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    Rate Maximization in MIMO Decode-and-Forward Communications With an EH Relay and Possibly Imperfect CSI

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    Type
    Article
    Authors
    Benkhelifa, Fatma cc
    Salem, Ahmed Sultan
    Alouini, Mohamed-Slim cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Date
    2016-08-29
    Online Publication Date
    2016-08-29
    Print Publication Date
    2016-11
    Permanent link to this record
    http://hdl.handle.net/10754/622593
    
    Metadata
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    Abstract
    In this paper, we investigate the simultaneous wireless information and power transfer (SWIPT) in a multiple-input multiple-output (MIMO) decode-and-forward (DF) relay system where the relay is an energy harvesting (EH) multi-antenna node equipped with an EH receiver and an information decoding (ID) receiver. The relay harvests the energy from the radio frequency (RF) signals sent by the source and uses it to forward the signals to the destination. The main objective in this paper is to maximize the achievable transmission rate of the overall link by optimizing the source/relay precoders. First, we study an upper bound on the maximum achievable rate where we assume that the EH and ID receivers operate simultaneously and have access to the whole power of the received signals. Afterwards, we study two practical schemes, which are the power splitting (PS) and time switching (TS) schemes, where the ID and EH receivers have partial access to the power or duration of the received signals. For each scheme, we have studied the complexity and the performance comparison. In addition, we considered the case of the imperfect channel estimation error and we have observed its impact on the achievable end-to-end rate and the harvested energy at the relay. © 1972-2012 IEEE.
    Citation
    Benkhelifa F, Salem AS, Alouini M-S (2016) Rate Maximization in MIMO Decode-and-Forward Communications With an EH Relay and Possibly Imperfect CSI. IEEE Transactions on Communications 64: 4534–4549. Available: http://dx.doi.org/10.1109/TCOMM.2016.2603989.
    Sponsors
    This paper was funded by a Sensor Initiative grant from the office of competitive research funding (OCRF) at KAUST in Saudi Arabia and accepted in part at IEEE 81st Vehicular Technology Conference (VTC'2015-Spring), Glasgow, Scotland. The associate editor coordinating the review of this paper and approving it for publication was Z. Ding.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Communications
    DOI
    10.1109/TCOMM.2016.2603989
    Additional Links
    http://ieeexplore.ieee.org/document/7555367/
    ae974a485f413a2113503eed53cd6c53
    10.1109/TCOMM.2016.2603989
    Scopus Count
    Collections
    Articles; Electrical and Computer Engineering Program; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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