Wideband direction finding method based on search evolution mechanism of quantum charged system

Abstract

The invention belongs to the field of array signal processing, specifically relates to a wideband direction finding method based on a search evolution mechanism of a quantum charged system. The methodcomprises the following steps: establishing a wideband signal sampling model; initializing the parameters of the search evolution mechanism of the quantum evolutionary system; calculating the fitnessof all charged particles and sorting in descending order; creating a quantum memory library of charged particles; updating the charged amount of charged particles and the distance between them; updating the moving probability and the applied combined force of the charged particles; updating the quantum rotation angle, the quantum position and speed of the charged particles; calculating the fitness of the charged particles and sorting in descending order; updating the quantum memory library; judging whether the maximum number of iterations is reached; and outputting a global optimal quantum position of the quantum charged system to map into an optimal position. The wideband direction finding method based on the search evolution mechanism of the quantum charged system uses the search evolution mechanism of the quantum charged system to perform direction finding on the wideband signals, which simplifies the calculation and reduces calculation time, improves the convergence speed and convergence precision, and realizes a fast and high precision direction finding.

Description

technical field [0001] The invention belongs to the field of array signal processing, and in particular relates to a broadband direction finding method based on quantum charged system search evolution mechanism. Background technique [0002] Array signal processing is an important branch of modern signal processing, and has important applications in radar, sonar, communication, video conferencing and other fields, and DOA estimation is an important research direction of array signal processing. In the past few decades, many scientists have conducted in-depth research on broadband signals and obtained significant progress. Broadband signals have the advantages of carrying a large amount of information, and are easy to detect targets, estimate parameters, and extract features. With the development of science and technology, broadband signals are becoming more and more important in the field of communication technology. [0003] The maximum likelihood method is a typical and ...

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Problems solved by technology

[0005]According to the existing literature, Chen Fuqin and Zhou Yuanping published "Microcomputer and Application" 2017, Vol.34, No.2, pp.221-228 "different In "Comparison of Signal DOA Estimation Algorithms", the ESPRIT algorithm is improved, and the low SNR sub-bands are given low weight or discarded, which reduces the error caused by uneven energy distribution, but this method has a large amount of calculation and convergence. slow

In the "Focused Subspace Orthogonality Test Broadband DOA Estimation Method" published in "Signal Processing" 2018, Vol.34, No.2, pp.221–228, Cai Jin et al. proposed a focused FTOPS algorithm. This method effectively eliminates false peaks, but still has the disadvantage of large direction-finding errors

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