7th International Conference on Cognitive Radio Oriented Wireless Networks

Research Article

On Multiuser Switched Diversity Transmission for Spectrum Sharing Systems

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2012.249524,
        author={Marwa Qaraqe and Mohamed Abdallah and Erchin Serpedin and Mohamed-Slim Alouini},
        title={On Multiuser Switched Diversity Transmission for Spectrum Sharing Systems},
        proceedings={7th International Conference on Cognitive Radio Oriented Wireless Networks},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={7},
        keywords={multiuser diversity switched diversity spectrum sharing performance analysis},
        doi={10.4108/icst.crowncom.2012.249524}
    }
    
  • Marwa Qaraqe
    Mohamed Abdallah
    Erchin Serpedin
    Mohamed-Slim Alouini
    Year: 2012
    On Multiuser Switched Diversity Transmission for Spectrum Sharing Systems
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2012.249524
Marwa Qaraqe,*, Mohamed Abdallah1, Erchin Serpedin2, Mohamed-Slim Alouini3
  • 1: Texas A&M University at Qatar
  • 2: Texas A&M University
  • 3: KAUST
*Contact email: marwa@tamu.edu

Abstract

In this paper, we develop multiuser access schemes for spectrum sharing systems whereby secondary users share the spectrum with primary users. In particular, we devise two schemes for selecting the user among those that satisfy the interference constraints and achieve an acceptable signal-to-noise ratio (SNR) level. The first scheme selects the user with the maximum SNR at the receiver, whereas in the second scheme the users are scanned in a sequential manner until an acceptable user is found. In addition, we consider two power adaptive settings. In the on/off power adaptive setting, the users transmit based on whether the interference constraint is met or not while in the full power adaptive setting, the users vary their transmission power to satisfy the interference constraint. Finally, we present numerical results of our proposed algorithms where we show the trade-off between the average spectral efficiency and average feedback load of both schemes.