7th International Conference on Cognitive Radio Oriented Wireless Networks

Research Article

Near Optimal Power Allocation Algorithm for OFDM-Based Cognitive Using Adaptive Relaying Strategy

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2012.248500,
        author={Hamza SOURY and Faouzi Bader and Musbah Shaat and Mohamed-Slim Alouini},
        title={Near Optimal Power Allocation Algorithm for OFDM-Based Cognitive Using Adaptive Relaying Strategy},
        proceedings={7th International Conference on Cognitive Radio Oriented Wireless Networks},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={7},
        keywords={cognitive radio adaptive relaying protocol multicarrier ofdm power allocation decode-and-forward amplify-and-forward pairing},
        doi={10.4108/icst.crowncom.2012.248500}
    }
    
  • Hamza SOURY
    Faouzi Bader
    Musbah Shaat
    Mohamed-Slim Alouini
    Year: 2012
    Near Optimal Power Allocation Algorithm for OFDM-Based Cognitive Using Adaptive Relaying Strategy
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2012.248500
Hamza SOURY1,*, Faouzi Bader2, Musbah Shaat3, Mohamed-Slim Alouini4
  • 1: Electrical Engineering King Abdullah University for Science and Technology Saudi Arabia
  • 2: Access Technologies CTTC Centre Tecnologic de Telecomunicacions de Catalunya Spain
  • 3: Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) Spain
  • 4: EE Program KAUST Saudi Arabia
*Contact email: soury.hamza@kaust.edu.sa

Abstract

Relayed transmission increases the coverage and achievable capacity of communication systems. Adaptive relaying scheme is a relaying technique by which the benefits of the amplifying or decode and forward techniques can be achieved by switching the forwarding technique according to the quality of the signal. A cognitive Orthogonal Frequency-Division Multiplexing (OFDM) based adaptive relaying protocol is considered in this paper. The objective is to maximize the capacity of the cognitive radio system while ensuring that the interference introduced to the primary user is below the tolerated limit. A Near optimal power allocation in the source and the relay is presented for two pairing techniques such that the matching and random pairing. The simulation results confirm the efficiency of the proposed adaptive relaying protocol, and the consequence of choice of pairing technique.