交替投影盲反卷积的阵不变量被动定位*

本文针对低信噪比下传统盲反卷积技术提取格林函数过程中存在的图像模糊问题,提出了一种基于交替投影法的阵不变量浅海被动定位方法。该种方法利用交替投影的方法对波束信号进行分离,并利用分离出的波束分别提取格林函数。最后通过补偿时延的方式将多组波束提取的结果相干组合起来,实现格林函数的多波束联合估计。通过仿真实验证明了该方法有效增强了提取格林函数的强度,使得在低信噪比下利用阵不变量的连续声源定位方法更加稳健。

Performance of array invariant processing using blind deconvolution by alternating projection

In this paper, the maximum likelihood estimation method of alternating projection is applied to the cascade of blind deconvolution and array invariant,which is in order to solve the problem of Green"s function image blurring in the process of original RBD method. By compensating the time delay, the multiple Green"s functions obtained from those separated multipath signals are coherently combined. This method take advantage of enhancement of Green"s function to improves the location accuracy of array invariant effectively, and makes the location method of continuous sound more robust.