On index coding in noisy broadcast channels with receiver message side information

Title: On index coding in noisy broadcast channels with receiver message side information
Creator: Asadi, Behzad; Ong, Lawrence; Johnson, Sarah J.
Relation: ARC.FT110100195; DE120100246
Relation: IEEE Communications Letters Vol. 18, Issue 4, p. 640-643
Publisher Link: http://dx.doi.org/10.1109/LCOMM.2014.020414.132589
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Resource Type: journal article
Date: 2014
Description: This letter investigates the role of index coding in the capacity of AWGN broadcast channels with receiver message side information. We first show that index coding is unnecessary where there are two receivers; multiplexing coding and superposition coding are sufficient to achieve the capacity region. We next show that, for more than two receivers, multiplexing coding and superposition coding alone can be suboptimal. We give an example where these two coding schemes alone cannot achieve the capacity region, but adding index coding can. This demonstrates that, in contrast to the two-receiver case, multiplexing coding cannot fulfill the function of index coding where there are three or more receivers.
Subject: broadcast channels; receiver message side information; capacity; index coding; multiplexing coding; superposition coding
Identifier: http://hdl.handle.net/1959.13/1303203
Identifier: uon:20632
Identifier: ISSN:1089-7798
Language: eng
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