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    On the MIMO Capacity with Multiple Linear Transmit Covariance Constraints


    Pham, Thuy M. and Farrell, Ronan and Claussen, Holger and Flanagan, Mark and Tran, Le-Nam (2018) On the MIMO Capacity with Multiple Linear Transmit Covariance Constraints. Proceeings of 2018 IEEE 87th Vehicular Technology Conference (VTC Spring). pp. 1-6. ISSN 2577-2465

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    Abstract

    This paper presents an efficient approach to computing the capacity of multiple-input multiple-output (MIMO) channels under multiple linear transmit covariance constraints (LTCCs). LTCCs are general enough to include several special types of power constraints as special cases such as the sum power constraint (SPC), per-antenna power constraint (PAPC), or a combination thereof. Despite its importance and generality, most of the existing literature considers either SPC or PAPC independently. Efficient solutions to the computation of the MIMO capacity with a combination of SPC and PAPC have been recently reported, but were only dedicated to multipleinput single-output (MISO) systems. For the general case of LTCCs, we propose a low-complexity semi-closed-form approach tothecomputationoftheMIMOcapacity.Specifically,amodified minimax duality is first invoked to transform the considered problem in the broadcast channel into an equivalent minimax problem in the dual multiple access channel. Then alternating optimization and concave-convex procedure are utilized to derive water-filling-based algorithms to find a saddle point of the minimax problem. This is different from the state-of-the-art solutions to the considered problem, which are based on interiorpoint or subgradient methods. Analytical and numerical results are provided to demonstrate the effectiveness of the proposed low-complexity solution under various MIMO scenarios.

    Item Type: Article
    Keywords: MIMO Capacity; Multiple Linear; Transmit Covariance; Constraints;
    Academic Unit: Faculty of Science and Engineering > Computer Science
    Item ID: 12682
    Identification Number: https://doi.org/10.1109/VTCSpring.2018.8417596
    Depositing User: Ronan Farrell
    Date Deposited: 02 Apr 2020 10:33
    Journal or Publication Title: Proceeings of 2018 IEEE 87th Vehicular Technology Conference (VTC Spring)
    Publisher: IEEE
    Refereed: Yes
    URI:

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