Energy Efficiency and Optimal Power Allocation in Virtual-MIMO Systems

Jiang, Jing, Dianati, Mehrdad, Imran, Muhammad Ali and Chen, Yan (2012) Energy Efficiency and Optimal Power Allocation in Virtual-MIMO Systems. In: 2012 IEEE Vehicular Technology Conference (VTC Fall). IEEE, pp. 1-6. ISBN 978-1-4673-1880-8

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This paper investigates energy efficiency (EE) performance of a virtual multiple-input multiple- output (MIMO) wireless system using the receiver- side cooperation with the compress-and-forward protocol. We derive a linear approximation of EE as a function of spectral efficiency (SE) in the low SE operation regime. In addition, we obtain a closed-form lower bound for EE which is valid for both low and high SE regions. This lower bound can be used for optimizing the power allocation between the transmitter and the relay in order to minimize the overall energy per bit consumption in the system. Both analytical and simulation results demonstrate that the virtual MIMO system using the receiver-side cooperation outperforms the multiple- input single-output (MISO) case in terms of energy efficiency. Finally we show that, with the optimal power allocation, the virtual-MIMO system achieves an EE performance close to that of an ideal MIMO system.

Item Type: Book Section
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 14 Dec 2018 12:26
Last Modified: 11 Oct 2019 15:02

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