摘要
采用机会,给出了在译码转发方式下基于网络编码的双向多中继系统平均中断概率表达式,通过Monte Carlo仿真,验证了理论分析的正确性。随后分析了功率分配因子与信噪比和中继节点个数在不同情形下的系统中断性能,指出了功率分配因子与系统总功率和中继节点的内在关系。仿真结果表明,在双向多中继系统中采用网络编码和机会中继时,功率分配因子取值在0.6或0.6附近时能够获得最优的系统中断性能。
With opportunistic relay scheme,an outage probability expression of bi-directional multi-relay system with decode-and-forward based on network coding is given in this paper,and the theory analysis is proved correct by Monte Carlo simulation.Then the system average outage performance at different situations of different power allocation coefficient,SNR and the number of relay is analyzed,and the inherent relationship between power allocation coefficient and total system power as well as the number of relay is pointed out.Simulation results indicate that the optimal system outage performance of bi-directional multi-relay system could be achieved with network coding and opportunistic relay when power allocation coefficient is chosen at 0.6 or about 0.6.
出处
《通信技术》
2011年第10期38-40,43,共4页
Communications Technology
基金
国家863计划(批准号:2009AA01Z249)
面向IMT-Advanced协作中继的网络编码技术(No.2008ZX03003)
关键词
机会中继
网络编码
双向多中继系统
中断概率
功率分配因子
opportunistic relay
network coding
bi-directional multi-relay system
outage probability
power allocation coefficient
