Space-time diversity enhancements using collaborative communications
Space-time diversity enhancements using collaborative communications
复制标题
DOI：
10.1109/tit.2005.847731
复制
发表时间：
2005-06
影响因子：
2.5
通讯作者：
P. Mitran;H. Ochiai;V. Tarokh
中科院分区：
文献类型：
--
作者：
P. Mitran;H. Ochiai;V. Tarokh
众所周知，空间维度的使用可以极大地提高准静态(即，非遍历)无线信道的可靠性。文中证明了当只有一个接收代理时，这种增益的大部分也可以通过与单天线/多天线节点的协作通信来实现。具体地，对于单天线情况，通信被认为发生在附近节点的集群之间。证明了协作编码的存在，对于该协作编码，其簇内协商惩罚原则上是小的(并且几乎所有传统空时编码的分集增益都可以实现)。例如，对于具有两个协作器和一个接收器节点的单个发射器节点，如果协作器比接收器具有低至10db的路径损耗优势，则协作相对于传统空时系统的损失可以忽略不计。
The use of the spatial dimension is known to greatly increase the reliability of quasi-static (i.e., nonergodic) wireless channels. In this paper, it is demonstrated that most of this gain can also be achieved through collaborative communications with single-antenna/multiple-antenna nodes when there is one receiving agent. In particular, for the single-antenna case, communication is considered to take place between clusters of nearby nodes. The existence of collaborative codes for which the intra-cluster negotiation penalty is, in principle, small (and almost all the diversity gain of traditional space-time codes may be realized) is shown. For example, for a single transmitter node with two collaborators and one receiver node, if the collaborators have as little as a 10-dB path loss advantage over the receiver, the penalty for collaboration over traditional space-time systems is negligible.