基于子载波选择配对及功率优化分配的多跳中继系统研究  

Multi-hop Relay OFDM System Based on Subcarrier Selection Pairing and Optimal Power Allocation

作　　者：冯亮[1] 

机构地区：[1]西北工业大学管理学院,西安710072

出　　处：《计算机科学》2015年第10期92-94,100,共4页Computer Science

基　　金：国家自然科学基金项目(11371003);陕西省教育厅项目(14JK1057)资助

摘　　要：为了提升OFDM协作通信系统的网络覆盖率及网络容量,提出了一种基于子载波选择配对及功率优化分配的多跳中继OFDM系统优化算法。首先,通过在OFDM的系统模型上进行中继配对和非中继配对的性能分析,将子载波选择配对转换为一个整数规划问题,并采用基于匈牙利算法的规划方法进行配对矩阵的计算。接着,根据OFDM系统的功率分配问题,通过KKT条件对中继功率及电源功率进行优化,从而实现中继系统的功率优化分配。最终的仿真结果表明,与统计质量QoS保证的资源分配方案以及OFDM中继系统异构服务的资源分配算法相比,所提出的方法在提高网络覆盖率和容量上均表现出更好的效果。In order to improve network coverage and network capacity of OFDM cooperative communication systems, a multi-hop relay OFDM system based on subcarrier selection pairing and optimal power allocation was proposed. Per- forrnance analysis of matching pair of relay and non-matching pair of relay was performed on OFDM relay system model the sub-carrier selection paired was converted to an integer programming problem, and pairing matrix was calculated using a matrix-based planning approach based on Hungarian algorithrrL Then, according to the power allocation problem of OFDM systems, under KKT conditions optimized relay power and power allocation method were used. The final sim- ulation results show that compared to the program resource allocation with QoS statistical quality assurance and re- source allocation algorithm of OFDM relay system of heterogeneous services, the proposed method improves network coverage and capacity with better results.

关 键 词：中继OFDM系统 子载波选择配对 功率优化分配 网络覆盖率 物联网 

分 类 号：TN913[电子电信—通信与信息系统]