5th International ICST Conference on Wireless Internet

Research Article

On the impact of primary user localization on rate performance of CR systems

Download500 downloads
  • @INPROCEEDINGS{10.4108/ICST.WICON2010.8683,
        author={Nurul H. Mahmood and Geir E. \`{U}ien and Ma\~{n}t\^{e} Brandt-Pearce},
        title={On the impact of primary user localization on rate performance of CR systems},
        proceedings={5th International ICST Conference on Wireless Internet},
        publisher={IEEE},
        proceedings_a={WICON},
        year={2010},
        month={4},
        keywords={Underlay Cognitive Radio CR achievable rate Localization information of PU},
        doi={10.4108/ICST.WICON2010.8683}
    }
    
  • Nurul H. Mahmood
    Geir E. Øien
    Maïté Brandt-Pearce
    Year: 2010
    On the impact of primary user localization on rate performance of CR systems
    WICON
    IEEE
    DOI: 10.4108/ICST.WICON2010.8683
Nurul H. Mahmood1,*, Geir E. Øien1,*, Maïté Brandt-Pearce2,3,*
  • 1: Department of Electronics & Telecomunications, Norwegian Univ. of Science & Technology, N-7491, Trondheim, Norway
  • 2: Charles L. Brown Department of Electrical and Computer Engineering,
  • 3: University of Virginia, Charlottesville, Virginia 22904
*Contact email: nurulhud@iet.ntnu.no, oien@iet.ntnu.no, mb-p@virginia.edu

Abstract

This paper investigates how localization knowledge of primary users impacts the sum-rate performance of a secondary system in an underlay cognitive radio setting. Two different probabilistic models for the primary users' location information are assumed, one uniform distribution and the other with Gaussian distribution. The interplay between the achievable rate of the secondary system and the primary users' location information under the AWGN and a fading channel model are presented and analyzed. Investigations are carried out for different propagation environments, localization models and primary-secondary user settings. Results show that the relationship between the secondary system sum-rate and the primary users' location information depends on the number of primary and secondary users, as well as the propagation environment. Empirical expressions for the sum-rate are proposed for different localization probability distributions.