5th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications

Research Article

Cooperative Amplify-and-Forward relaying in cognitive radio networks

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  • @INPROCEEDINGS{10.4108/ICST.CROWNCOM2010.9260,
        author={Raed Manna and Raymond H. Y. Louie and Yonghui Li and Branka Vucetic},
        title={Cooperative Amplify-and-Forward relaying in cognitive radio networks},
        proceedings={5th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2010},
        month={9},
        keywords={Bit error rate Diversity methods Interference Signal to noise ratio Slot antennas Strontium Transmitting antennas},
        doi={10.4108/ICST.CROWNCOM2010.9260}
    }
    
  • Raed Manna
    Raymond H. Y. Louie
    Yonghui Li
    Branka Vucetic
    Year: 2010
    Cooperative Amplify-and-Forward relaying in cognitive radio networks
    CROWNCOM
    IEEE
    DOI: 10.4108/ICST.CROWNCOM2010.9260
Raed Manna1,*, Raymond H. Y. Louie1,*, Yonghui Li1,*, Branka Vucetic1,*
  • 1: Telecommunications Lab, School of Electrical and Information Engineering, The University of Sydney, Australia
*Contact email: manna@ee.usyd.edu.au, rlouie@ee.usyd.edu.au, lyh@ee.usyd.edu.au, branka@ee.usyd.edu.au

Abstract

In this paper, we consider an underlay cognitive radio network consisting of a primary transmitter (PT), a primary receiver (PR), a secondary transmitter (ST) and a secondary receiver (SR). We propose a two time slot spectrum sharing scheme based on cooperative relay transmission in addition to a practical design of the antenna weights at the ST to achieve high performance at the primary and the secondary networks. To analyze the performance of our proposed scheme, we first derive a closed form expression for the diversity order achieved at the PR and the SR. We then show through simulations that our proposed scheme, compared to conventional systems where no cooperation occurs, results in an improved quality of service at both the primary and the secondary networks, namely, the error rate and the ergodic capacity.