Wireless signal direction-finding method based on CORDIC (coordinated rotation digital computer) algorithm

Abstract

The invention relates to a wireless signal direction-finding method based on a CORDIC (coordinated rotation digital computer) algorithm. The wireless signal direction-finding method includes a, switching to complex signal outputting after preprocessing of AD sampling data; b, performing autocorrelation-matrix solving and outputting on preprocessed output signals; c, according to an MVD algorithm based on the CORDIC algorithm, completing solving and outputting of each algebraic cofactor in an adjoint matrix; d, performing spatial spectrum data calculation, sequentially writing calculation results into a storage unit, and completing a building process of spatial spectra; e, reading the spatial spectrum data in the storage unit, and completing judgment of number of signals and search of direction of the signals. Compared with common MVDR direction-finding methods, the wireless signal direction-finding method has the advantages that signal arrival direction of up to three signals can be estimated, consumption of logical resources and multiplier resources during hardware realization can be greatly reduced, and direction-finding accuracy can be guaranteed, so that performance of MVDR direction-finding methods is improved greatly on the whole.

Description

technical field [0001] The invention relates to the field of DOA (Direction of Arrival) estimation in array signal processing, in particular to an optimized CORDIC algorithm-based wireless signal direction finding method in the hardware implementation process of the DOA estimation algorithm. Background technique [0002] Direction of arrival (DOA, Direction of arrival) estimation, or spatial spectrum estimation, is a major research field in array signal processing, and has important applications in both military and civilian fields. [0003] In the military field, electronic countermeasures, as a common and very effective means, are playing an increasingly important role, among which active electronic jamming is one of the most commonly used means. Active electronic jamming equipment has the characteristics of low price, strong portability, and strong jamming ability, which can effectively interfere with the normal operation of the other party's electronic equipment. If the...

AI Technical Summary

Problems solved by technology

[0038] The disadvantage of the traditional MVDR algorithm is that the algorithm itself involves complex operations such as matrix inversion, and requires a large number of multiplication operations and other operations, the computational complexity is very high, and the resource consumption is too large when implemented in hardware

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