IET Communications, ( ISI ), Volume (10), No (5), Year (2016-3) , Pages (508-524)

Title : ( Impact of the Relay on the Coverage Region of Multiple- Access Channels )

Authors: Seyed Ehsan Moeen Taghavi , Ghosheh Abed Hodtani ,

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From practical and theoretical viewpoints, performance analysis of communication systems by using information-theoretic results is important. In this paper, first, we obtain a general achievable rate region for three-user discrete memoryless (DM) Multiple Access Relay Channel (MARC) via partial decode and forward (DF) strategy and regular block Markov encoding/ backward decoding. Also by extending the discrete alphabet results to the continuous alphabet channel, an inner bound for three-user Gaussian MARC (GMARC) is achieved. Next, based on the inner bound of three-user GMARC, we analyze the impact of a relay on the coverage region of MARC, as a basic model for uplink communications between a base station and users with the help of a relay. This analysis includes the coverage region for the MAC and two-user GMARC as special cases. Considering rate regions for the Gaussian MARC and fading Gaussian MARC, it is proved that in a fixed transmission rate, the relay extends coverage region of the MARC. Numerical illustrations confirm our theoretical results.


, Three-user Multiple Access Relay Channel, Regular encoding/ backward decoding, Coverage region, Fixed desired transmission rates, Cellular
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author = {Moeen Taghavi, Seyed Ehsan and Abed Hodtani, Ghosheh},
title = {Impact of the Relay on the Coverage Region of Multiple- Access Channels},
journal = {IET Communications},
year = {2016},
volume = {10},
number = {5},
month = {March},
issn = {1751-8628},
pages = {508--524},
numpages = {16},
keywords = {Three-user Multiple Access Relay Channel; Regular encoding/ backward decoding; Coverage region; Fixed desired transmission rates; Cellular network},


%0 Journal Article
%T Impact of the Relay on the Coverage Region of Multiple- Access Channels
%A Moeen Taghavi, Seyed Ehsan
%A Abed Hodtani, Ghosheh
%J IET Communications
%@ 1751-8628
%D 2016