In this paper, we consider the downlink transmission for a dual-hop amplify-and-forward (AF) multiple-antenna relay systems, where we propose beamforming techniques for interference exploitation on a symbol level. Based on the constructive interference (CI), we firstly propose a joint source/relay precoding, where the precoding matrices at the source and the output signals at the relay are jointly optimized. To alleviate the high computational costs and circumvent the difficulty of practical implementation of the joint design, we further propose a low-complexity decoupled approach, where a closed-form linear precoding method is first employed at the source, and we then optimize the beamforming matrix at the relay for interference exploitation. It is revealed by numerical results that the proposed approaches that exploit the instantaneous interference can achieve an improved performance over the conventional case with a linear approach.


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    Title :

    Constructive Interference Beamforming for Cooperative Dual-Hop MIMO Relay Systems - Invited Paper


    Contributors:


    Publication date :

    2018-06-01


    Size :

    1159489 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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