High-speed DOA estimation using beam-space SRQ
Wu Ying · Radio and communications technology · 2006
Recently, SRQ has been used to estimate the direction of arrivals (DOA) accurately. However, this method requires large calculation time for eigen-decomposition of the covariance matrix. This paper presents a high-speed DOA estimation based on the beam-space SRQ, which can reduce the order of the covariance matrix. The proposed method implements two-step DOA estimation. The first step is the coarse estimation in which the DOA are roughly estimated. The second step is the fine estimation in which the result of the coarse estimation is exploited and DOA are accurately estimated. The simulation results showed that the proposed method is an effective technique for reducing the calculation time for eigen-decomposition. Therefore , this method is an effective technique for real-time DOA estimation.