SCTCM在水声OFDM系统中的应用研究  

The application study of serial concatenated TCM coding technique in UWA communication based on OFDM

作　　者：苏军[1] 乔钢[1] 

机构地区：[1]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《电子技术应用》2008年第4期102-104,共3页Application of Electronic Technique

基　　金：国家"863"资助项目(2006AA09Z105)

摘　　要：针对信道带宽窄、强多途、强噪声干扰等影响水下信息高速、可靠传输的主要障碍,设计了一种适合水声信道的级连网格编码调制技术SCTCM与正交频分复用技术OFDM相结合的传输体制,可有效解决水下高速数据传输的带宽效率和可靠性问题;采用时变衰落、多途和加性干扰的水声信道模型;理论分析和计算机仿真结果表明使用该传输体制的水声通信系统能在数据速率不损失或损失很小但不增加带宽的情况下获得可观的编码增益,系统性能得到明显改善。Narrow bandwidth and strong interference introduced by muhipath and severe noise are the main obstacle of the underwater signal＇s credible and high-speed transmission. This paper considers the performance of Trellis-coded modulation（TCM） together with OFDM to solve the problems of the bandwidth efficiency and reliable in UWA communication; and presents the schemes of serial concatenated Trellis-coded modulation （TCM） and it＇s application in UWA system based on OFDM in detail. The simulation results show that this method gives a further coding gain over the uncoded QPSK. The performance of UWA communication has been improved greatly.

关 键 词：级连网格编码调制 水声通信 正交频分复用 

分 类 号：TN929.5[电子电信—通信与信息系统] TN927[电子电信—信息与通信工程]