并列式多入多出声纳宽带高分辨波束形成方法

摘要

并列式多入多出(Multiple-Input Multiple-Output,MIMO)声纳可以通过高分辨波束形成方法进一步提高方位分辨能力.本文通过对窄带方法的扩展,提出一种宽带高分辨波束形成的方法,数值仿真分析了该方法的性能,并通过湖试数据进行了验证.结果表明,该方法可以对并列式MIMO声纳进行宽带高分辨波束形成,高信噪比情况下可以得到较高的方位分辨能力,但方位分辨力随信噪比减小下降较快,且运算量远大于常规波束形成方法,在运算能力满足要求且信噪比较高时,用本方法可显著提高系统的方位分辨性能.%A high steering resolution can be obtained by using the high-resolution beam forming method for collocated multiple-input multiple-output (MIMO) sonar.Based on narrow-band methods, a broadband high-resolution beam forming method is proposed.The performance of the method is analyzed with numerical simulation, and is validated with lake experiments.The results show that the broadband high-resolution beam forming method is effective to the collocated MIMO sonar and a high steering resolution is achieved in high signal-to-noise ratio (SNR) conditions.The resolution decreases with the SNR reductions.The computations of the method are much larger than the ones for conventional beam forming methods.The proposed method may be employed for improving the steering resolution of a system in high SNR conditions when computation capacities are satisfied.