- Title
- Leveraging receiver message side information in two-receiver broadcast channels: a general approach
- Creator
- Asadi, Behzad; Ong, Lawrence; Johnson, Sarah J.
- Relation
- Funding BodyARCGrant NumberFT110100195 http://purl.org/au-research/grants/arc/FT110100195
- Relation
- Entropy Vol. 19, Issue 4, no. 138
- Publisher Link
- http://dx.doi.org/10.3390/e19040138
- Publisher
- MDPI AG
- Resource Type
- journal article
- Date
- 2017
- Description
- We consider two-receiver broadcast channels where each receiver may know a priori some of the messages requested by the other receiver as receiver message side information (RMSI). We devise a general approach to leverage RMSI in these channels. To this end, we first propose a pre-coding scheme considering the general message setup where each receiver requests both common and private messages and knows a priori part of the private message requested by the other receiver as RMSI. We then construct the transmission scheme of a two-receiver channel with RMSI by applying the proposed pre-coding scheme to the best transmission scheme for the channel without RMSI. To demonstrate the effectiveness of our approach, we apply our pre-coding scheme to three categories of the two-receiver discrete memoryless broadcast channel: (i) channel without state; (ii) channel with states known causally to the transmitter; and (iii) channel with states known non-causally to the transmitter. We then derive a unified inner bound for all three categories. We show that our inner bound is tight for some new cases in each of the three categories, as well as all cases whose capacity region was known previously.
- Subject
- broadcast channel; capacity region; receiver message side information; channel state information
- Identifier
- http://hdl.handle.net/1959.13/1396829
- Identifier
- uon:34134
- Identifier
- ISSN:1099-4300
- Rights
- © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
- Language
- eng
- Full Text
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