Research on the Root-MUSIC Spatial Spectrum Estimation Algorithm in the Presence of Gain-phase Errors
WANG Jiachi
Abstract：This paper presents a spatial spectrum estimation algorithm of Root-MUSIC in the presence of gain-phase errors.The root-finding method is used to get DOA without the spectral peak searching,which not only reduces the spectral peak search time and complexity of the algorithm,but also has better spatial spectrum estimation accuracy than the conventional algorithm in the case of low signal-to-noise ratio.An alternating iterative algorithm is adopted to adaptively calibrate the gain-phase errors of the channels,making the amplitude error less than 0.5 dB and the phase error less than 1 degree,which ensures the accuracy of the spa-tial spectrum estimation.The algorithm can be applied to the direction-finding equipment on unmanned aerial vehicles.Theoretical analysis and computer simulation show that this algorithm has higher spectrum estimation accuracy compared with conventional algo-rithms such as Capon and MEM.
Keywords：DOARoot-MUSIC(Root Multiple Signal Classification)spatial spectrum estimationsuper-resolution
Publication Date：2025-12-20
Online Publishing Date：2026-03-23(First online date of this platform, not the publication date of the document)
Pages：5( 79-82,174 )