CN108107411A - Unevenness determines method at the top of a kind of wide-band Chirp pulse signal - Google Patents
Unevenness determines method at the top of a kind of wide-band Chirp pulse signal Download PDFInfo
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- CN108107411A CN108107411A CN201611044819.3A CN201611044819A CN108107411A CN 108107411 A CN108107411 A CN 108107411A CN 201611044819 A CN201611044819 A CN 201611044819A CN 108107411 A CN108107411 A CN 108107411A
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- unevenness
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- orthogonal transformation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
Abstract
The invention discloses unevenness at the top of a kind of wide-band Chirp pulse signal to determine method, is realized by signal sampling module, orthogonal transformation module and top unevenness determining module.Signal sampling module samples wide-band Chirp pulse signal, forms sample sequence；Orthogonal transformation module carries out orthogonal transformation to sample sequence；Top unevenness determining module determines top unevenness to orthogonal transformation result modulus according to modulus value.The present invention solves the problems, such as to determine that the top injustice angle value precision that method obtains is relatively low using unevenness at the top of traditional pulse signal.
Description
Technical field
The present invention relates to unevenness at the top of pulse signal to determine method, particularly a kind of wide-band Chirp pulse signal top
Portion's unevenness determines method.
Background technology
During Radar Scene Matching target seeker terminal guidance, it is thus necessary to determine that wide-band LFM（LFM）The top of pulse signal is not
Pingdu, to weigh the quality of target seeker transmitted waveform.Wide-band Chirp pulse signal refers to that the frequency of signal is wide in pulse
In degree upwards or linearly downward scan.Unevenness determines that method is carried out in time domain at the top of traditional pulse signal, true respectively
Determine the minimum value and maximum of amplitude envelops curve in pulse width range, the ratio for subtracting minimum value and maximum with 1, afterwards
Percentage is carried out to difference, this result is unevenness at the top of pulse signal, since amplitude envelops curve is carried out using multinomial
Fitting, the amplitude envelops curve fitted is with actual amplitude envelops curve there are certain trueness error, and trueness error is by multinomial
The exponent number of formula influences.
Discrete Hilbert transform is discrete Hilbert transform, is an orthogonal transformation, and real signal can be generated by it
Quadrature component.
The content of the invention
Present invention aims at providing unevenness at the top of a kind of wide-band Chirp pulse signal to determine method, solve to use
Unevenness determines the problem of top injustice angle value precision that method obtains is relatively low at the top of traditional pulse signal.
Unevenness determines concretely comprising the following steps for method at the top of a kind of wide-band Chirp pulse signal：
The first step builds unevenness at the top of pulse signal and determines platform
Unevenness determines platform at the top of pulse signal, including：Signal sampling module, orthogonal transformation module and top unevenness determine
Module.The function of the signal sampling module is：Wide-band Chirp pulse signal is sampled, forms sample sequence；Just
Hand over conversion module function be：Orthogonal transformation is carried out to sample sequence；The function of top unevenness determining module is：To positive alternation
Result modulus is changed, top unevenness is determined according to modulus value.
Second step sampling module samples broadband LFM pulse signals, forms sample sequence
Sampling module is in the time range of a pulse width to wide-band Chirp pulse signalSampling forms sampling
Sequence, sample frequency is,For time domain time parameter,For time domain count index value,,For sampling
SequenceLength,；Wide-band linearity pulse signalBandwidth be, pulse width is, chirp rate。
3rd step orthogonal transformation module carries out orthogonal transformation to sample sequence
Orthogonal transformation module is to sample sequenceCarry out discrete Hilbert transform：, obtain orthogonal
Transformation results,For plural number, real part is in-phase component, and imaginary part is quadrature component, whereinRepresent discrete
Hilbert is converted.
Unevenness determining module is to orthogonal transformation result modulus, definite top unevenness at the top of 4th step
Top unevenness determining module is to orthogonal transformation resultModulus：, obtain modulus value, in mould
ValueMiddle maximizing, minimum value, according to formula：, determine top unevenness, whereinRepresent plural modulo operation.
So far determining for wide-band Chirp pulse signal top unevenness is realized.
The top injustice angle value precision that method obtains is determined present method solves traditional pulse signal top unevenness is used
The problem of relatively low., by various verification experimental verifications, it is believed that such method is effective, feasible.This method has been successfully applied in routine at present
Ground in the Radar Scene Matching target seeker of intermediate range ballistic missile, and in test, Radar Scene Matching target seeker determines
Wide-band Chirp pulse signal at the top of unevenness it is accurate, meet required precision, can effectively weigh target seeker transmitted wave
Form quality amount.
