Game-Theoretic Joint Power Allocation and Feedback Rate Control for Cognitive MIMO Systems with Limited Feedback

被引：0
|
作者：
Zhao, Feng [1 ]
Wang, Chen [1 ]
Bie, Rongfang [2 ]
机构：
[1] Guilin Univ Elect Technol, Minist Educ, Key Lab Cognit Radio & Informat Proc, Guilin, Peoples R China
[2] Beijing Normal Univ, Coll Informat Sci & Technol, Beijing, Peoples R China
来源：
WIRELESS ALGORITHMS, SYSTEMS, AND APPLICATIONS, WASA 2014 | 2014年 / 8491卷
基金：
中国国家自然科学基金;
关键词：
Cognitive radio; Multi-input multi-output (MIMO); Power allocation; Limited feedback; Game theory; SPECTRUM ACCESS; RADIO; NETWORKS; CHANNELS;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper, we consider a case with imperfect channel state information (CSI) in practical cognitive MIMO systems. We first analyze interference to the primary users (PUs) and then propose a joint power allocation and feedback rate control algorithm based on game theory. The utility function of each secondary user (SU) is defined as the corresponding throughput by CSI feedback minus the price as a linear function of feedback rate. Besides, the existence of the Nash equilibrium (NE) is proven. We derive the relationship between power allocation and feedback rate, and an iterative algorithm is proposed to reach the NE. Also, with the purpose of reduce interference and increase system capacity, water-filling (WF) power allocation and zero-forcing (ZF) beamforming are proposed. Simulation results shows that the proposed algorithm is better than equally distributed feedback rate scheme, obviously.
引用
收藏
页码：531 / 541
页数：11
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