联合自适应调制编码与ARQ的跨层设计  

Cross-layer Design in Combining of Adaptive Modulation and Coding with Truncated ARQ

作　　者：曾端阳[1] 宋荣方[1] 

机构地区：[1]南京邮电大学通信工程系,南京210003

出　　处：《无线通信技术》2007年第2期1-6,共6页Wireless Communication Technology

基　　金：国家自然科学基金(60572130);东南大学移动通信国家重点实验室开放研究基金(N200603)资助

摘　　要：为了提高无线系统数据速率,目前广泛地采用物理层自适应调制编码(AMC)和链路层自动重发请求(ARQ)协议相结合的跨层设计,这种设计方法能大大提高系统频谱利用率。本文在瑞利衰落信道模型下,在给定包时延和丢包率的情况下,推导出了联合AMC和ARQ的跨层设计频谱利用率的公式。同时也与纯AMC和纯ARQ的情况作了比较。The cross-layer design in combining of adaptive modulation and coding with truncated ARQ is now extensively adopted to enhance data rate in wireless communication systems, which increases spectral efficiency greatly. In this paper, a closed-form spectral efficiency expression is derived for combining of adaptive modulation and coding with truncated ARQ, under prescribed packet delay and probability of packet loss over Rayleigh fading channels. And it is also compared with that in the situation of AMC-only and ARQ- only.

关 键 词：自适应调制编码 自动重发请求 跨层设计 频谱利用率 

分 类 号：TN92[电子电信—通信与信息系统]