Finite-SNR Bounds on the Sum-Rate Capacity of Rayleigh Block-Fading Multiple-Access Channels With No A Priori CSI

Devassy, R. and Durisi, Giuseppe and Ostman, J. and Yang, Wei and Eftimov, Tome and Utkovski, Zoran (2015) Finite-SNR Bounds on the Sum-Rate Capacity of Rayleigh Block-Fading Multiple-Access Channels With No A Priori CSI. IEEE Transactions on Communications, 63 (10). pp. 3621-3632. ISSN 0090-6778

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Abstract

We provide nonasymptotic upper and lower bounds on the sum-rate capacity of Rayleigh block-fading multiple-access channels for the set up where a priori channel state information is not available. The upper bound relies on a dual formula for channel capacity and on the assumption that the users can cooperate perfectly. The lower bound is derived assuming a noncooperative scenario where each user employs unitary space-time modulation (independently from the other users). Numerical results show that the gap between the upper and the lower bound is small already at moderate SNR values. This suggests that the sum-rate capacity gains obtainable through user cooperation are minimal for the scenarios considered in the paper.

Item Type: Article
Uncontrolled Keywords: Rayleigh channels;channel capacity;cooperative communication;modulation;multi-access systems;multiuser channels;Rayleigh block-fading multiple-access channels;channel capacity;finite-SNR bounds;lower bound;multiuser channels;noncooperative scenario;sum-rate capacity;unitary space-time modulation;upper bound;user cooperation;Coherence;Random variables;Receiving antennas;Signal to noise ratio;Transmitting antennas;Upper bound;Channel capacity;channel state information;multiuser channels;time-varying channels
Subjects: Engineering and Technology > Electrical engineering, electronic engineering, information engineering
Divisions: Faculty of Electrical Engineering
Depositing User: Zoran Utkovski
Date Deposited: 11 Nov 2015 11:28
Last Modified: 11 Nov 2015 11:28
URI: http://eprints.ugd.edu.mk/id/eprint/14208

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