MUSIC Algorithm of Beam Null Forming on Linear Array of Bi-static Sonar

With the linear array assumption of R-static,a beam null forming algorithm based on multi-signal classification(MUSIC) tech was proposed.On the basis of shielding the strongly direct wave interference from T-static,the target echo signal can be received by the algorithm.The influences of intension and DOA of direct wave interference on the algorithm performance were also discussed.The improved MUSIC beam null forming algorithm was also proposed.The perfect interference suppression ability can be obtained by the improved algorithm at a tiny DOA deviation caused by the interference in the R-static.