摘要
协作分集不仅能提升数据传输速率,还可以提高数据传输的稳定性。协作通信方法使用带有一根天线的移动台,在多用户环境中可以共享其他移动用户的天线,这样可产生多根虚拟发射天线,进而得到相应的分集增益,改善移动通信系统的性能。现在通过研究发现,在多中继协作通信中,非对称信道采用放大转发方式下的中继传输,在AF重复转发和机会转发2种方式下表现出了较小的链路中断概率,系统性能得到明显的提升。
Cooperative diversity could promote data transmission rate and improve the stability of data transmission. Cooperative communication takes a mobile platform with an antenna, which shares other mobile users＇ antenna in a multi-user environment, thus to produce multiple virtual antennas obtain corresponding diversity gain and improve the performance of mobile communication system. The study indicates that in umulti-relay cooperative communication, asymmetric channel, with relay transmission in amplify-and- forward（AF） mode, exhibits fairly low link outage probability under repetition-based relay and opportunistic relay, thus resulting in remarkable improvement of the system performance.
出处
《通信技术》
2012年第1期72-74,77,共4页
Communications Technology
基金
苏州市创新创业领军人才项目(No.ZXRC0938)
关键词
协作通信
中继转发
链路中断
cooperative communication
relay-and-forward
outage probability
