Wireless Internet. 10th International Conference, WiCON 2017, Tianjin, China, December 16-17, 2017, Proceedings

Research Article

Power Allocation for Full Duplex Decode-and-Forward Cooperative Relay System

  • @INPROCEEDINGS{10.1007/978-3-319-90802-1_33,
        author={Shuai Han and Yi Zhang and Weixiao Meng and Ningqing Liu},
        title={Power Allocation for Full Duplex Decode-and-Forward Cooperative Relay System},
        proceedings={Wireless Internet. 10th International Conference, WiCON 2017, Tianjin, China, December 16-17, 2017, Proceedings},
        proceedings_a={WICON},
        year={2018},
        month={5},
        keywords={Full-duplex Power allocation Relay Genetic algorithm},
        doi={10.1007/978-3-319-90802-1_33}
    }
    
  • Shuai Han
    Yi Zhang
    Weixiao Meng
    Ningqing Liu
    Year: 2018
    Power Allocation for Full Duplex Decode-and-Forward Cooperative Relay System
    WICON
    Springer
    DOI: 10.1007/978-3-319-90802-1_33
Shuai Han1, Yi Zhang1, Weixiao Meng1,*, Ningqing Liu1
  • 1: Harbin Institute of Technology
*Contact email: wxmeng@hit.edu.cn

Abstract

The 5G communication system requires higher data rates and energy efficiency. Full-duplex (FD) communications can double the spectral efficiency in ideal conditions and in full-duplex relay systems the relay node works under full-duplex mode. There is a trade off between the signal and interference at the relay node because the transmitting signal of the node can be interference signal and desired signal in different links in the system, respectively. Proper power allocation can both suppress the residual self-interference for better performance and save power of the FD system. In this paper, we propose a power allocation approximation algorithm and a power allocation method based on genetic algorithm (GA) for a FD decode-and-forward (DF) cooperative relay system with residual self-interference. The end-to-end outage probability is chosen as the criterion of power allocation problem. Both the global power constraint and individual power constraint are investigated. The approximation algorithm shows great simplicity and has better performance with high SNR. For GA algorithm, numerical results show that the proposed power allocation scheme obviously improves the performance of the FD relay system with good convergence performance.