多输入多输出浅海水声信道响应的盲估计

Blind Estimation of Multi-inputs and Multi-outputs Shallow-Water Acoustic Channel

提出一种在频率域实现的MIMO(multi-inputs multi-outputs)盲解卷积算法,可以在较低信噪比下求解得到浅海水声信道冲激响应的逆滤波器响应,不受时间域的原始信道阶数很长且稀疏的影响,经过求逆后得到原始MI-MO浅海水声信道的冲激响应.最后采用合理的声场仿真模型验证了算法的有效性.

A frequency domain method for the blind multi-inputs multi-outputs （MIMO） underwater deconvolution is developed to estimate the original acoustic channel from received signals on hydrophones only,with the low signal to noise ratio （SNR）. The method is not influenced by a long impulse response order and sparse underwater acoustic channel in time domain. By inversing the blind deconvolution result, the origin MIMO channel impulse response can be obtained. The results based on simulation model of underwater acoustic field prove this work to be effective and efficient for blind estimation of the shallow-water acoustic channel.