TDD-HSDPA/SA系统链路自适应技术性能分析及改进  

Performance analysis and improvement of link adaptation techniques in TDD-HSDPA/SA system

作　　者：陈书平[1] 堵久辉[1] 王文博[1] 

机构地区：[1]北京邮电大学无线信号处理与网络实验室,北京100876

出　　处：《通信学报》2006年第1期124-131,共8页Journal on Communications

基　　金：国家高技术研究发展计划("863"计划)基金资助项目(2004AA123160);普天信息技术研究院基金资助项目~~

摘　　要：理论分析了链路自适应技术在TDD-HSDPA/SA系统中遇到的信道质量波动较为严重的问题,提出了两种改进方案,通过动态系统级仿真进行了仿真研究,结果表明这两种方案可显著改进系统剩余误块率,并提升系统吞吐量。第一种方案更适用于TDD/FDD系统混合组网的情况,第二种方案适用于TDD系统单独组网的情况。The wireless channel fluctuation resulted from smart antennas in TDD-HSDPA/SA （time division duplexhigh speed downlink packet access / smart antennas） system, which caused traditional link adaptation technologies invalid, was theoretically investigated. Two kinds of novel link adaptation schemes were proposed to deal with this issue. A dynamic system level simulator was established to evaluate the performances of the two schemes. Simulation results indicate that both of them have great improvement in system residual BLER and have certain system throughput gain. The first one suits for the hybrid networking case of TDD and FDD （frequency division duplex） mode, while the second one can serve the case of alone TDD networking.

关 键 词：移动通信 链路自适应 混合自动请求重传 自适应调制编码 智能天线 

分 类 号：TN911[电子电信—通信与信息系统]