Aiming at these problems, an improved algorithm based on signal classification (MUSIC) algorithm is proposed, which is based on the traditional four order multiple. According to the rule of the four order accumulation matrix, the algorithm removes the data redundancy of the original four order cumulative quantity matrix, effectively reduces the computation time, and provides the necessary conditions for its practical application. The simulation results show that the improved algorithm can quickly realize the virtual array expansion, and it can also restrain the colored Gauss noise.

4ordermusic11.m

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