Interference Alignment and Cancellation Based Concurrent Transmission and Scheduling Scheme for Multiuser CR-MIMO System  

多用户认知MIMO系统基于于扰对齐与消除的并发传输与调度机制(英文)

作　　者：李钊 申彪 李建东 

机构地区：[1]Broadband Wireless Communications Laboratory,Information Science Institute,State Key Laboratory of Integrated Service Networks,Xidian University

出　　处：《China Communications》2013年第8期36-43,共8页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grants No. 61102057,No. 61231008;the National Key Basic Research Program of China (973 Program) under Grant No. 2009CB320404;the National Science and Technology Major Project under Grant No. 2012ZX-03003005-005;the 111 Project under Grant No.B08038;the Program for Changjiang Scholars and Innovative Research Team in University under Grant No. IRT0852;the ISN Project under Grant No. ISN1103005;the Fundamental Research Funds for the Central Universities under Grant No. K5051301014

摘　　要：In this paper,an Interference Alignment and Cancellation(IAC)based transmission and scheduling scheme is proposed for an infrastructured Cognitive Radio(CR)Multiple-Input Multiple-Output(MIMO)system with multiple secondary users.With the cooperation of Primary Base Station(PBS)and Secondary Base Station(SBS),a signal processing procedure is designed to guarantee the priority of the primary transmission.As a reward for offering help to the PBS,the SBS is granted communication opportunity.The transmission difference of various spatial channels is exploited in Secondary User(SU)scheduling.With the proposed scheme,interferencefree concurrent transmission of both PBS and SBS is implemented.Spatial channel resources can be effectively utilised compared with a traditional Interference Alignment(IA)based strategy.Simulation results show that the achievable data for primary transmission is enhanced by cooperative signal processing at the SBS.With respect to the SBS,its data rate grows with an increasing number of SUs by exploiting the multiuser diversity gain.In this paper,an Interference Alignment and Cancellation（IAC）based transmission and scheduling scheme is proposed for an infrastructured Cognitive Radio（CR）Multiple-Input Multiple-Output（MIMO）system with multiple secondary users.With the cooperation of Primary Base Station（PBS）and Secondary Base Station（SBS）,a signal processing procedure is designed to guarantee the priority of the primary transmission.As a reward for offering help to the PBS,the SBS is granted communication opportunity.The transmission difference of various spatial channels is exploited in Secondary User（SU）scheduling.With the proposed scheme,interferencefree concurrent transmission of both PBS and SBS is implemented.Spatial channel resources can be effectively utilised compared with a traditional Interference Alignment（IA）based strategy.Simulation results show that the achievable data for primary transmission is enhanced by cooperative signal processing at the SBS.With respect to the SBS,its data rate grows with an increasing number of SUs by exploiting the multiuser diversity gain.

关 键 词：CR MIMO uplink IAC scheduling 

分 类 号：TN919.3[电子电信—通信与信息系统]