基于QRD和SIC检测的多入多出中继网络分布式波束形成方案

摘要：
考虑多天线多中继两跳半双工无线网络，基于AF协议提出了RZF和IRZF MF 2种分布式波束形成方案.在中继节点，前者使用RZF技术进行接收和发射波束形成，后者分别使用IRZF和MF技术进行接收和发射波束形成.仿真结果显示，在瑞利信道下，2种方案与现有的MF RZF方案性能相当；而在莱斯信道下，文中RZF方案性能最优，但需要较高的计算复杂度.相对于除RZF方案的其他方案，IRZF MF实现了系统容量增益，并且其计算复杂度低于RZF方案.
关键词：
多输入多输出； 放大转发中继； 分布式波束形成； 正则化迫零预编码； QR分解
中图分类号： TN 925
文献标志码： A

Distributed Beamforming Schemes Based on QR Decomposition and SIC Detection for MIMO Relay Networks

This paper is concerned with a two hop half-duplex wireless communication network with multiple antennas and multiple relays. Based on amplify and forward (AF) protocol, two new distributed beamforming schemes named IRZF-MF and RZF were proposed for this system. The RZF scheme uses RZF technique for both receive and transmit beamforming while the IRZF-MF scheme uses IRZF and MF technique for receive and transmit beamforming respectively. The simulation results show that the proposed two relay schemes achieve the same performance of existing MF-RZF scheme in the Rayleigh channel, meanwhile, the proposed RZF scheme achieves the best performance which requires a higher computational complexity and the proposed IRZF MF scheme achieves the second best performance while requires less computational complexity than RZF scheme in the Rician channel compared with other existing distributed relaying schemes.Key words：