嵌套阵恒定束宽宽带波束形成技术研究

Research on Broadband Beamforming with Nested Array and Constant Beam Width

针对宽频带水声传感器阵列的指向性接收问题,分析了目前常见的几种实现方法的优缺点。在此基础之上,针对运算量和带宽指标等方面进行重点优化设计,提出了一种嵌套阵时域恒定束宽宽带波束形成方法,实现了3个倍频程带宽内的水声通信信号接收。经过9元嵌套线阵的仿真验证,其处理速度、接收信号畸变都满足设计和使用需求。

Aiming at the directional receiving problem of wideband underwater acoustic communication sensors,the advantages and disadvantages of several common implementation methods are analyzed. From the perspective of practical engineering application,the resource constraints and countermeasures faced in the directional reception of wideband underwater acoustic communication signals are analyzed. On the basis of several existing implementation methods,taking 9-element nested linear array as an example,the key optimization design is focused on the calculation amount and bandwidth index,and a broadband beamforming with constant beam width in the time domain of nested array. The method realizes the reception of underwater acoustic communication signals within 3 octave bandwidths. After simulation verification,its processing speed and received signal distortion all meet the design and use requirements.