协作通信系统的有限反馈功率分配性能研究

Research on the Performance of Finite Feedback Power Allocation in Cooperative Communication systems

在无线通信中,协作分集通过共享资源达到改善通信质量、提高通信性能的目的。对协作通信系统中的功率进行分配可以利用有限的资源获得更高的系统性能。协作通信系统的功率分配需要接收端向发送端反馈信息。由于全反馈在实际场景中很难实现,研究有限反馈功率分配策略。通过仿真,对比分析理想功率分配算法和一比特、二比特、三比特反馈功率分配算法的中断概率。结果表明反馈的比特数越大中断概率越小,系统性能越接近理想功率分配方案。当反馈的比特数越大时,再增加反馈比特数系统的特性改善较少。

In wireless communication,cooperative diversity improves communication quality and performance by sharing resource.Power allocation of cooperative communication system can use limited resource acquire better system performance.Power allocation of cooperative communication system needs feedback information from receiving terminal to transmitting termi-nal.As full feedback is difficult to realize in actual scenario,research finite feedback power allocation strategy.Contrast inter-rupt probability of ideal power allocation method and one byte,two byte,three byte feedback power allocation method by simu-lation.simulation result indicates that number of feedback byte is bigger,system performance is closer to ideal power alloca-tion method.When feedback byte is big enough,bigger feedback byte brings less improving of system performance.