摘要
针对多载波调制(MCM)传统频域均衡算法对水声信道变化跟踪能力差的缺点,提出了一种基于判决反馈结构的频域自适应均衡算法,并在此基础上对新算法的运算量进行了分析,针对新算法运算量大的问题,对其进行了简化.在信道不变和信道时变情况下分别对算法进行了仿真验证,结果表明,在具有较高信噪比的情况下,新的均衡算法较传统算法能更有效地跟踪信道变化,并且具有更好的误码率性能,同时简化的算法能在保证误码率性能损失不大的基础上,大大减少运算量,具有较高的应用价值.
The defects of traditional frequency-domain equalization algorithm for multi-carrier modula- tion （MCM） are considered. A new frequency-domain equalization algorithm using decision feedback structure is proposed and simplified. All the algorithms are checked by simulations whether the chan- nel is changeless or time is varying. Results of simulation show that in the environment where SNR level is relatively higher, the new algorithm possesses a stronger capability of tracking and lower baud error rate, and also the simpler algorithm can reduce the amount of computing effectively.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第3期19-21,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家高技术研究发展计划资助项目(2007AA01Z309)
关键词
水声通信
子载波组
多载波调制
判决反馈均衡算法
多径效应
underwater acoustic communication
subcarrier-cluster
multi-carrier modulation~ equali- zation algorithm based on decision feedback structure~ multipath effect
