摘要
为了使多天线中继在空时分组码协作发送过程中既可以实现全速率又能获得较高分集增益,提出了一种将中继间空时分组码协作与单个中继的多天线波束成形相结合的多天线中继空时分组码协作机制.中继采用正交频分复用传输,相同载波上的符号由不同中继通过空时分组码协作进行转发,同一中继内的天线间进行波束成形.此外,为了降低信道反馈开销,设计了一种适合多天线中继空时分组码协作机制的有限速率反馈机制.仿真结果表明:文中所提多天线中继空时分组码协作机制在获得全速率的同时,用户端采用空时分组码译码算法就可同时获得由中继间空时分组码协作和中继内多天线波束成形带来的分集增益,且采用所提有限速率反馈机制可在损失较小系统性能的情况下显著降低信道反馈开销.
In order to obtain the full rate and increase the diversity gain for multi-antenna relay space time block coded（STBC） cooperation,we combine relay STBC cooperation with the single relay＇s multi-antenna beam forming（BF） and propose a multi-antenna relay STBC cooperation（MARSC） scheme.The relay adopts orthogonal frequency division multiplexing（OFDM） for transmission,symbols in the same carriers are forwarded by the relay STBC cooperation,and BF is executed between antennas of the relay.Furthermore,we design a suitable finite rate feedback scheme to reduce the channel feedback overhead.Simulation results show that the proposed MARSC scheme can obtain the full rate and the high diversity gain which is brought by STBC cooperation and the relay＇s multi-antenna at the same time,when the user just employs the STBC decode algorithm,and that the proposed finite rate scheme can significantly reduce the channel feedback overhead with a smaller system performance loss.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2010年第2期334-339,共6页
Journal of Xidian University
基金
国家自然科学基金资助项目(60772110)
中央高校基本科研业务资助项目(BUPT2009RC0113)
关键词
协作中继
空时分组码
波束成形
多输入多输出
正交频分复用
有限速率反馈
cooperative relay
space time block code
beam forming
multiple input multiple output
orthogonal frequency division multiplexing
finite rate feedback
