On the Asymptotic Sum-Rate of the Relay-Assisted Amplify-and-Forward Cognitive MIMO Channel

被引：0
|
作者：
Girnyk, Maksym A. [1 ,2 ]
Vehkapera, Mikko [1 ,2 ]
Rasmussen, Lars K. [1 ,2 ]
机构：
[1] KTH Royal Inst Technol, Sch Elect Engn, Stockholm, Sweden
[2] KTH Royal Inst Technol, ACCESS Linnaeus Ctr, Stockholm, Sweden
来源：
2012 IEEE 23RD INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC) | 2012年
基金：
欧洲研究理事会;
关键词：
CAPACITY; SYSTEMS; RADIO;
D O I：
暂无
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
This paper studies the asymptotic sum-rate of the primary network within the relay-assisted multi-antenna cognitive radio system performing amplify-and-forward relaying. The achievable sum-rates are derived in the large-system limit by means of the replica method. A closed-form expression for the sum-rate of the primary network is obtained for large antenna arrays as a function of parameters obtained by solving a set of fixed-point equations. Numerical simulations confirm the validity of the results even for systems with only a few antennas at each terminal.
引用
收藏
页码：709 / 714
页数：6
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