信道速率优化的无线中继系统数据传输算法

Data transmission algorithm for wireless relay system based on channel rate optimization

针对无线中继网络信道数据传输效率低、传输能耗大等问题,提出一种信道速率优化的无线中继系统数据传输算法。构建一个工程中常用的多跳半双工放大转发中继系统模型对网络的信道数据中继传输过程进行分析,进行渐近总速率分析并用逆威沙特随机矩阵得到总速率的近似值,采取天线角度调整的优化方法,调整中继天线仰角波束得到最优化的信道总速率。实验结果表明,相较基于最佳频谱租赁和资源共享双向中继通信系统和基于二次频谱接入的中继方案,该算法信道数据传输的丢包率分别降低了8.3%和9.7%,网络能量效率分别提高了21.4%和26.8%。

For the problems of low efficiency of data transmission and high energy consumption in wireless relay network,a data transmission algorithm for wireless relay system based on channel rate optimization was proposed.A multi-hop half-duplex transmission and repeater system model commonly used in engineering was built to analyze the channel data relay transmission process of the network.The asymptotic total rate analysis was performed,and inverse Wishart random matrix was used to get the total approximate rate.The optimization method of antenna angle adjustment was adopted,and the total channel rate was optimized by adjusting the elevation angle of the relay antenna.Experimental results show that the packet loss ratio of the channel data transmission is reduced by 8.3%and 9.7%,respectively,compared with the one based on the optimal spectrum leasing and resource sharing bidirectional relay communication system and the secondary spectrum access based relay scheme,while the energy efficiency of the network is increased by 21.4%and 26.8%respectively.