一种用于多径衰落水声信道的盲均衡算法研究

信道均衡是现今高速水声通信系统中克服码间干扰一项关键技术，如何提高均衡器的性能是目前研究的热点课题。针对水声信道的时变多普勒特性，在分析信道模型及盲均衡器结构特点的基础上，提出了一种时域解相关的变步长恒模算法，并对算法进行了仿真及试验分析。结果表明改进算法能够有效克服实际水声通信中的码间干扰效应，具有更快的收敛速度和更小的剩余误差，提高了浅海水声通信的有效性和可靠性，具有广阔的工程应用前景。

A Novel Blind Equalization Algorithm for Multipath Fading Underwater Acoustic Channel

The equalization of channels is a key technique for conquering ISI in modem underwater acous tics communication system, and how to improve the performance of equalizers becomes a hot topic. Towards to the time-varying Doppler underwater acoustic channel and based on analysis of the structure characteris tics of the channel model and the blind equalizer, the paper proposes an algorithm of variable step size re lated constant modulus algorithm and makes an analysis of the algorithm simulation and test. The results indicate that the improved algorithm can effectively overcome the practical underwater acoustic communication inter-symbol interference effect, and has the faster convergence speed and smaller residual error, thus to improve the effectiveness and reliability of the shallow water acoustic communication, and then would have a wide application prospect.