水声通信空时联合均衡技术仿真研究  

Simulation of diversity combination for underwater acoustic communication

作　　者：李红娟[1] 孙超[1] 李京华[2] 

机构地区：[1]西北工业大学声学工程研究所,西安710072 [2]西北工业大学电子信息学院,西安710072

出　　处：《声学技术》2006年第4期276-280,共5页Technical Acoustics

摘　　要：针对单传感器接收性能受水声信道衰落特性影响较大的问题,通过判决反馈均衡与分集技术相结合的空时联合均衡,采用快速优化最小均方(FOLMS)算法,实现了分集通信仿真。仿真结果表明,当信道出现衰落时,单通道均衡的效果较差,通过空时联合均衡则可有效提高接收性能。文中还给出了不同输入信噪比及不同分集情况下的计算结果,显示了误码率随分集数目的增加以及支路中衰落路数减少而降低的趋势。In order to cope with fading effects, a joint diversity combination and decision-feedback equalization method is introduced for underwater communications. Simulations based on fast optimized least mean square （FOLMS） algorithm show that single channel equalization in a fading channel gives poor performance while improvement can be achieved through multichannel diversity combination. Results of different SNR and the diversity number show that the bit error rate is decreased with a larger diversity number and a smaller number of fading channels.

关 键 词：衰落 判决反馈均衡 分集 误码率 

分 类 号：TB56[交通运输工程—水声工程]