[1]王小冲[],刘陈[],傅友华[]. 一种认知无线电中新型干扰对齐算法[J].计算机技术与发展,2015,25(08):103-107.
　WANG Xiao-chong[],LIU Chen[],FU You-hua[]. A New Interference Alignment Algorithm in Cognitive Radio System[J].,2015,25(08):103-107.
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 一种认知无线电中新型干扰对齐算法()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
25
期数:
2015年08期
页码:
103-107
栏目:
智能、算法、系统工程
出版日期:
2015-08-10

文章信息/Info

Title:
 A New Interference Alignment Algorithm in Cognitive Radio System
文章编号:
1673-629X（2015)08-0103-05
作者:
 王小冲[1] ; 刘陈[1] ; 傅友华[2]
 1.南京邮电大学 电子科学与工程学院；2. 东南大学 移动通信国家重点实验室
Author(s):
 WANG Xiao-chong[1];  LIU Chen[1] ; FU You-hua[2]
关键词:
 ; 双层预编码; 干扰对齐; 认知无线电; 多输入多输出
Keywords:
 ; dual-layer pre-coding; interference alignment; cognitive radio; MIMO
分类号:
TN92
文献标志码:
A
摘要:
 干扰对齐作为一种新兴的干扰管理方法，由于可以压缩干扰信号空间，并且提高系统自由度，因而近些年来受到了广泛的研究。在1对主用户和K对次用户的多天线多输入多输出( MIMO)网络中，文中重新设计了主用户和次用户的预编码矩阵和接收矩阵，并且提出了一种新型的次用户双层预编码干扰对齐算法。在保证了主用户获得最小均方误差( MMSE)性能的同时，通过设计次用户的第一层预编码矩阵，使得次用户能够和主用户在同一频段上进行数据传输，并且不对主用户产生任何干扰，从而提高了系统的频谱利用率。次用户的第二层预编码矩阵保证了次用户之间的干扰对齐，提高了次用户的容量和自由度。仿真结果显示，相较于传统的认知无线电中单层预编码干扰对齐算法，本算法中的次用户可以获得更高的数据速率。
Abstract:
 As a new interference management method,interference alignment can compress the interference signal space and improve the Degree Of Freedom ( DOF) ,much attention has been paid to the interference alignment. In this paper,propose a dual-layer pre-coding interference alignment scheme in a Multiple Input Multiple Output ( MIMO) cognitive radio system including one primary user and K sec-ondary users. The Minimum Mean Square Error ( MMSE) of the primary user is guaranteed,at the same time,the first layer pre-coding matrix allows the secondary users to share the same frequency band of the primary user without generating any interference to the primary user,thus improving the spectrum efficiency of the system. The second layer pre-coding matrix assures the interference between the sec-ondary users is aligned,improving the capability and DOF of second users. The numerical results show that compared with conventional interference alignment schemes in cognitive radio system,a higher date rate of the secondary users is achieved.

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更新日期/Last Update: 2015-09-11