【摘要】 在水下通信中,要求提供高速率和高可靠性的通信服务,而正交频分多路复用(OFDM)因具有频带利用率高和抗多径能力强等优点,近年来受到广泛的重视。文中主要研究在采用梳状导频图案的OFDM水声通信系统中,利用DFT变换的方法来实现信道估计,并结合水声通信系统模型对此算法进行了计算机仿真。仿真结果表明该方法在提高计算效率的同时获得了很好的性能,因此非常适用于实时高速水声通信系统。更多还原

【Abstract】 The channel estimation is one of the key technologies in communication transmission field,and affects the performance of the communication system.In this paper,DFT-based channel estimator is used for investigating the orthogonal frequency division multiplexing(OFDM) underwater acoustic communication system based on comb-pilot pattern.Simulations results show that the method has a good performance and low computational complexity in the underwater acoustic communication.Therefore,DFT-based channel estimator has a good application prospect for real-time and high rate underwater acoustic communication.更多还原