Interference Alignment Algorithm for Considering the Throughput of Cognitive Users in Cognitive MIMO Network  

作　　者：张慧杰 李莉 邱昊 夏林 

机构地区：[1]College of Information,Machanical and Electrical Engineering,Shanghai Normal University

出　　处：《Journal of Donghua University(English Edition)》2015年第3期481-484,共4页东华大学学报（英文版）

基　　金：Innovation Program of Shanghai Municipal Education Commission,China(No.12ZZ126);the Program of Shanghai Normal University,China(No.DZL126)

摘　　要：The cognitive multiple input multiple output( MIMO)network can utilize radio spectrum efficiently and satisfy the demand of high data rate. In order to decrease the interference during transmission,a new interference alignment( IA) algorithm based on cognitive MIMO networks is proposed in this paper. The algorithm is realized by designing two-level pre-coding, the first-level precoding aligns the interference generated by the cognitive users( CUs) to unused sub-channels of the primary user( PU),thereby eliminating the interference of CUs to PU; the second-level precoding is used to improve the throughput of CUs. Simulation shows that the proposed IA algorithm can eliminate the interference that the CUs produce on the PU and improve the throughput of CUs spontaneously.The cognitive multiple input multiple output（ MIMO）network can utilize radio spectrum efficiently and satisfy the demand of high data rate. In order to decrease the interference during transmission,a new interference alignment（ IA） algorithm based on cognitive MIMO networks is proposed in this paper. The algorithm is realized by designing two-level pre-coding, the first-level precoding aligns the interference generated by the cognitive users（ CUs） to unused sub-channels of the primary user（ PU）,thereby eliminating the interference of CUs to PU; the second-level precoding is used to improve the throughput of CUs. Simulation shows that the proposed IA algorithm can eliminate the interference that the CUs produce on the PU and improve the throughput of CUs spontaneously.

关 键 词：cognitive multiple input multiple output(MIMO) interference alignment(IA) pre-coding 

分 类 号：TN929.5[电子电信—通信与信息系统]