关键词:协同分集; 虚拟天线阵列; 量化信道状态信息; 机会中继选择; 比特利用率
Opportunistic relay selection scheme based on adaptively
quantized channel state information
LI Yan, TANG Lun, CHEN Qian-bin
(Key Laboratory of Mobile Communication Technology, Chongqing University of Posts & Telecommunications, Chongqing 400065, China)
Abstract:In order to deal with the system overhead problem induced by transmit quantized bits of the first hop channel state information for destination to obtain global channel state information, this paper proposed the relay selection scheme based on adaptively transmitting the quantization bits of instantaneous channel state information. In the improved scheme, the candidate relayed transmit the quantized bits of the first hop channel state information only when the instantaneous channel condition was better than the threshold which was set in advance. Simulation result shows that the new scheme can improve the bit utilize efficiency and at the same time has little influence on the bit error rate of the system. Moreover, as the number of candidate relays increases from three to five, the appropriate threshold ranges from 0.267 1 to 0.575 6, this result shows that the improved scheme has robustness performance. ......