A novel threshold-based quadrature signaling scheme for cooperative networks  

作　　者：SONG XinHai GE JianHua SHI JingJing LI Jing 

机构地区：[1]State Key Laboratory of Integrated Service Networks,Xidian University

出　　处：《Science China(Information Sciences)》2014年第6期27-35,共9页中国科学（信息科学）（英文版）

基　　金：supported by National Basic Research Program of China(973 Program)(Grant No.2012CB316100);"111"Project(Grant No.B08038);National Natural Science Foundation of China(Grant Nos.61001207,61101144,61101145)

摘　　要：Presented is a novel threshold-based quadrature signaling（TQS）scheme for cooperative networks.By assigning different components of the quadrature signaling to different cooperative users and letting each user node decide whether to relay information for the other in the assigned component based on a threshold or not,independently,the TQS scheme effectively integrated the advantages of both quadrature signaling and threshold techniques.The authors investigate the end-to-end bit error rate（BER）performance and obtain its closed-form expression.According to our theoretical analysis,the TQS scheme can enhance the diversity gain of a cooperative system and,meanwhile,reduce the complexity of its implementation to a great extent.In addition,the communication system,using TQS scheme,has the feature of easily switching between cooperative and non-cooperative patterns.Finally,the numerical and simulation results show that the scheme has excellent performance as expected.Presented is a novel threshold-based quadrature signaling（TQS）scheme for cooperative networks.By assigning different components of the quadrature signaling to different cooperative users and letting each user node decide whether to relay information for the other in the assigned component based on a threshold or not,independently,the TQS scheme effectively integrated the advantages of both quadrature signaling and threshold techniques.The authors investigate the end-to-end bit error rate（BER）performance and obtain its closed-form expression.According to our theoretical analysis,the TQS scheme can enhance the diversity gain of a cooperative system and,meanwhile,reduce the complexity of its implementation to a great extent.In addition,the communication system,using TQS scheme,has the feature of easily switching between cooperative and non-cooperative patterns.Finally,the numerical and simulation results show that the scheme has excellent performance as expected.

关 键 词：cooperative diversity digital relaying quadrature signaling THRESHOLD bit error rate 

分 类 号：TN92[电子电信—通信与信息系统]