A rate-splitting strategy for max-min fair multigroup multicasting

Hamdi Joudeh; Bruno Clerckx

doi:10.1109/SPAWC.2016.7536771

A rate-splitting strategy for max-min fair multigroup multicasting

Hamdi Joudeh, Bruno Clerckx

School of Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

19 Citations (Scopus)

Abstract

We consider the problem of transmit beamforming to multiple cochannel multicast groups. The conventional approach is to beamform a designated data stream to each group, while treating potential inter-group interference as noise at the receivers. In overloaded systems where the number of transmit antennas is insufficient to perform interference nulling, we show that inter-group interference dominates at high SNRs, leading to a saturating max-min fair performance. We propose a rather unconventional approach to cope with this issue based on the concept of Rate-Splitting (RS). In particular, part of the interference is broadcasted to all groups such that it is decoded and canceled before the designated beams are decoded. We show that the RS strategy achieves significant performance gains over the conventional multigroup multicast beamforming strategy.

Original language	English
Title of host publication	SPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781509017492
DOIs	https://doi.org/10.1109/SPAWC.2016.7536771
Publication status	Published - 2016 Aug 9
Event	17th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2016 - Edinburgh, United Kingdom Duration: 2016 Jul 3 → 2016 Jul 6

Publication series

Name	IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
Volume	2016-August

Other

Other	17th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2016
Country	United Kingdom
City	Edinburgh
Period	16/7/3 → 16/7/6

Keywords

Broadcasting
WMMSE approach
degrees of freedom
downlink beamforming
multicasting

ASJC Scopus subject areas

Electrical and Electronic Engineering
Computer Science Applications
Information Systems

Access to Document

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Joudeh, H., & Clerckx, B. (2016). A rate-splitting strategy for max-min fair multigroup multicasting. In SPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications [7536771] (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC; Vol. 2016-August). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SPAWC.2016.7536771

A rate-splitting strategy for max-min fair multigroup multicasting. / Joudeh, Hamdi; Clerckx, Bruno.

SPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications. Institute of Electrical and Electronics Engineers Inc., 2016. 7536771 (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC; Vol. 2016-August).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Joudeh, H & Clerckx, B 2016, A rate-splitting strategy for max-min fair multigroup multicasting. in SPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications., 7536771, IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, vol. 2016-August, Institute of Electrical and Electronics Engineers Inc., 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2016, Edinburgh, United Kingdom, 16/7/3. https://doi.org/10.1109/SPAWC.2016.7536771

Joudeh H, Clerckx B. A rate-splitting strategy for max-min fair multigroup multicasting. In SPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications. Institute of Electrical and Electronics Engineers Inc. 2016. 7536771. (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC). https://doi.org/10.1109/SPAWC.2016.7536771

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abstract = "We consider the problem of transmit beamforming to multiple cochannel multicast groups. The conventional approach is to beamform a designated data stream to each group, while treating potential inter-group interference as noise at the receivers. In overloaded systems where the number of transmit antennas is insufficient to perform interference nulling, we show that inter-group interference dominates at high SNRs, leading to a saturating max-min fair performance. We propose a rather unconventional approach to cope with this issue based on the concept of Rate-Splitting (RS). In particular, part of the interference is broadcasted to all groups such that it is decoded and canceled before the designated beams are decoded. We show that the RS strategy achieves significant performance gains over the conventional multigroup multicast beamforming strategy.",

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