Parameter estimation based on Schur-Hadamard product beamforming for coherently distributed source
Xin Song · Systems engineering and electronics · 2008
For estimating parameters of local scattering distributed source,according to the symmetry assumption of angular signal intensity,the steering vector is deduced to be a Schur-Hadamard product comprising the steering vector of the point source and a real matrix for coherently distributed source.And then beamforming algorithm based on Schur-Hadamard product is proposed for estimating parameters-the central direction of arrival(DOA) and angular spread.The angular spread parameter is considered in the constraint,so the proposed algorithm is robustness,and can be applied to the scenarios where angular spread is large.Simulations clearly demonstrate that the algorithm enjoys better signal-to-noise ratio performance and improved precision compared with DSPE algorithm,and is more suitable for complicated environment.