同步协作中继系统的波束形成通信方案的设计

Beamforming communication scheme design for synchronous cooperative relay systems

从多输入多输出(multiple-input and multiple-output,MIMO)系统所设计的Alamouti码中得到启发,针对在无线协同信道之上的同步协作中继系统提出了一种新的通信方案。为了在大中断率和低成对误码率(PEP)的情况下能有效地传送信号,源天线采用功率分配波束形成技术,中继节点采用放大转发(amplify and forward,AF)技术。研究和仿真表明,对给定效率R,所提出的模型与以前的通信方案尤其是广播通信模型相比,在中断率和成对误码率上都有明显的改善。这一发现可能会对未来的同步协作中继通信系统的设计有显著的影响。

Inspired by the designation of Alamouti code for MIMO system,this paper proposed a novel communication scheme for the synchronous cooperative relay system over a wireless-hop coherent channel. To efficiently transmit signals with large outage probability and low PEP, source antennas adopted power allocated beamforming technic and relay nodes implemented AF protocol, respectively. Analysis and simulations show that the outage probability and pairwise error probability of the proposed model, for the given special efficiency R, are remarkably improved, which is compared with the previous communication scheme, especially the broadcast communication model. This finding may have significant impact on future design of synchronous cooperative relay communication system.