The University of Southampton
University of Southampton Institutional Repository

NOMA-Aided joint radar and multicast-unicast communication systems

NOMA-Aided joint radar and multicast-unicast communication systems
NOMA-Aided joint radar and multicast-unicast communication systems

The novel concept of non-orthogonal multiple access (NOMA) aided joint radar and multicast-unicast communication (Rad-MU-Com) is investigated. Employing the same spectrum resource, a multi-input-multi-output (MIMO) dual-functional radar-communication (DFRC) base station detects the radar-centric users (R-user), while transmitting mixed multicast-unicast messages both to the R-user and to the communication-centric user (C-user). In particular, the multicast information is intended for both the R- and C-users, whereas the unicast information is only intended for the C-user. More explicitly, NOMA is employed to facilitate this double spectrum sharing, where the multicast and unicast signals are superimposed in the power domain and the superimposed communication signals are also exploited as radar probing waveforms. First, a beamformer-based NOMA-aided joint Rad-MU-Com framework is proposed for the system having a single R-user and a single C-user. Based on this framework, the unicast rate maximization problem is formulated by optimizing the beamformers employed, while satisfying the rate requirement of multicast and the predefined accuracy of the radar beam pattern. The resultant non-convex optimization problem is solved by a penalty-based iterative algorithm to find a high-quality near-optimal solution. Next, the system is extended to the scenario of multiple pairs of R- and C-users, where a cluster-based NOMA-aided joint Rad-MU-Com framework is proposed. A joint beamformer design and power allocation optimization problem is formulated for the maximization of the sum of the unicast rate at each C-user, subject to the constraints on both the minimum multicast rate for each R&C pair and on accuracy of the radar beam pattern for detecting multiple R-users. The resultant joint optimization problem is efficiently solved by another penalty-based iterative algorithm developed. Finally, our numerical results reveal that significant performance gains can be achieved by the proposed schemes over the benchmark schemes employing conventional transmission strategies.

Beamformer design, dual-functional radar-communication system, Interference, multicast-unicast communication, NOMA, non-orthogonal multiple access, Optimization, Radar, Radar detection, Radar imaging, spectrum sharing, Unicast
0733-8716
1978 - 1992
Mu, Xidong
0c966110-53a8-46e4-993c-c864483b54ce
Liu, Yuanwei
2767c2bc-6199-4106-ac28-81c3dadcfa29
Guo, Li
6e059923-7e0e-48f6-9d20-430ac7861d26
Lin, Jiaru
7bb1a08f-0973-4158-b9ea-aaa2c034a0cc
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Mu, Xidong
0c966110-53a8-46e4-993c-c864483b54ce
Liu, Yuanwei
2767c2bc-6199-4106-ac28-81c3dadcfa29
Guo, Li
6e059923-7e0e-48f6-9d20-430ac7861d26
Lin, Jiaru
7bb1a08f-0973-4158-b9ea-aaa2c034a0cc
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Mu, Xidong, Liu, Yuanwei, Guo, Li, Lin, Jiaru and Hanzo, Lajos (2022) NOMA-Aided joint radar and multicast-unicast communication systems. IEEE Journal on Selected Areas in Communications, 40 (6), 1978 - 1992. (doi:10.1109/JSAC.2022.3155524).

Record type: Article

Abstract

The novel concept of non-orthogonal multiple access (NOMA) aided joint radar and multicast-unicast communication (Rad-MU-Com) is investigated. Employing the same spectrum resource, a multi-input-multi-output (MIMO) dual-functional radar-communication (DFRC) base station detects the radar-centric users (R-user), while transmitting mixed multicast-unicast messages both to the R-user and to the communication-centric user (C-user). In particular, the multicast information is intended for both the R- and C-users, whereas the unicast information is only intended for the C-user. More explicitly, NOMA is employed to facilitate this double spectrum sharing, where the multicast and unicast signals are superimposed in the power domain and the superimposed communication signals are also exploited as radar probing waveforms. First, a beamformer-based NOMA-aided joint Rad-MU-Com framework is proposed for the system having a single R-user and a single C-user. Based on this framework, the unicast rate maximization problem is formulated by optimizing the beamformers employed, while satisfying the rate requirement of multicast and the predefined accuracy of the radar beam pattern. The resultant non-convex optimization problem is solved by a penalty-based iterative algorithm to find a high-quality near-optimal solution. Next, the system is extended to the scenario of multiple pairs of R- and C-users, where a cluster-based NOMA-aided joint Rad-MU-Com framework is proposed. A joint beamformer design and power allocation optimization problem is formulated for the maximization of the sum of the unicast rate at each C-user, subject to the constraints on both the minimum multicast rate for each R&C pair and on accuracy of the radar beam pattern for detecting multiple R-users. The resultant joint optimization problem is efficiently solved by another penalty-based iterative algorithm developed. Finally, our numerical results reveal that significant performance gains can be achieved by the proposed schemes over the benchmark schemes employing conventional transmission strategies.

Text
lajos_jsac - Accepted Manuscript
Download (991kB)
Text
NOMA-Aided_Joint_Radar_and_Multicast-Unicast_Communication_Systems - Version of Record
Restricted to Repository staff only
Request a copy

More information

Accepted/In Press date: 14 January 2022
e-pub ahead of print date: 4 March 2022
Published date: 1 June 2022
Additional Information: Publisher Copyright: © 1983-2012 IEEE.
Keywords: Beamformer design, dual-functional radar-communication system, Interference, multicast-unicast communication, NOMA, non-orthogonal multiple access, Optimization, Radar, Radar detection, Radar imaging, spectrum sharing, Unicast

Identifiers

Local EPrints ID: 456415
URI: http://eprints.soton.ac.uk/id/eprint/456415
ISSN: 0733-8716
PURE UUID: 99b2ace1-30a6-4683-a86a-133c9f194045
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 28 Apr 2022 16:36
Last modified: 17 Oct 2024 01:32

Export record

Altmetrics

Contributors

Author: Xidong Mu
Author: Yuanwei Liu
Author: Li Guo
Author: Jiaru Lin
Author: Lajos Hanzo ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×