Cross-layer design for cooperative MIMO systems with relay selection and imperfect CSI  

作　　者：YU XiangBin ZHOU TingTing RUI Yun YIN Xin CHEN Ming 

机构地区：[1]College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics [2]National Mobile Communications Research Laboratory, Southeast University [3]Shanghai Advanced Research Institute, Chinese Academic of Science

出　　处：《Science China(Information Sciences)》2013年第2期124-133,共10页中国科学（信息科学）（英文版）

基　　金：supported in part by Doctoral Fund of Ministry of Education of China (Grant No. 20093218120021);National Natural Science Foundation of China (Grant No. 61172077);Open Research Fund of National Mobile Communications Research Laboratory of Southeast University (Grant No. 2012D17);National High Technology Research and Development Program of China (863 Program) (Grant No. 2011AA01A105);Shanghai Committee of Science and Technology (Grant Nos. 10DZ1500700, 11DZ1500500);Key Deployment Project of Chinese Academic of Sciences (Grant No. KGZD-EW-103);Innovation Fund of College of Electronic and Information Engineering of Nanjing University of Aeronautics and Astronautics (NUAA) (Grant No. DZS201104);Funding of Graduate Innovation Center in NUAA (Grant No. kfjj120206)

摘　　要：Based on imperfect channel state information （CSI） and relay selection, a cross-layer optimization scheme is developed for cooperative MIMO system, and the corresponding system performance is investigated in Rayleigh fading channel. By the theoretical analysis and mathematical manipulation, the average spectral efficiency （SE）, packet error rate （PER） and packet loss rate （PLR） are derived. As a result, closed-form expressions of the average SE, PER and PLR are obtained, respectively. According to these, a cross-layer design （CLD） scheme subject to the average PER constraints is proposed to avoid the SE performance loss caused by the conventional instantaneous PER constraints. The scheme optimizes the adaptive thresholds by maximizing the average SE of the system, and an iteration method joint the Lagrange multiplier and Newton methods is presented to solve the above optimization problem. Simulation results verify the validity of the theoretical analysis. The results show that the proposed CLD scheme can improve the SE while target PLR is maintained. The CLD scheme under average PER constraints has higher SE than the conventional CLD scheme under instantaneous PER constraints.Based on imperfect channel state information （CSI） and relay selection, a cross-layer optimization scheme is developed for cooperative MIMO system, and the corresponding system performance is investigated in Rayleigh fading channel. By the theoretical analysis and mathematical manipulation, the average spectral efficiency （SE）, packet error rate （PER） and packet loss rate （PLR） are derived. As a result, closed-form expressions of the average SE, PER and PLR are obtained, respectively. According to these, a cross-layer design （CLD） scheme subject to the average PER constraints is proposed to avoid the SE performance loss caused by the conventional instantaneous PER constraints. The scheme optimizes the adaptive thresholds by maximizing the average SE of the system, and an iteration method joint the Lagrange multiplier and Newton methods is presented to solve the above optimization problem. Simulation results verify the validity of the theoretical analysis. The results show that the proposed CLD scheme can improve the SE while target PLR is maintained. The CLD scheme under average PER constraints has higher SE than the conventional CLD scheme under instantaneous PER constraints.

关 键 词：cross-layer design relay selection cooperative MIMO imperfect CSI spectrum efficiency packet loss rate 

分 类 号：TN919.3[电子电信—通信与信息系统]