多天线物理层网络编码
Physical layer network coding with multiple antennas
摘要：
两阶段MIMO NC（网络编码）方案可以用来提高吞吐量的双向中继信道中，节点配备有多个天线。显而易见的策略是中继节点从两个端节点提取各个分组，并将两个分组混合以形成网络编码分组。在本文中，我们提出了一种新的方案，称为MIMO PNC（物理网络编码），其中中继提取的总和和差异的两端包，然后将它们转换为网络编码的形式。MIMO PNC是单天线PNC方案和线性MIMO检测方案的自然组合。MIMO PNC的优点很多。首先，它消除了单天线PNC中严格的载波相位要求。第二，它是线性复杂度相对于星座的大小和在MIMO中的同时数据流的数量。仿真结果表明，在随机瑞利衰落信道下，MIMO PNC的性能明显优于直接MIMO NC。基于我们的分析，我们进一步推测，MIMO PNC优于MIMO NC下的所有可能实现的信道。
英文摘要：
The two-phase MIMO NC (network coding) scheme can be used to boost the throughput in a two-way relay channel in which nodes are equipped with multiple antennas. The obvious strategy is for the relay node to extract the individual packets from the two end nodes and mix the two packets to form a network-coded packet. In this paper, we propose a new scheme called MIMO PNC (physical network coding), in which the relay extracts the summation and difference of the two end packets and then converts them to the network-coded form. MIMO PNC is a natural combination of the single-antenna PNC scheme and the linear MIMO detection scheme. The advantages of MIMO PNC are many. First, it removes the stringent carrier-phase requirement in single-antenna PNC. Second, it is linear in complexity with respect to the constellation size and the number of simultaneous data streams in MIMO. Simulation shows that MIMO PNC outperforms the straightforward MIMO NC significantly under random Rayleigh fading channel. Based on our analysis, we further conjecture that MIMO PNC outperforms MIMO NC under all possible realizations of the channel.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
