Research on the Outage Exponent of Superposition Coding Relaying with Only Relay-to-Source Channel State Feedback  

作　　者：JIA Xiangdong FU Haiyang 

机构地区：[1]Wireless Communications Key Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing 210003, China [2]Northwest Normal University, Lanzhou 730070, China

出　　处：《Chinese Journal of Electronics》2011年第1期161-164,共4页电子学报（英文版）

基　　金：This work is supported in part by the Ntional Natural Science Foundation of China （No.61071090） and in part by the Postgraduate Innovation Program of Scientific Research of Jiangsu Province （No.CX10B-184Z）.

摘　　要：Based on the canonical three nodes scheme of cooperative relaying, a 2-level rate Superposition coding relaying （SC-relaying） strategy was investigated as well as the outage performance analysis, in which only the relayto-source Channel state feedback （CSF） and a short term power constraint were considered. For the 2-level SC- relaying, besides the optimizing outage exponent of basic signal obtained, the closed form solution of the optimizing outage exponent was also derived through strict math manipulation. The closed form solution is the exact solution of the optimizing outage exponent when the multiplexing gain of basic signal is more than or equal to 0.5 but it is only the approximate lower bound when it is less than 0.5. The numerical analysis show that as CSF introduced a remarkable performance enhancement of Diverslty-andmultiplexing tradeoff （DMT） is obtained, which is also increasing with the link feedback resolution K. However, when K 〉 6 the DMT performance achieves steady maximal value approximately.

关 键 词：Cooperative relaying Superposition coding Diversity-and-multiplexing tradeoff （DMT）. 

分 类 号：TN916.427[电子电信—通信与信息系统] TP13[电子电信—信息与通信工程]