Joint Power-control and Antenna Selection in User-Centric Cell-Free Systems with Mixed Resolution ADC
Artikel i vetenskaplig tidskrift, 2022

In this paper, we propose a scheme for the joint optimization of the user transmit power and the antenna selection at the access points (AP)s of a user-centric cell-free massive multiple-input-multiple-output (UC CF-mMIMO) system. We derive an approximate expression for the achievable uplink rate of the users in a UC CF-mMIMO system in the presence of a mixed analog-to-digital converter (ADC) resolution profile at the APs. Using the derived approximation, we propose to maximize the uplink sum-rate of UC CF-mMIMO systems subject to energy constraints at the APs. An alternating-optimization solution is proposed using binary particle swarm optimization (BPSO) and successive convex approximation (SCA). We also propose a complete meta-heuristic-based solution that can be used as an alternative solution for applications where latency is the critical metric. Along with this, we used a genetic algorithm (GA)-based approach to compare the performance of the proposed algorithm. We study the impact of various system parameters on the performance of the system.

Uplink

Antennas

Power demand

Energy efficiency

Power control

Optimization

Energy resolution

Författare

Shashank Shekhar

Indian Institute of Technology

Athira Subhash

Indian Institute of Technology

Muralikrishnan Srinivasan

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Sheetal Kalyani

Indian Institute of Technology

IEEE Transactions on Communications

00906778 (ISSN) 15580857 (eISSN)

Vol. 70 12 8400-8415

Ämneskategorier

Telekommunikation

Kommunikationssystem

Signalbehandling

DOI

10.1109/TCOMM.2022.3218835

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2024-05-29