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

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.

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1 user has voted: Yijie Mao

Paper Details

Authors:
Bruno Clerckx; Victor O.K. Li
Submitted On:
20 June 2018 - 9:34am
Short Link:
Type:
Poster
Event:
Presenter's Name:
Yijie Mao
Paper Code:
1570433105
Document Year:
2018
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Document Files

spawc poster_maoyijie.pdf

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[1] Bruno Clerckx; Victor O.K. Li, "Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission", IEEE SigPort, 2018. [Online]. Available: http://sigport.org/3248. Accessed: Oct. 18, 2019.
@article{3248-18,
url = {http://sigport.org/3248},
author = {Bruno Clerckx; Victor O.K. Li },
publisher = {IEEE SigPort},
title = {Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission},
year = {2018} }
TY - EJOUR
T1 - Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission
AU - Bruno Clerckx; Victor O.K. Li
PY - 2018
PB - IEEE SigPort
UR - http://sigport.org/3248
ER -
Bruno Clerckx; Victor O.K. Li. (2018). Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission. IEEE SigPort. http://sigport.org/3248
Bruno Clerckx; Victor O.K. Li, 2018. Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission. Available at: http://sigport.org/3248.
Bruno Clerckx; Victor O.K. Li. (2018). "Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission." Web.
1. Bruno Clerckx; Victor O.K. Li. Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission [Internet]. IEEE SigPort; 2018. Available from : http://sigport.org/3248