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A Bound Based Method for Beamformer Design in Downlink Cloud Radio Access Networks
- Source :
- IEEE Communications Letters. 25:3350-3354
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- Cloud Radio Access Network is a candidate solution in 5G and beyond where we intend to serve as many users as possible with minimum transmit power and minimum fronthaul data transmission. In this study, we aim to maximize a mixed expression of the number of users served, the number of fronthaul links used, and the total transmitted power by beamforming optimization under imperfect channel state information. We find a theoretical upper bound and propose a method based on the bound derivation. We compare its performance with heuristic search and norm approximation methods solving a series of convex sub-problems. The detailed simulations show that the proposed method outperforms other baseline techniques in terms of the number of users served, fronthaul data rate, power consumption, and computational complexity.
- Subjects :
- Beamforming
Radio access network
Computational complexity theory
Computer science
business.industry
Cloud computing
Transmitter power output
Upper and lower bounds
Computer Science Applications
Computer engineering
Modeling and Simulation
Telecommunications link
Electrical and Electronic Engineering
business
Data transmission
Subjects
Details
- ISSN :
- 23737891 and 10897798
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- IEEE Communications Letters
- Accession number :
- edsair.doi...........f258b3fb0ddd8ac06d7943f304a00349