Broadband signal quick super-resolution direction finding device realized by block sparse reconfiguration method

Abstract

The invention relates to a broadband signal quick super-resolution direction finding device realized by a block sparse reconfiguration method, which belongs to the field of signal estimation and signal processing, and solves the problem that the realization speed is relatively low due to the large calculation amount of the broadband signal super-resolution direction finding method realized by the existing sparse reconfiguration technique. The broadband signal quick super-resolution direction finding device comprises N DSPs (Digital Signal Processors) and an SRAM (Static Random Access Memory); the N DSPs include a main DSP and (N-1) slave DSPs; the SRAM memory is used for storing a redundancy library and a projection matrix of the redundancy library; W observation data is uniformly allocated and processed by the N DSPs, the observation data at each time is divided into multiple sections of data, each section of data forms a corresponding block sparse matrix, each sparse matrix is respectively processed, then fine arrival direction of a signal is estimated by making a summery on all sparse matrixes and finally the average value obtained by carrying out summation and taking the average on each DSP by the main DSP is the final direction finding angle value. The broadband signal quick super-resolution direction finding device is used for a radar, a sonar, a missile-borne system and a radio detection device.

Description

technical field [0001] The invention belongs to the field of signal estimation and signal processing. Background technique [0002] The Coherent Signal-Subspace Method (CSSM, Coherent Signal-Subspace Method) proposed by Wang and Kaveh in 1985 is a class of classic methods for processing broadband signals. Focus transformation is performed on the array covariance matrix at each frequency point, and the array flow pattern matrix at each frequency point is aligned to the reference frequency. However, the calculation of the focusing process is very large, and this kind of method often requires angle pre-estimation. , and there are often errors in the pre-estimation process, which often have unpredictable effects on the final estimation results. [0003] Sparse reconstruction technique is a method for estimating DOA of wideband signal that has emerged in recent decades. Sparse reconstruction belongs to the category of compressed sensing. For wideband signals, the most noteworth...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of slow implementation speed due to the large calculation amount of the broadband signal super-resolution direction finding method realized by the existing sparse reconstruction technology. Super-resolution direction finding device

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