全双工大规模MIMO中继频谱效率研究

Spectral Efficiency for Full-Duplex Massive MIMO Relaying

研究全双工大规模MIMO中继系统,其中多个信源和信宿在一个全双工中继的协助下通信。假设信源和信宿装配单天线,而基站装配大规模天线阵列。当基站采用最大比接收/最大比发送(Maximal Ratio Reception/Maximal Ratio Transmission,MRC/MRT)时,利用随机矩阵方法推导了系统在不同功率伸缩方案下的频谱效率渐近表达式。理论结果表明,选择适当的功率伸缩因子,可消除全双工自干扰的影响,而仿真结果也验证了理论分析的正确性。

This paper discusses the full-duplex massive MIMO relaying system, with which muhiple source- destination pairs communicate simultaneously via a common full-duplex decode-and-forward relay. Assuming that the sources and destinations are equipped with single antenna which the relay with very large antenna arrays, the asymptotic spectral efficiency performance is analyzed under the general power scaling scheme, when maximal ratio reception/maximal ratio transmission （MRC/MRT） scheme is employed at the relay. Theoretical results indicate that the effect of echo interference due to full-duplex operation could be eliminated by the large antenna arrays of the relay, if the power scaling scheme is properly selected.