摘要
为研究MIMO协同中继系统中多种发射功率分配中继协议(TPA)策略,首先利用拉格朗日函数计算CF中继协议中每一个数据流的方法,推导出最佳TPA方案的闭合式;其次利用一种新的注水法则找到DF协议的基础上每个数据流的最佳节点和天线选择,从而实现了显著的容量增益.仿真结果表明:所提出的两种TPA算法能够获得相对好的容量增益,同时CF中继协议在实现覆盖延伸方面,是未来的LTE-A网络的候选技术之一.
In this paper, the transmit power allocation （TPA） strategies for various relaying protocols are investigated for MIMO cooperative relaying systems. Firstly, we deduce a closed form of optimal TPA scheme by utilizing Lagrange function for each data stream of CF relaying mechanism. Secondly, A novel water-filling scheme is presented for DF protocol based on best node and antenna selection for each data stream, which can achieve significant capacity gain. Simulation results show that the proposed TPA schemes can achieve obvious capacity gain, and the CF relaying protocol is a good candidate technology for coverage extension for LTE-A system.
出处
《广西工学院学报》
CAS
2013年第1期83-88,共6页
Journal of Guangxi University of Technology
基金
广西教育厅科研项目(201106LX672)资助
