一种改进的宽带聚焦波束形成算法  

Improved Broadband Focused Beam-Forming Algorithm

作　　者：毕杨[1] 王英民[1] 陈晓屹[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《计算机仿真》2014年第5期197-200,213,共5页Computer Simulation

摘　　要：研究了宽带聚焦波束形成的优化问题。由于在宽带聚焦波束形成算法中,聚焦矩阵直接决定着波束形成的效果,在确定聚焦矩阵时对初始方向估计的偏差以及选择的聚焦频率都会直接影响到最终的聚焦效果,严重时还会致使算法失效。针对这个缺陷,提出了一种改进的宽带聚焦波束形成算法。通过稳健Capon波束形成算法校正聚焦矩阵,并且利用校正的聚焦矩阵使宽带信号的各个子带信号全部聚焦在确定的最佳聚焦频率上。仿真结果表明,通过改进算法得到的宽带聚焦波束,主瓣更加恒定,旁瓣级更低,验证了算法的有效性。The optimization problem of broadband focusing beam-forming was studied in this paper. Because focusing matrix directly determines the performance of the beam forming in the broadband focusing beam-forming algorithm, the deviation of initial direction estimation in determining the focusing matrix as well as the choice of the focusing frequency all can directly affect the focusing effect, and even lead to algorithm failure. To solve this problem, this paper presented an improved broadband focusing beam-forming algorithm which uses the robust Capon beam- forming algorithm to calibrate the focusing matrix and makes each sub-band signal focusing on the optimal focusing frequency. Computer simulation shows, the broadband focusing beam has more constant main valve and lower side lobe level by using the improved algorithm proposed in this paper, which verifies the validity of the algorithm.

关 键 词：宽带聚焦波束形成 最佳聚焦频率 稳健波束形成算法 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]