基于舷侧阵的MVDR波束形成算法研究

针对鱼雷舷侧阵的方位估计,研究了阵元域MVDR波束形成算法,此算法较常规波束形成算法在分辨能力上已有了很大的提高,但阵元域MVDR是对阵元域的信号直接处理,计算量较大,在低信噪比时分辨能力下降,限制了其在声纳系统上的应用.文章提出的波束域MVDR(BMVDR)波束形成算法就是为了克服阵元域MVDR的缺点.通过理论分析及计算机仿真,表明BMVDR算法的性能优于MVDR与常规波束形成(CBF).

Research of MVDR beam forming algorithm based on flank arrays

In view of the orientation estimation of the torpedo flank arrays, the MVDR beam forming algorithm is investigated in element domain in the paper. The algorithm is much better than that of the CBF in resolution. For the MVDR, the element domain signal is directly processed and therefore the calculation capacity is very large and its resolution decreases under low SNR, which limits its application to sonar systems. The paper brings forward beam space MVDR (BMVDR) method in order to overcome the disadvantages of the element space MVDR. The theoretical analysis and computer simulations results indicate that the performance of BMVDR is better than MVDR and CBF.