Wireless signal direction-finding method based on CORDIC (coordinated rotation digital computer) algorithm
A wireless signal and algorithm technology, applied in the field of DOA (direction of arrival) estimation, can solve the problems of high computational complexity and large resource consumption, to ensure the accuracy of direction finding, improve performance, reduce logic resources and multiplier resources The effect of consumption
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[0073] Such as image 3 As shown, the present invention is based on the wireless signal direction finding method of CORDIC algorithm, comprises:
[0074] a. First, preprocess the received AD sampling data through the preprocessing module, and complete the signal preprocessing of removing the mean value, Hilbert transform and AGC, convert the signal after AD sampling into a complex signal, and divide it into IQ two-way parallel data output . Since the system uses 4 array elements, the preprocessing module contains 4 identical processing modules, and a total of 8 parallel data outputs;
[0075] b. The 8-way IQ data output by the output signal of the preprocessing module is received by the autocorrelation matrix solving module to complete the solution of the autocorrelation matrix. This module outputs 10 elements in the autocorrelation matrix in parallel;
[0076] c. In the adjoint matrix solving module, the MVDR algorithm is improved and simplified based on the CORDIC algorit...
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