This paper investigates a X-duplex decode-and-forward relay system in the presence of direct link from the source to destination. X-duplex relays can adaptively switch between half-duplex mode and full-duplex mode according to the instantaneous channel conditions. Unlike previous work on X-duplex relay, we treat the direct link as an additional information path and propose a new transmission scheme based on dirty paper coding (DPC). By using DPC as the precoding scheme at the source, the messages can be divided into two parts which are sent from the source to destination through the relay link and direct link, respectively. In addition, the destination performs successive interference cancellation as the decoding strategy. The optimal transmit powers at the source and relay by maximizing the end-to-end achievable rate are obtained. The numerical results show that the new transmission scheme achieves a better performance over the reference scheme.


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    Title :

    X-Duplex Decode-and-Forward Relaying with Direct Link: A DPC-Based Transmission Scheme


    Contributors:
    Liu, Peixi (author) / Jiang, Wei (author) / Luo, Wu (author) / Zhang, Tiansheng (author)


    Publication date :

    2020-05-01


    Size :

    242350 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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