时域矢量阵宽带恒定束宽波束的形成方法研究

对于海底探测和分类问题的声呐系统来说,一般要求声呐系统具备在较宽频带内形成恒定束宽波束的能力。随着对矢量水听器认识的深入,开展基于矢量阵的恒定束宽波束形成器的研究越发变得必要。介绍了在时域矢量阵宽带恒定束宽波束形成的实现原理和设计方法,并以均匀等间距线阵为例,给出了时域恒定束宽算法的实现流程。通过计算机仿真,可以看到基于矢量阵得到的恒定束宽波束要比常规阵得到的恒定束宽波束性能好得多。系统的可行性得到验证。

A Method for Time Domain Wideband Beamforming with Constant Beamwidth Using Vector Arrays

The sonar system must contain a beamformer within the wide frequency domain when it is used to explore the sea bottom and to identify underwater objects.In the further study on the vector hydrophones,it is necessary to investigate the constant beamwidth beamforming using vector arrays.The implementation scheme and design method are introduced for the time domain wideband beamforming with the constant beamwidth using vector arrays.Using the uniform linear array,a time domain implementation of the algorithm is proposed.The performance of beam pattern with constant beamwidth using vector arrays is better than that of beam pattern with constant beamwidth using conventional arrays through the computer simulation.