多天线双向中继系统中的中继处理与资源分配策略  

Relay Processing and Resource Allocation Strategies for Multi-antenna Two-Way Relay System

作　　者：赵睿[1,2] 傅友华[1] 李春国[1] 杨绿溪[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096 [2]华侨大学信息科学与工程学院,泉州362021

出　　处：《电子与信息学报》2010年第4期763-769,共7页Journal of Electronics & Information Technology

基　　金：国家973计划项目(2007CB310603);国家自然科学基金(60672093;60496310;60702029;60902012);国家863计划项目(2007AA01Z262);江苏省自然科学基金(BK2005061)资助课题

摘　　要：该文在多天线放大转发双向中继系统中,根据最小和均方误差(MSMSE)准则,以较小的复杂度得到了MSE最优的中继处理矩阵的闭合表达式。为综合利用空域和频域分集,探讨了OFDM双向中继系统的资源分配策略,提出了实现复杂度低的分层子载波配对策略和功率优化分配策略。仿真结果显示,所设计的中继处理策略在系统和速率和误码率性能上均明显优于其他双向中继策略,且性能随着中继天线数的增加而提升;结合功率分配的分层子载波配对策略能明显提升系统和速率,性能接近最优策略。In multi-antenna amplify-and-forward two-way relay system,the closed form expression of the MSE optimal relay processing matrix with low complexity based on Minimum Sum Mean Square Error （MSMSE） criterion is derived. To utilize the spatial diversity and frequency diversity comprehensively,the resource allocation strategy in OFDM two-way relay system is investigated,and the layered subcarrier pairing with low complexity and power optimized allocation strategy is proposed. Simulation results show that,the proposed relay processing scheme outperforms other two-way relaying schemes in the performances of system sum rate and bit error ratio,which improve with the number of relay antennas,and the layered subcarrier pairing strategy combined with power allocation can improve the system sum rate dramatically and its performance approaches the optimal strategy.

关 键 词：通信网络 双向中继 放大转发 均方误差 子载波配对 功率分配 

分 类 号：TN92[电子电信—通信与信息系统]