Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2012, Vol. 35 ›› Issue (3): 1-5.doi: 10.13190/jbupt.201203.1.zhanggy

• Papers • Previous Articles     Next Articles

Joint Optimization with Sensing-Transmission Time Allocation and Power Control for Cooperative Wireless Network

ZHANG Guo-yi1,XU Jian1,YANG Jun-quan1,CHEN Bao-ren2   

  1. 1Power Control Center of China Southern Power Grid, Guangzhou 510623, China;
    2Network and Information Department of Guangdong Electric Power Design Institute, Guangzhou 510663, China
  • Received:2011-07-29 Revised:2011-10-08 Online:2012-06-28 Published:2012-02-29

Abstract:

Joint optimization assisted by the time and power allocation of spectrum sensing and data transmission is a new paradigm for cooperative wireless network. By taking full account of different cognitive user`s transmit power over channels and their mis-detection/false alarm probability of licensed users, a new joint optimization scheme with amplify-and-forward mode based on system energyefficiency maximization is proposed for sensing-transmission time allocation and power control. It is proven that the global optimal solution of this scheme can be tractable by sequential optimization method. Simulation shows that the energy efficiency of the relay-assisted transmission using our proposed scheme outperforms the non-relay transmission, and the system performance will be improved with sensing-transmission ratio decrement and signal-to-noise ratio of the licensed user increment.

Key words: cooperative wireless , network, cooperative relay transmission, spectrum sensing, power control

CLC Number: