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A method of DOA Estimation by Modified MUSIC Algorithm

Peng Zhao

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Abstract

The estimation of direct of arrival (DOA) is the main study of spatial spectrum estimation, MUSIC algorithm is the most classics DOA estimation. Music algorithm can estimate independent signals’ DOA effectively and reach the infinite precision under the premise that the model is proper, but it is ineffective to coherent signals and adjacent signals with small SNR, The estimation performance of MUSIC algorithm will gradually deteriorate and even total failure. Through the discussion of traditional DOA estimation based on MUSIC algorithm, a method of DOA estimate based on MUSIC algorithm with spatial smooth technology was proposed. The simulation result shows that Forward/Backward Spatial Smoothing can estimate the DOA of coherent signals, and the incisive spectrum peak and the high resolution for coherent source are obtained by using the Forward/Backward Spatial Smoothing.

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What this paper is about

The estimation of direct of arrival (DOA) is the main study of spatial spectrum estimation, MUSIC algorithm is the most classics DOA estimation. Music algorithm can estimate independent signals’ DOA effectively and reach the infinite precision under the premise that the model is proper, but it is ineffective to coherent signals and adjacent signals with small SNR, The estimation performance of MUSIC algorithm will gradually deteriorate and even total failure. Through the discussion of traditional DOA estimation based on MUSIC algorithm, a method of DOA estimate based on MUSIC algorithm with spatial smooth technology was proposed. The simulation result shows that Forward/Backward Spatial Smoothing can estimate the DOA of coherent signals, and the incisive spectrum peak and the high resolution for coherent source are obtained by using the Forward/Backward Spatial Smoothing.

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Available abstract

The estimation of direct of arrival (DOA) is the main study of spatial spectrum estimation, MUSIC algorithm is the most classics DOA estimation. Music algorithm can estimate independent signals’ DOA effectively and reach the infinite precision under the premise that the model is proper, but it is ineffective to coherent signals and adjacent signals with small SNR, The estimation performance of MUSIC algorithm will gradually deteriorate and even total failure. Through the discussion of traditional DOA estimation based on MUSIC algorithm, a method of DOA estimate based on MUSIC algorithm with spatial smooth technology was proposed. The simulation result shows that Forward/Backward Spatial Smoothing can estimate the DOA of coherent signals, and the incisive spectrum peak and the high resolution for coherent source are obtained by using the Forward/Backward Spatial Smoothing.

Key concepts: Smoothing, Computer science, Multiple signal classification, Algorithm, Direction of arrival, Estimation, Speech recognition, Telecommunications

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