Space-time direction finding method based on quantum cell membrane optimization mechanism

Abstract

The invention belongs to the field of array signal processing, and specifically relates to a space-time direction finding method based on a quantum cell membrane optimization mechanism. The method comprises the following steps: acquiring signal time-domain data, sampling signal snapshot and performing time-domain delay on sampling data; constructing a maximum likelihood estimation equation of maximum likelihood estimation, initializing a quantum matter group, and constructing a fitness function; selecting elite quantum individuals, and locally searched for the elite quantum individuals; classifying quantum individual types; implementing free diffusion of high-concentration fat-soluble quantum individuals; implementing motion of high-concentration non-fat-soluble quantum individuals; implementing motion of low-concentration quantum individuals; generating a new generation quantum matter group; and judging whether the maximum number of iterations is reached or not. Through adoption of the space-time direction finding method based on the quantum cell membrane optimization mechanism designed by the invention, the problem of large calculation amount of the maximum likelihood estimationmethod is solved; more accurate joint estimation results of signal angle and frequency can be obtained rapidly; and real-time processing in engineering application is facilitated.

Description

technical field [0001] The invention belongs to the field of array signal processing, and in particular relates to a space-time direction finding method based on a quantum cell membrane optimization mechanism. Background technique [0002] Direction-finding technology is an important branch of array signal processing technology. Most direction-finding technologies are aimed at the estimation of one-dimensional signal parameters of azimuth, but relatively speaking, the estimation of multi-dimensional parameters is closer to practical applications. One of the important research Direction is the space-time direction finding problem. [0003] Among many direction-finding methods, the direction-finding method using the principle of maximum likelihood estimation is simple in principle, can detect the direction of coherent sources, and has strong robustness and stability. However, due to the complicated implementation process in practical applications, the two-dimensional search T...

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Problems solved by technology

[0006] The present invention aims at the problems that the existing maximum likelihood direction finding method has a large amount of calculation, high system complexity, and it is difficult to quickly and accurately realize the joint estimation of frequency and azimuth angle, and designs a space-time direction finding method based on the quantum cell membrane optimization mechanism

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