Specific embodiment
Unevenness determines concretely comprising the following steps for method at the top of a kind of wide-band Chirp pulse signal：
The first step builds unevenness at the top of pulse signal and determines platform
Unevenness determines platform at the top of pulse signal, including：Signal sampling module, orthogonal transformation module and top unevenness determine
Module.The function of the signal sampling module is：Wide-band Chirp pulse signal is sampled, forms sample sequence；Just
Hand over conversion module function be：Orthogonal transformation is carried out to sample sequence；The function of top unevenness determining module is：To positive alternation
Result modulus is changed, top unevenness is determined according to modulus value.
Second step sampling module samples broadband LFM pulse signals, forms sample sequence
Sampling module is in the time range of a pulse width to wide-band Chirp pulse signalSampling forms sampling
Sequence, sample frequency is,For time domain time parameter,For time domain count index value,,For sampling
SequenceLength,；Wide-band linearity pulse signalBandwidth be, pulse width is, chirp rate。
3rd step orthogonal transformation module carries out orthogonal transformation to sample sequence
Orthogonal transformation module is to sample sequenceCarry out discrete Hilbert transform：, obtain orthogonal
Transformation results,For plural number, real part is in-phase component, and imaginary part is quadrature component, whereinRepresent discrete
Hilbert is converted.
Unevenness determining module is to orthogonal transformation result modulus, definite top unevenness at the top of 4th step
Top unevenness determining module is to orthogonal transformation resultModulus：, obtain modulus value, in mould
ValueMiddle maximizing, minimum value, according to formula：, determine top unevenness, whereinRepresent plural modulo operation.
So far determining for wide-band Chirp pulse signal top unevenness is realized.
Claims (1)
1. unevenness determines method at the top of a kind of wide-band Chirp pulse signal, it is characterised in that concretely comprises the following steps：
The first step builds unevenness at the top of pulse signal and determines platform
Unevenness determines platform at the top of pulse signal, including：Signal sampling module, orthogonal transformation module and top unevenness determine
Module；The function of the signal sampling module is：Wide-band Chirp pulse signal is sampled, forms sample sequence；Just
Hand over conversion module function be：Orthogonal transformation is carried out to sample sequence；The function of top unevenness determining module is：To positive alternation
Result modulus is changed, top unevenness is determined according to modulus value；
Second step sampling module samples broadband LFM pulse signals, forms sample sequence
Sampling module is in the time range of a pulse width to wide-band Chirp pulse signalSampling forms sampling
Sequence, sample frequency is,For time domain time parameter,For time domain count index value,,For sampling
SequenceLength,；Wide-band linearity pulse signalBandwidth be, pulse width is, chirp rate；
3rd step orthogonal transformation module carries out orthogonal transformation to sample sequence
Orthogonal transformation module is to sample sequenceCarry out discrete Hilbert transform：, obtain positive alternation
Change result,For plural number, real part is in-phase component, and imaginary part is quadrature component, whereinRepresent discrete
Hilbert is converted；
Unevenness determining module is to orthogonal transformation result modulus, definite top unevenness at the top of 4th step
Top unevenness determining module is to orthogonal transformation resultModulus：, obtain modulus value, in modulus valueMiddle maximizing, minimum value, according to formula：, determine top unevenness, wherein
Represent plural modulo operation；
So far determining for wide-band Chirp pulse signal top unevenness is realized.
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| CN201611044819.3A CN108107411B (en) | 2016-11-24 | 2016-11-24 | Broadband linear frequency modulation pulse signal top unevenness determining method |
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| CN201611044819.3A CN108107411B (en) | 2016-11-24 | 2016-11-24 | Broadband linear frequency modulation pulse signal top unevenness determining method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188370A (en) * | 2018-10-29 | 2019-01-11 | 北京遥感设备研究所 | A kind of radar equipment LFM pulse signal envelope curve approximating method and system |
| CN109490857A (en) * | 2018-10-29 | 2019-03-19 | 北京遥感设备研究所 | A kind of radar equipment LFM pulse signal Nonlinear frequency modulation degree determines method and system |
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| WO2004017547A2 (en) * | 2002-08-16 | 2004-02-26 | Wisair. Ltd. | Multi-band ultra-wide band communication method and system |
| CN1458646A (en) * | 2003-04-21 | 2003-11-26 | 北京阜国数字技术有限公司 | Filter parameter vector quantization and audio coding method via predicting combined quantization model |
| CN104754093A (en) * | 2013-12-25 | 2015-07-01 | 北京信威通信技术股份有限公司 | Test device, system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188370A (en) * | 2018-10-29 | 2019-01-11 | 北京遥感设备研究所 | A kind of radar equipment LFM pulse signal envelope curve approximating method and system |
| CN109490857A (en) * | 2018-10-29 | 2019-03-19 | 北京遥感设备研究所 | A kind of radar equipment LFM pulse signal Nonlinear frequency modulation degree determines method and system |
| CN109490857B (en) * | 2018-10-29 | 2023-01-06 | 北京遥感设备研究所 | Method and system for determining frequency modulation nonlinearity of LFM pulse signal of radar equipment |
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| CN108107411B (en) | 2021-08-13 |
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