Earticle

초록

영어

In this study, energy-efficient (EE) resource allocation in orthogonal frequency division multiplexing-based cognitive radio networks with imperfect spectrum sensing is investigated. We present a new EE model by considering the sensing errors. Optimizing such an EE expression saves valuable resources, such as battery life, by selectively allocating power to underutilized subcarriers, and also achieves EE gain compared with general EE expression. Given that the primary user’s interference tolerance can be defined as either the Peak Interference Power (PIP) constraint or Average Interference Power (AIP) constraint for all subchannels, we compare the EE performance for the two interference power constraints. Finally, we propose an optimal EE resource allocation scheme based on the quasiconcave relation between the EE and transmit power. Simulations show that the new EE design improves EE compared with the conventional EE design, and the EE is higher with AIP constraint than that with PIP constrain under certain interference power.

목차

Abstract
 1. Introduction
 2. System Description and Problem Formulation
 3. Optimal Power Allocation
 4. Simulation Results
 5. Conclusion
 6. Appendix
 Acknowledgment
 References

키워드

저자

• Shuang Liang [ School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China ] First author
• Shouyi Yang [ School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China ] Corresponding author
• Wanming Hao [ School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China ]
• Bing Ning [ School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Multimedia and Ubiquitous Engineering

• 간기

  월간

• pISSN

  1975-0080

• 수록기간

  2008~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605