Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission

Yijie Mao, Bruno Clercks, Victor O.K. Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

In a superimposed unicast and multicast transmission system, one layer of Successive Interference Cancellation (SIC) is required at each receiver to remove the multicast stream before decoding the unicast stream. In this paper, we show that a linearly-precoded Rate-Splitting (RS) strategy at the transmitter can efficiently exploit this existing SIC receiver architecture. By splitting the unicast messages into common and private parts and encoding the common parts along with the multicast message into a super-common stream decoded by all users, the SIC is used for the dual purpose of separating the unicast and multicast streams as well as better managing the multi-user interference between the unicast streams. The precoders are designed with the objective of maximizing the Weighted Sum Rate (WSR) of the unicast messages subject to a Quality of Service (QoS) requirement of the multicast message and a sum power constraint. Numerical results show that RS outperforms existing Multi-User Linear-Precoding (MU-LP) and power-domain Non-Orthogonal Multiple Access (NOMA) in a wide range of user deployments (with a diversity of channel directions and channel strengths). Moreover, since one layer of SIC is required to separate the unicast and multicast streams, the performance gain of RS comes without any increase in the receiver complexity compared with MU-LP. Hence, in such non-orthogonal unicast and multicast transmissions, RS provides rate and QoS enhancements at no extra cost for the receivers.

Original languageEnglish
Title of host publication2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Volume2018-June
ISBN (Print)9781538635124
DOIs
Publication statusPublished - 2018 Aug 24
Externally publishedYes
Event19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 - Kalamata, Greece
Duration: 2018 Jun 252018 Jun 28

Other

Other19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
CountryGreece
CityKalamata
Period18/6/2518/6/28

Fingerprint

Quality of service
Antennas
Decoding
Transmitters
Costs

Keywords

  • non-orthogonal multicast and unicast transmission
  • rate region
  • rate-splitting
  • WMMSE algorithm

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Information Systems

Cite this

Mao, Y., Clercks, B., & Li, V. O. K. (2018). Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission. In 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 (Vol. 2018-June). [8445774] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SPAWC.2018.8445774

Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission. / Mao, Yijie; Clercks, Bruno; Li, Victor O.K.

2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018. Vol. 2018-June Institute of Electrical and Electronics Engineers Inc., 2018. 8445774.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mao, Y, Clercks, B & Li, VOK 2018, Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission. in 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018. vol. 2018-June, 8445774, Institute of Electrical and Electronics Engineers Inc., 19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018, Kalamata, Greece, 18/6/25. https://doi.org/10.1109/SPAWC.2018.8445774
Mao Y, Clercks B, Li VOK. Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission. In 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018. Vol. 2018-June. Institute of Electrical and Electronics Engineers Inc. 2018. 8445774 https://doi.org/10.1109/SPAWC.2018.8445774
Mao, Yijie ; Clercks, Bruno ; Li, Victor O.K. / Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission. 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018. Vol. 2018-June Institute of Electrical and Electronics Engineers Inc., 2018.
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