OFDM水声通信改进频域均衡算法  

Research on the improved frequency-domain equalization algorithm for OFDM underwater acoustic communication

作　　者：冯成旭[1] 罗亚松[1] 刘忠[1] 

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033

出　　处：《西安电子科技大学学报》2013年第5期181-187,共7页Journal of Xidian University

基　　金：多普勒声学全向信标的理论与试验研究资助项目(61101205)

摘　　要：针对传统频域均衡算法的缺点,在对多径效应所造成的影响进行深入分析的基础上,从均衡原理和结构出发,提出一种新型的频域自适应均衡算法.仿真结果证明,新算法能够在较少循环前缀参与情况下,对多径效应进行有效补偿,消除较长冗余前缀造成的不利影响,保证水声通信系统的高速、可靠运行.最后,针对新算法运算量增大的问题,提出可行的简化算法.The traditional OFDM frequency-domain equalization algorithm depends on the long circular prefix to overcome the bad influences caused by multi-path effects in the underwater acoustic channel.But the redundant long prefix is actually a serious waste of energy and bandwidth in underwater systems,which restrains the OFDM signal＇s advantages of high channel utilization greatly.Aiming at the defects of the traditional equalization algorithm,this paper brings forward a new frequency-domain equalization algorithm based on the analysis of the influences caused by multi-path effects and the equalization theory and structure.The results of simulation show that the new algorithm can compensate the multi-path effects efficiently with few circular prefixes and make sure the high-speed and reliability of the underwater acoustic communication system.Finally,based on the amount of computing,a simple algorithm is given.

关 键 词：水声通信 频域均衡算法 正交频分复用 循环前缀 多径效应 

分 类 号：TN929[电子电信—通信与信息系统]