7th International Conference on Communications and Networking in China

Research Article

Joint Optimization of Sensing Time and Cooperative User in Cognitive Radio

  • @INPROCEEDINGS{10.1109/ChinaCom.2012.6417500,
        author={liu xin and Qingzhong Li and Xuezhi Tan},
        title={Joint Optimization of Sensing Time and Cooperative User in Cognitive Radio},
        proceedings={7th International Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2012},
        month={10},
        keywords={cognitive radio; energy detection; cooperative detection; joint optimization},
        doi={10.1109/ChinaCom.2012.6417500}
    }
    
  • liu xin
    Qingzhong Li
    Xuezhi Tan
    Year: 2012
    Joint Optimization of Sensing Time and Cooperative User in Cognitive Radio
    CHINACOM
    IEEE
    DOI: 10.1109/ChinaCom.2012.6417500
liu xin1,*, Qingzhong Li1, Xuezhi Tan1
  • 1: Harbin Institute of Technology
*Contact email: liuxinstar1984@gmail.com

Abstract

We proposed a new cognitive radio (CR) model in this paper whereby CR senses the environment periodically and then forwards the sensing results one at a time and through such process CR develops an efficiency function to reflect the performance and efficiency of the proposed model. In addition we proposed a joint algorithm of sensing time and a cooperative user in order to obtain the maximal efficiency of the CR network. Results obtained from simulations process shows that the efficiency of the proposed algorithm is predominant and when SNR=0dB, it holds 0.4W more residual power than that of sensing-throughput tradeoff model. And lastly we shows that cooperative detection can improve the efficiency of the model, however the results also shows that the efficiency of the model may degrade when large numbers of cooperative CRs are involved in the process.