CSEE 2011: Advances in Computer Science, Environment, Ecoinformatics, and Education pp 348-353 | Cite as
DOA Estimation of UCA Based on Reconstructing Matrix
Abstract
A decorrelation algorithm UCA-TOEP for DOA estimation of uniform circular array (UCA) is proposed. After mode excitation method being used to change UCA into virtual uniform linear array, a special Toeplitz matrix is reconstructed in UCA-TOEP algorithm, and then DOA is estimated with MUSIC algorithm. Thus DOA of coherent signals could be effectively distinguished. Compared to virtual spatial smoothing algorithm, computation of UCA-TOEP is reduced and UCA-TOEP is with better performance in the condition of low SNR and few snapshots. Simulation results show that UCA-TOEP algorithm is feasible and it has better performance than spatial smoothing algorithm.
Keywords
DOA estimation uniform circular arrays coherent signals UCA-TOEP spatial smoothingPreview
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