Outage probability analysis for superposition coded symmetric relaying  

作　　者：WU Yi ZHENG Meng FEI ZeSong LARSSON Erik G. KUANG JingMing 

机构地区：[1]Modem and Common IP Development, ST-Ericsson, Nya Vattentornet [2]Research Centre of Digital Communication Technology (RCDCT), School of Information and Electronics, Beijing Institute of Technology [3]Department of Electrical Engineering (ISY), Linkping University

出　　处：《Science China(Information Sciences)》2013年第2期60-68,共9页中国科学（信息科学）（英文版）

基　　金：supported in part by VINNOVA;supported by a grant from the Knut and Alice Wallenberg Foundation;supported in part by the Sino-Swedish IMT-Advanced and Beyond Cooperative Program (Grant No. 2008DFA11780) and by Ericsson

摘　　要：Superposition coded symmetric relaying is a bandwidth-efficient cooperative scheme where each source node simultaneously transmits both its own ＂local＂ packet and ＂relay＂ packet that originated at its partner by adding the modulated local and relay signals in Euclidean space. This paper investigates the power allocation and outage probability of a superposition coded symmetric relaying system with finite-constellation signaling. We first derive the mutual information （MI） metrics for the system. The derived MI metrics consist of two parts： one represents the MI conveyed by the modulated signal corresponding to its own data, and the other represents the MI conveyed by the modulated signal corresponding to its partner’s data. Using MI based effective signal-to-noise ratio mapping technique, we attain expressions for the outage probability. Furthermore, we discuss power allocation policies that minimize the outage probability. Simulation results are presented to verify the correctness of the outage probability analysis and the benefits of the power allocation.Superposition coded symmetric relaying is a bandwidth-efficient cooperative scheme where each source node simultaneously transmits both its own ＂local＂ packet and ＂relay＂ packet that originated at its partner by adding the modulated local and relay signals in Euclidean space. This paper investigates the power allocation and outage probability of a superposition coded symmetric relaying system with finite-constellation signaling. We first derive the mutual information （MI） metrics for the system. The derived MI metrics consist of two parts： one represents the MI conveyed by the modulated signal corresponding to its own data, and the other represents the MI conveyed by the modulated signal corresponding to its partner’s data. Using MI based effective signal-to-noise ratio mapping technique, we attain expressions for the outage probability. Furthermore, we discuss power allocation policies that minimize the outage probability. Simulation results are presented to verify the correctness of the outage probability analysis and the benefits of the power allocation.

关 键 词：superposition coding symmetric relaying mutual information outage probability power allocation 

分 类 号：TN925[电子电信—通信与信息系统]