基于同态滤波的水声时延估计算法研究

Study on Homomorphic Filtering Underwater Acoustic Delay Estimation Algorithm

针对水声信道的多径扩展特性和稀疏性,和海洋介质的多重散射和不均匀性,同态滤波技术可以在变换域将卷积转化为加法的操作进行处理,非常适合水声信道.主要对水声信号在倒谱域进行处理,通过信道冲激响应作为衡量的标准,给出了有益的结论,为更进一步的研究奠定了基础.

Aiming at the sparse and multi-path spreading property of underwater acoustic channel, multiple scattering and non-uniform characteristic of sea media, homomorphic filtering technology can process by converting correlation to addition, which can satisfy underwater acoustic channel. The underwater acoustic signal has been disposed in invert frequency domain in this paper. The benefit result can be concluded through channel impulse response as a standard, the foundation of further study has been established.