Threatening radar signal detection method based on compressed sensing

A radar signal and compressed sensing technology, which is applied in the field of threat radar signal detection based on compressed sensing, can solve the problems of poor radar signal detection performance, unresolved front-end, high analog-to-digital AD sampling rate, etc., to overcome the poor performance of radar signal detection , to overcome the effect of poor signal detection performance

Active Publication Date: 2014-12-03
XIDIAN UNIV
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Problems solved by technology

This method divides signals of different frequencies into different sub-channels for detection. Although the amount of data processing on each sub-channel is reduced, there are still shortcomings in that the problem of high sampling rate of the front-end analog-to-digit...

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  • Threatening radar signal detection method based on compressed sensing
  • Threatening radar signal detection method based on compressed sensing
  • Threatening radar signal detection method based on compressed sensing

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] Refer to the attached figure 1 , the specific implementation steps of the present invention are as follows:

[0036] Step 1, generate sample space.

[0037] Extract the characteristic parameters and corresponding modulation methods of threat radar signals in the threat radar signal database, substitute the characteristic parameters into the formula corresponding to the modulation method, and calculate the sequence of signal sampling values; use the sequence of signal sampling values ​​as a sample of threat radar signals, all A collection of samples constitutes a sample space.

[0038] Using the characteristic parameters of the threat radar signal in the known threat radar signal database to generate a sampling sequence as a sample of the threat radar signal, for example, for a sinusoidal signal, known amplitude A, frequency f 0 and phase With these three fe...

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Abstract

The invention discloses a threatening radar signal detection method based on compressed sensing. The threatening radar signal detection method based on compressed sensing mainly solves the problems that during existing electronic reconnaissance, the sampling rate is high and detection is difficult under the signal parameter overlapping condition. The threatening radar signal detection method based on compressed sensing comprises the following steps of (1) generating an original radar signal sample space by means of a given threatening radar signal database, (2) establishing a redundant dictionary according to the sample space, (3) conducting sparse representation on signals to be detected, (4) conducting compressed sampling on the signals to be detected to obtain a low-dimensional observed value, (5) solving a sparse coefficient and (6) finishing detection of threatening radar signals. According to the threatening radar signal detection method based on compressed sensing, a compressed sampling method is introduced to the radar signal detection field, and radar signals overlapping in the aspects of time, space and frequency spectrums are effectively detected on the condition that the sampling rate is low.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a threat radar signal detection method based on compressed sensing in the electronic countermeasure electronic technical field. The invention can be used to detect signals overlapping in time, space and spectrum, and improve the detection performance of electronic reconnaissance receivers for threat radar signals. Background technique [0002] The purpose of electronic reconnaissance is to discover enemy threat radar signals, detect useful information from them, and guide our side to make timely, accurate and effective responses. In recent years, the increasingly complex electromagnetic environment and the emergence of LPI radar with low probability of intercept have posed great challenges for threat radar signal detection. In order to cover all possible frequency bands and azimuths of threat radars, signal detection in electronic reconnaissance usually adopts wide o...

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Application Information

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IPC IPC(8): G01S7/02
CPCG01S7/021
Inventor 董春曦沈志博张伟饶鲜黄龙赵国庆程亚娇朱颖童
Owner XIDIAN UNIV
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