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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 PDF

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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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pulse signal
orthogonal transformation
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CN108107411B (en
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段云鹏
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Beijing Institute of Remote Sensing Equipment
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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

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

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

一种宽带线性调频脉冲信号顶部不平度确定方法A Method for Determining Top Roughness of Broadband Chirp Signal

技术领域technical field

本发明涉及脉冲信号顶部不平度确定方法，特别是一种宽带线性调频脉冲信号顶部不平度确定方法。The invention relates to a method for determining the top roughness of a pulse signal, in particular to a method for determining the top roughness of a broadband linear frequency modulation pulse signal.

背景技术Background technique

雷达景象匹配导引头末制导时，需要确定宽带线性调频（LFM）脉冲信号的顶部不平度，用以衡量导引头发射波形的质量。宽带线性调频脉冲信号是指信号的频率在脉冲宽度内向上或者向下线性地扫描。传统的脉冲信号顶部不平度确定方法在时域进行，分别确定脉冲宽度范围内幅度包络曲线的最小值与最大值，用1减去最小值与最大值的比值，之后对差值进行百分比，此结果即是脉冲信号顶部不平度，由于幅度包络曲线使用多项式进行拟合，拟合出的幅度包络曲线与实际的幅度包络曲线存在一定精度误差，精度误差受多项式的阶数影响。When the radar scene is matched to the end guidance of the seeker, it is necessary to determine the top roughness of the broadband linear frequency modulation (LFM) pulse signal to measure the quality of the seeker's transmitted waveform. A broadband chirp signal is one in which the frequency of the signal is swept linearly up or down within the pulse width. The traditional method of determining the top roughness of the pulse signal is carried out in the time domain, respectively determining the minimum and maximum values of the amplitude envelope curve within the pulse width range, subtracting the ratio of the minimum value to the maximum value from 1, and then calculating the percentage of the difference. This result is the unevenness of the top of the pulse signal. Since the amplitude envelope curve is fitted by a polynomial, there is a certain accuracy error between the fitted amplitude envelope curve and the actual amplitude envelope curve, and the accuracy error is affected by the order of the polynomial.

离散Hilbert变换为离散希尔伯特变换，是一个正交变换，由它可以产生实信号的正交分量。The discrete Hilbert transform is the discrete Hilbert transform, which is an orthogonal transform, which can generate the orthogonal components of the real signal.

发明内容Contents of the invention

本发明目的在于提供一种宽带线性调频脉冲信号顶部不平度确定方法，解决使用传统脉冲信号顶部不平度确定方法得到的顶部不平度值精度较低的问题。The purpose of the present invention is to provide a method for determining the top roughness of a broadband chirp signal, which solves the problem of low accuracy of the top roughness value obtained by using the traditional pulse signal top roughness determination method.

一种宽带线性调频脉冲信号顶部不平度确定方法的具体步骤为：The specific steps of a method for determining the top roughness of a broadband chirp signal are as follows:

第一步搭建脉冲信号顶部不平度确定平台The first step is to build a platform for determining the unevenness of the top of the pulse signal

脉冲信号顶部不平度确定平台，包括：信号采样模块、正交变换模块和顶部不平度确定模块。所述信号采样模块的功能为：对宽带线性调频脉冲信号进行采样，形成采样序列；正交变换模块的功能为：对采样序列进行正交变换；顶部不平度确定模块的功能为：对正交变换结果取模，根据模值确定顶部不平度。The pulse signal top roughness determination platform includes: a signal sampling module, an orthogonal transformation module and a top roughness determination module. The function of the signal sampling module is: sampling the broadband chirp signal to form a sampling sequence; the function of the orthogonal transformation module is: carrying out orthogonal transformation to the sampling sequence; the function of the top unevenness determination module is: Take the modulus of the transformation result, and determine the top roughness according to the modulus value.

第二步采样模块对宽带LFM脉冲信号进行采样，形成采样序列The second step sampling module samples the wideband LFM pulse signal to form a sampling sequence

采样模块在一个脉冲宽度的时间范围内对宽带线性调频脉冲信号采样，形成采样序列，采样频率为，为时域时间参数，为时域点数索引值，，为采样序列的长度，；宽带线性脉冲信号的带宽为，脉冲宽度为，调频斜率。The sampling module samples the wideband chirp signal in the time range of a pulse width Sampling, forming a sampling sequence , the sampling frequency is , is the time domain time parameter, is the time domain point index value, , for the sampling sequence length, ;Broadband linear pulse signal with a bandwidth of , the pulse width is , FM slope .

第三步正交变换模块对采样序列进行正交变换In the third step, the orthogonal transformation module performs orthogonal transformation on the sampling sequence

正交变换模块对采样序列进行离散Hilbert变换：，得到正交变换结果，为复数，实部为同相分量，虚部为正交分量，其中表示离散Hilbert变换。Orthogonal transform module for sampling sequence Perform discrete Hilbert transform: , to get the result of the orthogonal transformation , is a complex number, the real part is the in-phase component, and the imaginary part is the quadrature component, where Represents the discrete Hilbert transform.

