基于频域分解的水声信号宽带盲波束形成

盲波束形成算法可以在不知道阵的流型、信号及干扰方位的情况下,仅根据各阵元接收的数据恢复信号。由于水声信号为宽带信号,为了充分利用宽带信息,提出利用频域分解的方法获得满足窄带条件的信号,并利用窄带盲波束形成JADE（Joint Approximate Diagonalisation of Eigen-matrices）算法进行处理。对宽带盲波束形成算法进行了理论推导和仿真实验。研究结果表明,盲波束形成算法相对于常规波束形成在信号恢复方面有优越性。

Blind beam-forming for broadband underwater acoustic signal

The desired signals can be reconstructed from the received sonar data without prior information by the blind beam-forming technique. In order to make full use of wide-band information, frequency decomposition technique is raised to get narrow-band signal from broadband signal. Then blind beam-forming algorithm named JADE is utilized to process the signal acquired. In this paper the algorithm is proved theoretically and examined through simulated data. Results show validity of the assumption. The blind beam-forming algorithm outperforms the conventional one.