to intermittent radiation signal transient modulation parameter demodulation method according to claim 1, it is characterized in that, in the arteries and veins obtained sampling, signal timesharing is extracted to comprise and is split the data of signal in arteries and veins with the time interval of signal waveform feature 1 unit in arteries and veins.
3., according to intermittent radiation signal transient modulation parameter demodulation method according to claim 1, it is characterized in that, described one-level demodulation comprises the filtering of setting respective bandwidth, obtains the modulation index of mixed time domain modulation signal and one-level modulation.
4., according to intermittent radiation signal transient modulation parameter demodulation method according to claim 3, it is characterized in that, demodulation is carried out to described mixed time domain modulation signal, obtain the modulation index of mixed time domain signal and secondary modulation.
5. according to intermittent radiation signal transient modulation parameter demodulation method according to claim 4, it is characterized in that, according to one-level solution be in harmonious proportion secondary demodulation or the frequency band of modulating frequency of signal interval, set two band pass filters, matched filtering is carried out to mixed time domain signal, obtains two modulating frequencies of carrying in mixed time domain signal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116577735A (en) * | 2023-07-13 | 2023-08-11 | 南京誉葆科技股份有限公司 | Frequency spectrum-based radar signal modulation identification method |
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Inventor after: Guo Xiaoran Inventor after: Hua Xiang Inventor after: Chen Bin Inventor after: Xie Henggui Inventor after: Xu Haiyan Inventor after: Chen Guangyao Inventor before: Hua Xiang Inventor before: Chen Bin Inventor before: Xie Henggui Inventor before: Xu Haiyan Inventor before: Chen Guangyao |
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Effective date of registration: 20190923 Address after: 050000 No. 169 North Street, Xinhua District, Hebei, Shijiazhuang Applicant after: UNIT 32181 OF PLA Applicant after: SHANGHAI PRECISION METROLOGY AND TEST Research Institute Address before: 050000 No. 169 North Street, Xinhua District, Hebei, Shijiazhuang Applicant before: UNIT 63908 OF PLA Applicant before: SHANGHAI PRECISION METROLOGY AND TEST Research Institute |
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