Diversity Analysis of Distributed Space-Time Codes in Relay Networks with Multiple Transmit/Receive Antennas
Diversity Analysis of Distributed Space-Time Codes in Relay Networks with Multiple Transmit/Receive Antennas
复制标题
DOI：
10.1155/2008/254573
复制
发表时间：
2008
影响因子：
1.9
通讯作者：
Y. Jing;B. Hassibi
中科院分区：
文献类型：
--
作者：
Y. Jing;B. Hassibi
将多天线系统中的空时编码思想应用于无线中继网络中的通信问题，采用分布式空时编码策略，实现中继节点天线的协作分集。本文将分布式空时编码的思想推广到具有多天线节点和衰落信道的无线中继网络中。我们表明，对于一个无线中继网络的天线在发送节点，天线在接收节点，天线在所有的中继节点，提供的相干间隔是足够长的，高信噪比成对错误概率（PEP）的行为，如果和如果，其中是网络消耗的总功率。因此，对于的情况，分布式空时编码实现了最大分集。对于的情况，罚款是一个因素，与相比，变得微不足道时，是非常高的。
The idea of space-time coding devised for multiple-antenna systems is applied to the problem of communication over a wireless relay network, a strategy called distributed space-time coding, to achieve the cooperative diversity provided by antennas of the relay nodes. In this paper, we extend the idea of distributed space-time coding to wireless relay networks with multiple-antenna nodes and fading channels. We show that for a wireless relay network with antennas at the transmit node, antennas at the receive node, and a total of antennas at all the relay nodes, provided that the coherence interval is long enough, the high SNR pairwise error probability (PEP) behaves as if and if , where is the total power consumed by the network. Therefore, for the case of , distributed space-time coding achieves the maximal diversity. For the case of , the penalty is a factor of which, compared to , becomes negligible when is very high.