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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 performance of inter-personal communication (IVC) system under dual Rayleigh fading, an IVC model of relay using access point is given.The statistical characteristics of received signal-to-noise ratio of cooperative IVC system are analyzed and the probability of interrupting Based on the method of moment generation, a uniform upper bound of the average symbol error rate (ASER) is derived. The simulation results show that the theoretical analysis of the discontinuity probability is consistent with the numerical calculation results. The best power allocation strategy ASER can be reduced, more than the equal power allocation strategy to obtain the maximum to 3dB diversity gain.