Estimation Method of DOA for DS-UWB Signal

Direction of Arrival (DOA) estimation is one of the key technologies of Direct Sequence Ultra Wide Bandwidth (DS-UWB) system. The traditional DOA estimation methods which are based on narrow-band signals are not suited for such system. So a fourth-order cumulant-based estimation method of DOA is proposed. This method is founded on the frequency domain model of DS-UWB array signals. The spatial spectral function is then derived for analysis. The performance of the estimation algorithm is evaluated by computer simulation and the results show that the algorithm is effective and can guarantee adequate estimation accuracy.