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. |
| Volume | 2016-August |
| ISBN (Electronic) | 9781509017492 |
| DOIs | |
| 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 |
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 |
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Keywords
- Broadcasting
- degrees of freedom
- downlink beamforming
- multicasting
- WMMSE approach
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Science Applications
- Information Systems
Cite this
A rate-splitting strategy for max-min fair multigroup multicasting. / Joudeh, Hamdi; Clercks, Bruno.
SPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications. Vol. 2016-August Institute of Electrical and Electronics Engineers Inc., 2016. 7536771.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - A rate-splitting strategy for max-min fair multigroup multicasting
AU - Joudeh, Hamdi
AU - Clercks, Bruno
PY - 2016/8/9
Y1 - 2016/8/9
N2 - 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.
AB - 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.
KW - Broadcasting
KW - degrees of freedom
KW - downlink beamforming
KW - multicasting
KW - WMMSE approach
UR - http://www.scopus.com/inward/record.url?scp=84984598793&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84984598793&partnerID=8YFLogxK
U2 - 10.1109/SPAWC.2016.7536771
DO - 10.1109/SPAWC.2016.7536771
M3 - Conference contribution
VL - 2016-August
BT - SPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications
PB - Institute of Electrical and Electronics Engineers Inc.
ER -