Direction of Arrival Estimation Algorithm Based on Oblique Projections and Prior Information
JI Zhong-mei, Pla Information · Jisuanji gongcheng · 2010
This paper proposes an algorithm of Direction of Arrival(DOA) estimation in the Orthogonal Frequency Division Multiplexing(OFDM) system.It uses the priori knowledge of angle between the base stations and the buildings around it with oblique projection operator to estimate the unknown angle based on the Least Squares(LS) ideas of MUSIC algorithm.It is proved that the algorithm is the unbiased estimation only for the unknown angles from the view of theory and simulation.Result is free from the priori information,and it is fit for distinguishing the small difference from the known angle,so it outperforms the traditional MUSIC algorithm.