AP中继的车际通信系统中断概率和差错性能分析

Outage Probability and Error Performance Analysis in AP-Relayed Inter-Vehicular Communication System

为了改善双瑞利衰落下车际通信(IVC)系统的性能,给出了利用接入点进行中继的IVC模型.分析了协作IVC系统接收信噪比的统计特性,得到了中断概率的闭式解,采用基于矩生成函数的方法导出了平均误符号率(ASER)的一致上界.仿真结果表明,中断概率的理论分析与数值计算结果相吻合;在协作IVC中采用最佳功率分配策略可减小ASER,比等功率分配策略多获得最大至3dB的分集增益.

In order to improve the system performance for vehicle-to-vehicle communications over double- Rayleigh ladings, the access-point relayed inter-vehicular communication （IVC） model is proposed. The statistical properties of the receiving signal-to-noise ratio in IVC system are studied and a closed-form ex- pression on outage probability is obtained. And based on moment generating function method, the union upper bound on average bit error rate （ASER） is derived. Simulation results show that the theoretical a- nalysis on outage probability coincides with Monte Carlo numerical calculations well. The ASER of the re- laying IVC system is decreased and the diversity gains are achieved 3 dB more at most through optimal power allocation method than equal power allocation scheme.