矢量水听器阵列MVDR波束形成器的性能研究

Performance of MVDR in vector hydrophone array

针对矢量水听器阵列的最佳阵处理,研究了高斯背景噪声条件下MVDR波束器的输出性能,给出了系统输出信干噪比与各影响参数之间的解析关系式,并对三种典型情况进行了具体探讨,着重分析了信噪比、干扰强度、相关系数和样本长度对系统输出SINR的影响,证明了低信噪比时MVDR波束形成器为最佳空域滤波器,分析还表明,MVDR波束形成器对强信号存在抑制现象,高信噪比时输出的SINR为一常数。计算机仿真结果证明了理论分析的正确性。

The output performance of MVDR in the vector hydrophone array applications is studied in this paper. Theoretical analysis gives the relations between SINR and the parameters of consequence, Three typical cases are exploited in which are analyzed the influences of SNR, SIR, the correlation coefficient, and snapshots. It is proved that in the small SNR scenario, MVDR beamformer is the optimal spatial filter. It is also shown that the MVDR beamformer suppresses the signal at high SNR, and the output SINR is a constant. The simulations verify the correctness of the theoretical analysis.