When Alamouti codes meet interference alignment: Transmission schemes for two-user X channel
When Alamouti codes meet interference alignment: Transmission schemes for two-user X channel
复制标题
DOI：
10.1109/isit.2011.6034034
复制
发表时间：
2011-10
期刊：
影响因子：
--
通讯作者：
Liangbin Li;H. Jafarkhani;S. Jafar
中科院分区：
文献类型：
--
作者：
Liangbin Li;H. Jafarkhani;S. Jafar
干扰对齐在X信道的复用增益方面增加了传输速率。在本文中，我们提出了一个固定速率的传输方案，在两个用户的X信道中的两个双天线发射机有独立的消息的两个双天线接收机。每个发射机使用Alamplitude码对符号进行编码，然后使用波束形成器对准非预期接收机处的干扰。接收器去除对齐的干扰，并使用干扰消除来对符号进行重排序，然后进行逐符号解码。我们的分析表明，该方案实现了2的分集增益在最大节点到节点的符号率为2比3。
Interference alignment increases transmission rate in terms of multiplexing gain for X channel. In this paper, we propose a fixed-rate transmission scheme over a two-user X channel where each of the two double-antenna transmitters has independent messages for each of the two double-antenna receivers. Each transmitter encodes symbols using Alamouti codes followed by beamformers that align interference at unintended receivers. The receiver removes the aligned interference and decouples symbols using interference cancellation followed by symbol-by-symbol decoding. Our analysis shows that the proposed scheme achieves a diversity gain of 2 at the maximum node-to-node symbol-rate of 2 over 3.