均匀圆阵下的DOA估计算法研究

irection of arrival estimation always plays an important part in mobile communications. On the basis of uniform circular arrays(UCA) with 8 Direction of arrival estimation always plays an important part in mobile communications. On the basis of uniform circular arrays (UCA) with 8 sensors adopted by the third-generation telecommunication system TD-SCDMA, this paper introduces a 1-D algorithm which takes advantage of interpolated arrays to realize the shifts of the UCA and get DOA estimations. This algorithm can tell two coherent signals. What’s more, the paper also introduces a 2-D DOA estimation algorithm for UCA, which is based on mode space transformation to get 1-D and 2-D DOA estimation. Simulations show that the algorithm based on interpolated arrays works better than UCA-RB-MUSIC algorithm when the signals are coherent in 1-D DOA estimation; while UCA-RB-MUSIC algorithm can realize effective 2-D DOA estimation instead of the algorithm based on interpolated arrays.