Optimized Least Square DOA Estimation Algorithm Based on Phase Interferometer Array

SHUAI FU, SI-YU JU, BEI-HAI WEI, HUI ZHU

Abstract


Aiming at the complex process of phase interferometer ambiguity resolution and the strict requirement of baseline comparison, an optimized least square ambiguity resolution algorithm for multi-baseline phase interferometer is proposed. This algorithm is a backward-forward derivation method. First, phase matrix is generated by off-line calculation. Then verify the uniqueness condition of correctly ambiguity resolution, and the angle of arrival (AOA) is solved by criterion function. The algorithm uses the mean square operation instead of the time-consuming cosine function calculation. The algorithm can be applied to the complex array of interferometers and makes the test of the uniqueness condition simpler. Simulation experiments are carried out under the condition of one-dimensional linear array. The result show that the algorithm is effective and has high anti-noise performance.

Keywords


DOA estimation, Phase interferometer, Ambiguity resolution, Least squareText


DOI
10.12783/dteees/peems2019/33980

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