WCNNM Algorithm for Wideband DOA Estimation
Ruiyan Du, Fulai Liu, Yajian Cheng · Journal of Physics Conference Series · 2017
This paper presents a novel direction-of-arrival (DOA) estimation method for multiple wideband (WB) signals impinging on a nested array, named as WCNNM algorithm. Making use of the proposed method, the DOA estimation problem can be effectively transformed into a convex nuclear norm minimization problem, by solving it to surrogate to recover the signal component from the observed matrix so that the number of incoming signals and signal subspace can be obtained. By the signal subspace, we can obtain the DOA estimation. Compared with the related works, the presented method can not only improve the DOA estimation performances, such as higher resolution, smaller root-mean-square-error (RMSE), but also increase the maximal number of detectable signals. Simulation results are presented to verify the efficiency of the pro-posed method.