摘要： 为提高移动通信系统的能量与频谱效率,基于放大转发协议,提出一种多用户全双工大规模多入多出中继协作方案。对频谱和能量效率进行研究,获得系统中每一对用户间各态历经速率下界的封闭解析解以及系统的频谱、能量效率。分析系统在不同能量分配场景下对环路干扰的抑制效果和渐近性能。实验结果表明,当中继收或发天线数足够大时,系统能有效地消除小规模衰落和多用户干扰,其渐近频谱效率和能量效率将达到一饱和稳定值。当采用信源发功率固定、中继发功率与中继发天线数成反比的功率分配方案时,系统可有效地抑制环路干扰。

关键词: 全双工, 大规模多入多出, 放大转发, 频谱效率, 能量效率

Abstract: In order to enhance the spectrum and energy efficiency of mobile communication system,a Full-duplex(FD) Massive Multiple-input Multiple-output(MIMO) relaying system is proposed,in which the Amplify-and-forward(AF) relaying protocol is employed.For such Massive MIMO AF relaying scheme,the paper obtains the closed-form expression of the lower bound of the achievable ergodic rate for each user pair.With the derivations,the total spectrum and energy efficiency is achieved.To obtain more insights such as loop interference suppression,the asymptotic performance is performed by considering different power-scaling schemes.Experimental results show that the small-scale fading and inter-pair interference are canceled effectively when the number of the receiving or transmitting antenna grows to infinity,such that the spectrum and energy efficiency is saturated to a constant.At the same time,the loop interference imposed by FD mode is eliminated perfectly when the transmission power at source is fixed and the one at relay is scaled by the reciprocal of the number of transmitting antennas at relay.

Key words: Full-duplex(FD), Massive Multiple-input Multiple-output(MIMO), Amplify-and-forward(AF), spectrum efficiency, energy efficiency

中图分类号: 

• TP391