Ergodic capacity of MIMO faster-than-nyquist transmission over triply-selective rayleigh fading channels

Wen, S., Liu, G., Xu, F., Zhang, L. , Liu, C. and Imran, M. A. (2022) Ergodic capacity of MIMO faster-than-nyquist transmission over triply-selective rayleigh fading channels. IEEE Transactions on Communications, 70(8), pp. 5046-5058. (doi: 10.1109/TCOMM.2022.3185291)

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Faster-than-Nyquist signaling (FTNS) has already been shown to increase the communication capacity on certain channels such as additive white Gaussian noise and block flat multiple-input multiple-output (MIMO) Rayleigh fading channels. The following issues, however, remain unresolved: 1) whether FTNS enables a capacity increase in generalized MIMO Rayleigh fading channels that are selective in time, frequency, and space; and 2) how channel selectivities affect the capacity and if present, the FTN capacity gain. To address the issues, this paper firstly investigates the ergodic capacity of MIMO-FTN transmission over triply-selective fading channels. We derive a low-complexity approximate capacity formula and also show how it degenerates in other channel models, such as doubly-selective single-input single-output fading channels, which can be considered as the special cases of triply-selective fading channels. The capacity evaluation results obtained under different channel conditions show that: 1) MIMO-FTN outperforms MIMO-Nyquist in terms of capacity; 2) the FTN gains are nearly consistent, while the FTN gains obtained in the frequency-selective fading channels are slightly higher than those obtained in the flat fading channels.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Zhang, Professor Lei and Imran, Professor Muhammad
Authors: Wen, S., Liu, G., Xu, F., Zhang, L., Liu, C., and Imran, M. A.
College/School:College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
Journal Name:IEEE Transactions on Communications
ISSN (Online):1558-0857
Published Online:22 June 2022
Copyright Holders:Copyright © 2022 IEEE
First Published:First published in IEEE Transactions on Communications 70(8): 5046-5058
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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