OFDM水声通信改进频域均衡算法

doi:10.3969/j.issn.1001-2400.2013.05.029

J4 ›› 2013, Vol. 40 ›› Issue (5): 181-187.doi: 10.3969/j.issn.1001-2400.2013.05.029

OFDM水声通信改进频域均衡算法

冯成旭;罗亚松;刘忠

(海军工程大学电子工程学院，湖北武汉 430033)

收稿日期:2013-01-18 出版日期:2013-10-20 发布日期:2013-11-27
通讯作者: 冯成旭
作者简介:冯成旭(1986-)，男，海军工程大学博士研究生，E-mail: kerryfengcx@126.com．
基金资助:
多普勒声学全向信标的理论与试验研究资助项目(61101205)

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

FENG Chengxu;LUO Yasong;LIU Zhong

(College of Electronic Engineering, Naval Univ. of Engineering, Wuhan 430033， China)

Received:2013-01-18 Online:2013-10-20 Published:2013-11-27
Contact: FENG Chengxu

摘要/Abstract

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．

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

Abstract:

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.

Key words: underwater acoustic communication, frequency-domain equalization algorithm, OFDM, circular prefix, multi-path effect

冯成旭;罗亚松;刘忠. OFDM水声通信改进频域均衡算法[J]. J4, 2013, 40(5): 181-187.

FENG Chengxu;LUO Yasong;LIU Zhong. Research on the improved frequency-domain equalization algorithm for OFDM underwater acoustic communication[J]. J4, 2013, 40(5): 181-187.

参考文献

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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

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