中文摘要：

为了进一步提高水声OFDM通信系统的性能。本文主要研究了水声OFDM通信系统中基于维纳滤波的信道估计算法．该算法结合了水声信道的特点．采用梳状导频图案，对传统的LS算法进行了改进．在完成计算机仿真的基础上，该算法还在实际的水声信道——厦门大学实验水池和厦门港浅海域进行实验．实验结果表明，该信道估计算法具有较好的精确度和稳定性，能够有效提高水声OFDM通信系统的性能．

英文摘要：

In order to improve the performance of the underwater acoustic orthogonal frequency division multiplexing （OFDM） communication system, a method of channel estimation for underwater acoustic OFDM communication systems based on wiener filter was presented. Considering the characteristics of the underwater acoustic channels, we use comb-pilots in our systems. The algorithm is an improvement of the traditional LS method. Computer simulation has been implemented and it has been tested in real Underwater acoustic channels-the experimental pool in Xiamen University and in shallow water near Xiamen. The experimental result shows that the method presented here can improve the performance of the underwater acoustic OFDM communication system because of its validity and reliability.