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It has proved that the improved TLS-ESPRIT algorithm is more accurate than the TLS-ESPRIT algorithm in DOA estimation such as azimuth and elevation estimation at different SNR through experiments. The improved algorithm can show its superiority especially under the condition of the low SNR, its variance and root-mean-square are lower than that of the original algorithm. However, which is more superior of two algorithms when the number of sub array element is actually the same. This paper uses MATLAB to demonstrate the performance of the improved algorithm with M array and the original algorithm with M+1 array to show the performance of the both at the different SNR cases. And it also points out the deficiency of the improved algorithm and its theoretical basis is presented through analysis.

Improved TLS-ESPRIT Algorithm Research for Uniform Line Array