Array sparse optimization method based on adaptive genetic algorithm

Abstract

The invention provides a sparse array optimization method based on an adaptive genetic algorithm in the technical field of radar reconnaissance array optimization. The method comprises the following steps of optimizing a model by proposing an array, encoding arrays, then, calculating a fitness value by utilizing a Cramer-Rao bound; selecting and crossly mutating the generated individuals by utilizing the fitness value, correspondingly changing crossover probability and mutation probability along with the increase of iteration times, finally optimizing to obtain the optimal individual, and taking the sparse array placement mode corresponding to the optimal individual as the optimal placement mode of array elements in the radar array. The method is a sparse array optimization method based ona self-adaptive genetic algorithm, an array element selection mode mainly takes the maximum array aperture and the minimum array element spacing as constraint conditions, takes a Cramer-Rao bound asa fitness function, and ensures that the array has relatively high direction finding performance under the conditions of the same array element number and the same minimum array element spacing.

Description

technical field [0001] The invention belongs to the technical field of radar reconnaissance array optimization, and particularly proposes an array sparse optimization method based on an adaptive genetic algorithm. The optimal sparse array obtained by the method optimization of the present invention constrains the maximum array aperture, the minimum Under the condition of the array element spacing, the array Cramereau limit value is the smallest, so that the direction finding accuracy is the highest during reconnaissance. Background technique [0002] In practical applications, with the development of technology and the needs of operations, the passive receiving detection on the active phased array to complete the active and passive integration, and even the demand design of the passive radar detection system based on the phased array system have been regarded as Research hotspots. This makes it particularly important to select the array element antenna design for passive de...

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Problems solved by technology

Existing literature shows that most of radar sparse array optimization belongs to the field of active radar array optimization, with the beam width as the constraint condition, but in practical applications, it is necessary to realize passive reconnaissance in the original active phased array, so a kind of passive reconnaissance is needed. Array sparse optimization method under constraints such as limited array range in radar field

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