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Method and device for target detection and parameter estimation of frequency hopping signals

A technology of parameter estimation and target detection, which is applied in the field of signal processing, can solve the problem of inaccurate target detection of frequency hopping signals, and achieve the effects of improving positioning accuracy, target detection probability, accurate recognition rate, and low signal-to-noise ratio

Active Publication Date: 2020-08-21
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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Problems solved by technology

[0004] The object of the present invention is to provide a method and device for target detection and parameter estimation of frequency hopping signals to solve the problem of inaccurate target detection for frequency hopping signals in the prior art

Method used

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  • Method and device for target detection and parameter estimation of frequency hopping signals
  • Method and device for target detection and parameter estimation of frequency hopping signals
  • Method and device for target detection and parameter estimation of frequency hopping signals

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] Such as figure 1 As shown, the present invention comprises: 1) carry out two-way collection to detection signal, obtain two-way frequency-hopping pulse signal; 2) regard one-way signal as reference signal, realize the pulse compression of second-way signal; 3) by means of generalized Radon 4) Use the parameter estimation results to compensate the phase; 5) Use FFT to realize the accumulation of the target in the fast time dimension and slow time dimension.

[0034] 1) Two-way acquisition of the detection signal to obtain the frequency-hopping pulse signal r 1 (t,n) and r 2 (t,t m ,n), where:

[0035]

[0036]

[0037]

[0038]

[0039] In the formula, A 1 and A 2 Indicates the signal amplitude of each channel; t indicates the fast time, t m Represents the slow time, c represents the wave velocity (electromagnetic wave propagation spe...

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Abstract

The invention relates to the field of signal processing, in particular to a frequency hopping signal target detection and parameter estimation method and device, wherein the collected signal is subjected to pulse compression by performing two-way acquisition on the signal of a target radiation source; then, phase compensation is carried out in combination with parameter estimation; finally, FFT accumulation is performed on a time dimension to obtain a target signal; and the position of the target radiation source is obtained according to the target signal. According to the frequency hopping signal target detection and parameter estimation method and device in the invention, the frequency hopping signal can be effectively processed; the positioning precision of the target radiation source and the target detection probability are improved; theoretical support is provided for the detection of the frequency hopping signal; the relatively low signal-to-noise ratio is adapted to; and accurate identification rate is achieved.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method and device for target detection and parameter estimation of frequency hopping signals. Background technique [0002] In recent years, with the intensification of electronic warfare, passive radar has increasingly become the research focus at home and abroad because of its good concealment, strong survivability and anti-stealth characteristics. The detection and processing technology for radiation source signals is an important part of it. The ability to obtain accurate parameters of radiation source signals is an important basis for back-end target positioning and is of great significance. [0003] With the continuous development and progress of technology, new system radars emerge in endlessly, the form of radar signals is becoming more and more complex, and the radiation sources of complex system radars are increasing rapidly and gradually occupying a dominant position...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/00
CPCG01S5/00
Inventor 胡德秀刘智鑫赵拥军赵勇胜刘亚奇赵砚刘成城白航
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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