Wideband DOA Estimation Algorithm Based on Signal Subspace Rebuilding
Zhiqiang Liu, Hongguang Ma, Jian Yang · 2017
A new direction-of-arrival (DOA) estimation algorithm based on signal subspace rebuilding (SSR) is proposed for wideband sources.In the proposed algorithm, the signal subspaces are filtered by SSR to reduce the effect of the direction vectors of nonsupposed directions.The signal subspaces of each frequency bin are focused and averaged to enhance the Signal-to-Noise Ratio (SNR) of signal subspace.Therefore the quality of spatial spectrum is enhanced.The algorithm does not require initial estimation of the DOAs.The performance of some wideband algorithms is compared with that of the algorithm through computer simulations.The simulation results show that the proposed algorithm has a higher resolution with lower bias and variance than other wideband algorithms.