Elevated multiplexing and signal space partitioning in the 2 User MIMO IC with partial CSIT
Elevated multiplexing and signal space partitioning in the 2 User MIMO IC with partial CSIT
复制标题
具有部分 CSIT 的 2 用户 MIMO IC 中的增强复用和信号空间划分
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
S. Jafar
中科院分区：
文献类型：
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作者：
Bofeng Yuan;S. Jafar
研究任意天线配置的2用户MIMO干扰信道，在任意水平的部分CSIT下，找出用户2在用户1达到完全无干扰DoF时所能达到的自由度。由于将MIMO（发射器和接收器的多个天线）纳入与部分CSIT相关的信号空间划分方案，目标是获得新的见解。从这项研究中出现的一个有趣的想法是“提升多路复用”，其中信号被分成流，并以更高的功率水平从单独的天线传输，这允许这些信号在一个具有较少空间维度和较低干扰层的接收器上联合解码，而另一个接收器同时能够单独解码这些具有较高干扰层但跨越更多空间维度的信号。通过提升多路复用，我们发现增加发射机天线数量有一个DoF的好处，即使发射机已经有比它期望的接收器更多的天线，并且没有CSIT。
The 2 user MIMO interference channel with arbitrary antenna configurations is studied under arbitrary levels of partial CSIT for each of the channels, to find the degrees of freedom (DoF) achievable by User 2 while User 1 achieves his full interference-free DoF. The goal is to gain new insights due to the inclusion of MIMO (multiple antennas at both transmitters and receivers) into the signal space partitioning schemes associated with partial CSIT. An interesting idea that emerges from this study is “elevated multiplexing” where the signals are split into streams and transmitted from separate antennas at elevated power levels, which allows these signals to be jointly decoded at one receiver which has fewer spatial dimensions with lower interference floors, while another receiver is simultaneously able to separately decode these signals with a higher interference floor but across a greater number of spatial dimensions. Through elevated multiplexing we find that there is a DoF benefit from increasing the number of antennas at a transmitter even if that transmitter already has more antennas than its desired receiver and has no CSIT.