Joint Power and Subcarrier Allocation Optimization for Multigroup Multicast Systems with Rate Splitting

Hongzhi Chen, De Mi, Bruno Clerckx, Zheng Chu, Jia Shi, Pei Xiao

Research output: Journal PublicationReview articlepeer-review

31 Citations (Scopus)

Abstract

In this article, we investigate a resource allocation problem for multicarrier multiuser MISO (multiple-input-Single-output) downlink systems, where multiple co-channel multicast groups are served simultaneously. We consider a rate-splitting transmission scheme to address the inevitable inter-group interference under an overloaded multigroup multicast scenario, where the insufficient number of transmit antennas prevents the conventional schemes from neutralizing the interference. We first formulate an optimization problem for maximizing the minimum multicast group rate among all groups on all available subcarriers. This problem involves a joint power and subcarrier allocation optimization, and is non-convex. We apply an iterative scheme based on successive convex approximation (SCA) to find the locally optimal solution. Simulation results demonstrate the performance gain of the proposed scheme compared to the state-of-the-art transmission schemes.

Original languageEnglish
Article number8926413
Pages (from-to)2306-2310
Number of pages5
JournalIEEE Transactions on Vehicular Technology
Volume69
Issue number2
DOIs
Publication statusPublished - Feb 2020
Externally publishedYes

Keywords

  • convergence
  • joint optimization
  • max-min fairness
  • multicarrier
  • Multigroup multicast
  • overloaded scenarios
  • rate-splitting

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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