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Passive bistatic radar signal processing method based on blind equalization of cyclic constant modulus

A bistatic radar and cycle constant technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as slow convergence speed, slow convergence, and difficult convergence of adaptive filtering algorithms, so as to reduce mean square error, improve convergence ability, The effect of improving object detection ability

Inactive Publication Date: 2015-07-01
HOHAI UNIV
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Problems solved by technology

But the convergence rate of the algorithm is slow
For a frame of data, the slow convergence leads to difficulty in the convergence of the adaptive filtering algorithm after inputting the subsequent adaptive filtering algorithm

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  • Passive bistatic radar signal processing method based on blind equalization of cyclic constant modulus
  • Passive bistatic radar signal processing method based on blind equalization of cyclic constant modulus
  • Passive bistatic radar signal processing method based on blind equalization of cyclic constant modulus

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] figure 1 It is a schematic flow chart of the steps of an embodiment of the passive bistatic radar signal processing method based on cyclic constant module-blind equalization provided by the present invention, figure 2 It is a signal processing flow chart of an embodiment of the passive bistatic radar signal processing method based on cyclic constant module blind equalization provided by the present invention, such as figure 1 and figure 2 Shown, the pres...

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Abstract

The invention discloses a passive bistatic radar signal processing method based on the blind equalization of a cyclic constant modulus. The method comprises the steps: S101: restoring a direct wave signal in a signal received by a reference channel of passive bistatic radar by adopting a blind equalization method of cyclic constant modulus; S102: carrying out multi-diameter self-adapting filtering processing on the direct radar signal by adopting a normalized minimum mean square error according to a signal received by a monitoring channel of the passive bistatic radar; S103: carrying out cross-correlation fuzzy function calculation after the Doppler revision to the signal processed by the multi-diameter self-adapting filtering processing and the direct radar signal, so as to obtain a cross-ambiguity function, and detecting an objective. According to the method provided by the invention, the mean square error of a constant blind equalization load-balancing algorithm can be reduced, and the self-adapting convergence performance can be improved, so as to improve the target detection capability of an entire signal processing flow.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a passive bistatic radar signal processing method based on cyclic constant module-blind equalization. Background technique [0002] Direct wave recovery is one of the key technologies of passive bistatic radar target detection technology. The purity of direct wave is related to the convergence performance of the subsequent adaptive filtering algorithm and the false alarm of matched filtering. In the prior art, digital beamforming or a blind equalization algorithm is generally used to realize direct wave signal recovery. Due to the wide main lobe of digital beamforming technology, it is not conducive to the recovery of direct waves in complex multipath environments. Due to its deconvolution characteristics, the constant modulus blind equalization algorithm can effectively suppress the clutter of the main lobe and the clutter of the side lobe, so it has received mo...

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 王峰蔣德富
Owner HOHAI UNIV
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