Bi-Objective Power Optimization of Radio Stripe Uplink Communications

Conceição, Filipe; Gomes, Marco; Silva, Vitor; Dinis, Rui; Antunes, Carlos Henggeler

http://hdl.handle.net/10362/151087

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Autores

Antunes, Carlos Henggeler

Resumo(s)

The radio stripe (RS) system is a practical implementation of cell-free mMIMO, in which a set of multi-antenna access points (APs) serves at the same time-frequency resources the user equipment (UE) in the network. The APs are sequentially connected in a stripe, sharing the same fronthaul link to the central processing unit. This work considers an uplink power optimization problem that aims to enhance the network spectral efficiency (SE) by considering two metrics—the max–min fairness and the max–sum rate. We employ a meta-heuristic based on the differential evolution algorithm to solve the bi-objective optimization problem. The SE performances of the full power along with the single-objective and multiple-objective scenarios are analyzed and compared for the optimal sequential linear processing detection scheme. The bi-objective approach is able to unveil the trade-offs to identify solution balancing the SE distribution resulting from the optimization of the max–min fairness and the max–sum rate objective functions.

Descrição

Funding Information: Funding: This work is funded by FCT/MEC through national funds and when applicable co-funded by European Regional Development Fund (FEDER), the Competitiveness and Internationalization Operational Programme (COMPETE 2020) of the Portugal 2020 framework, Regional OP Centro (POCI-01-0145-FEDER-030588) and Regional Operational Program of Lisbon (Lisboa-01-0145-FEDER-030588) and Financial Support National Public (FCT)(OE), under the project UIBD/00308/2020. Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Palavras-chave

Cell-free (CF) Differential evolution (DE) Massive MIMO (mMIMO) Max–min Max–sum Multi-objective (MO) Power optimization Radio stripe (RS) Control and Systems Engineering Signal Processing Hardware and Architecture Computer Networks and Communications Electrical and Electronic Engineering