第四步顶部不平度确定模块对正交变换结果取模、确定顶部不平度The fourth step is to determine the top roughness module to take the modulus of the orthogonal transformation result and determine the top roughness

顶部不平度确定模块对正交变换结果取模：，得到模值，在模值中找到最大值，最小值，根据公式：，确定顶部不平度，其中表示复数取模运算。Top roughness determination module for orthogonal transformation results Modulo: , get the modulus , at the modulus value find the maximum value in , min , according to the formula: , to determine the top roughness ,in Represents a complex modulo operation.

至此实现了宽带线性调频脉冲信号顶部不平度的确定。So far, the determination of the top roughness of the broadband chirp signal has been realized.

本方法解决了使用传统脉冲信号顶部不平度确定方法得到的顶部不平度值精度较低的问题。，经过各种试验验证，认为此种方法有效、可行。目前本方法已成功应用在常规地地中远程弹道导弹的雷达景象匹配导引头中，并且在试验中，雷达景象匹配导引头确定的宽带线性调频脉冲信号顶部不平度准确，满足精度要求，能够有效的衡量导引头发射波形质量。The method solves the problem that the accuracy of the top roughness value obtained by using the traditional pulse signal top roughness determination method is low. , After various experiments, it is considered that this method is effective and feasible. At present, this method has been successfully applied in the radar scene matching seeker of conventional ground-to-ground and long-range ballistic missiles, and in the test, the top irregularity of the wideband chirp signal determined by the radar scene matching seeker is accurate and meets the accuracy requirements. It can effectively measure the quality of the launch waveform of the seeker.

具体实施方式Detailed ways

一种宽带线性调频脉冲信号顶部不平度确定方法的具体步骤为：The specific steps of a method for determining the top roughness of a broadband chirp signal are as follows:

第一步搭建脉冲信号顶部不平度确定平台The first step is to build a platform for determining the unevenness of the top of the pulse signal

脉冲信号顶部不平度确定平台，包括：信号采样模块、正交变换模块和顶部不平度确定模块。所述信号采样模块的功能为：对宽带线性调频脉冲信号进行采样，形成采样序列；正交变换模块的功能为：对采样序列进行正交变换；顶部不平度确定模块的功能为：对正交变换结果取模，根据模值确定顶部不平度。The pulse signal top roughness determination platform includes: a signal sampling module, an orthogonal transformation module and a top roughness determination module. The function of the signal sampling module is: sampling the broadband chirp signal to form a sampling sequence; the function of the orthogonal transformation module is: carrying out orthogonal transformation to the sampling sequence; the function of the top unevenness determination module is: Take the modulus of the transformation result, and determine the top roughness according to the modulus value.

第二步采样模块对宽带LFM脉冲信号进行采样，形成采样序列The second step sampling module samples the wideband LFM pulse signal to form a sampling sequence

采样模块在一个脉冲宽度的时间范围内对宽带线性调频脉冲信号采样，形成采样序列，采样频率为，为时域时间参数，为时域点数索引值，，为采样序列的长度，；宽带线性脉冲信号的带宽为，脉冲宽度为，调频斜率。The sampling module samples the wideband chirp signal in the time range of a pulse width Sampling, forming a sampling sequence , the sampling frequency is , is the time domain time parameter, is the time domain point index value, , for the sampling sequence length, ;Broadband linear pulse signal with a bandwidth of , the pulse width is , FM slope .

第三步正交变换模块对采样序列进行正交变换In the third step, the orthogonal transformation module performs orthogonal transformation on the sampling sequence

正交变换模块对采样序列进行离散Hilbert变换：，得到正交变换结果，为复数，实部为同相分量，虚部为正交分量，其中表示离散Hilbert变换。Orthogonal transform module for sampling sequence Perform discrete Hilbert transform: , to get the result of the orthogonal transformation , is a complex number, the real part is the in-phase component, and the imaginary part is the quadrature component, where Represents the discrete Hilbert transform.

第四步顶部不平度确定模块对正交变换结果取模、确定顶部不平度The fourth step is to determine the top roughness module to take the modulus of the orthogonal transformation result and determine the top roughness

顶部不平度确定模块对正交变换结果取模：，得到模值，在模值中找到最大值，最小值，根据公式：，确定顶部不平度，其中表示复数取模运算。Top roughness determination module for orthogonal transformation results Modulo: , get the modulus , at the modulus value find the maximum value in , min , according to the formula: , to determine the top roughness ,in Represents a complex modulo operation.

至此实现了宽带线性调频脉冲信号顶部不平度的确定。So far, the determination of the top roughness of the broadband chirp signal has been 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.
CN201611044819.3A 2016-11-24 2016-11-24 A method for determining the top roughness of broadband chirp signal Active CN108107411B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2004017547A2 (en) * 2002-08-16 2004-02-26 Wisair. Ltd. Multi-band ultra-wide band communication method and system
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
曹春雨: ""基于FPGA的窄脉冲微波信号参数测试的研究与实现"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 *
陆福敏: ""脉冲参数计量方法综述"", 《上海计量测试》 *
陈弘士 等: "《无线电计量》", 31 December 1996 *

Cited By (3)

* Cited by examiner, † Cited by third party
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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