Second-Order Achievable Rates for a Block Fading Gaussian Multiple Access Channel

Deekshith, PK and Sharma, V (2020) Second-Order Achievable Rates for a Block Fading Gaussian Multiple Access Channel. In: 2020 IEEE International Symposium on Information Theory, ISIT 2020, 21-26 July 2020, Los Angeles; United States, pp. 2326-2331.

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Abstract

In this work, we consider a Gaussian multiple access channel (GMAC) subject to block fading that is independent across users. We derive inner bounds on the capacity region for a given finite codeword length and non-vanishing average probability of error. We assume perfect channel state information (CSI) at the receiver (CSIR) and no CSI at the transmitters. The bounds are derived subject to a peak power constraint on the transmitted codewords. Our inner bounds are derived using Gaussian codebooks. These bounds characterize deviation from the ergodic capacity region upto second-order. Using numerical examples, we illustrate the back-off from the boundary of the ergodic capacity region. © 2020 IEEE.

Item Type:	Conference Paper
Publication:	IEEE International Symposium on Information Theory - Proceedings
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright of this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Channel capacity; Gaussian distribution, Average probability of error; Capacity regions; Ergodic capacity; Finite codeword lengths; Gaussian multiple-access channels; Peak-power constraints; Perfect channel state information; Second orders, Channel state information
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	27 Oct 2020 11:17
Last Modified:	27 Oct 2020 11:17
URI:	http://eprints.iisc.ac.in/id/eprint/66613

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