摘要
认知无线电与多入多出(MIMO)技术结合而成的认知MIMO技术,能够进一步提高系统性能以及频谱利用率。而系统容量是表征通信系统性能最重要的标志之一,即通信系统的最大传输速率。本文在传统的MIMO容量推导的基础上,引入了主次用户间干扰项,给出了存在用户干扰情况下信道传输速率的理论上限。然后,重点仿真分析了用户间的干扰导致的容量损失。最后,分析给出了干扰门限对主用户容量的影响。
The cognitive Multiple-Input and Muhiple-Output（MIMO） technology integrated by the cognitive radio and MIMO, can improve the system performance and spectrum efficiency. The system capacity characterizes the maximum transmission rate of the communication system, namely, the communication system performance. In basis of the traditional MIMO system capacity derivation, the channel transmission rate theory limit under user interference is given after introducing the interference between the primary users and the secondary users. And then, the capacity loss caused by the interference between users is simulated and studied. The influence of the interference threshold on the primary user is analyzed.
出处
《太赫兹科学与电子信息学报》
2013年第2期219-223,共5页
Journal of Terahertz Science and Electronic Information Technology
基金
国家重大科技专项资助项目(2009ZX03003-007)
关键词
认知无线电
多入多出
系统容量
用户间干扰
干扰门限
cognitive radio
Multiple-Input and Multiple-Output（MIMO）
system capacity
interferencebetween users
interference threshold
