In this paper, the problem of power control for cognitive systems is studied via game theory. The objective is to maximize the sum utility of secondary users (SUs) subject to the primary users (PUs) interference constraints, the transmission power constraints of SUs, and the signal-to-interference-plus-noise ratio (SINR) constraint of each SU. In our earlier work, the problem was formulated as a non-cooperative game under the assumption of perfect channel state information (CSI). Nash equilibrium (NE) is considered as the solution of this game. A distributed algorithm is proposed which can converge to the NE. Due to the limited cooperation between the secondary base station (SBS) and the PU, imperfect CSI between the SBS and the PU is further considered in this work. The problem is formulated as a robust game. As it is difficult to solve the optimization problem in this case, existence of the NE cannot be analyzed. Therefore, convergence property of the sum utility of SUs will be illustrated numerically. Simulation results show that under imperfect CSI the proposed approach can converge to a locally optimal transmission power level, while the sum utility of SUs converges with the increase of the transmission power constraint of SUs.
목차
Abstract 1. Introduction 2. System Model and Problem Formulation 3. Power Control Game under Imperfect CSI A. Game-theoretic Formulation B. Analysis of NE 4. Numerical Results 5. Conclusion Acknowledgements References
키워드
Cognitive radiopower controlimperfect channel state informationgame theory.
저자
Guanglong Yang [ Communication Research Center, Harbin Institute of Technology, Harbin, 150080, China, Key Laboratory of Police Wireless Digital Communication, Ministry of Public Security, Harbin, 150080, China. ]
Xiao Wang [ Communication Research Center, Harbin Institute of Technology, Harbin, 150080, China, Key Laboratory of Police Wireless Digital Communication, Ministry of Public Security, Harbin, 150080, China. ]
Xuezhi Tan [ Communication Research Center, Harbin Institute of Technology, Harbin, 150080, China, Key Laboratory of Police Wireless Digital Communication, Ministry of Public Security, Harbin, 150080, China. ]
보안공학연구지원센터(IJCA) [Science & Engineering Research Support Center, Republic of Korea(IJCA)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Control and Automation
간기
월간
pISSN
2005-4297
수록기간
2008~2016
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Control and Automation Vol.7 No.12