A Rate-Splitting Strategy for Max-Min Fair Multigroup Multicasting
File(s)
Accepted version
Author(s)
Joudeh, H
Clerckx, B
Type
Conference Paper
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.
Date Issued
2016-08-11
Date Acceptance
2016-04-18
Citation
2016, pp.1-5
ISBN
978-1-5090-1749-2
Publisher
IEEE
Start Page
1
End Page
5
Copyright Statement
© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Grant Number
EP/N015312/1
Source
IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
Publication Status
Published
Start Date
2016-07-03
Finish Date
2016-07-06
Coverage Spatial
Edinburgh, United Kingdom