An improved eigenstructure method for estimating DOA in the presence of parameters uncertainties

Xiaowei Niu, Liwan Chen, Qiang Chen, Hui Xie, Hongbing Li

School of Electronic and information engineering, Chongqing Three Gorges University, Zip code, 404000, Wan Zhou, China

 This paper presents an improved eigenstructure-based method for estimating the direction of arrival (DOA) of received signal in uniform circular-array, in the presence of sensor gain and phase uncertainties. A simple sensor gain and phase uncertainties calibration method, which does not require any prior knowledge of the DOAs, but also being capable of eliminating the DOA estimation ambiguity, is proposed. The performance of the proposed method is demonstrated by some representative computer simulation.