Journal
IEEE COMMUNICATIONS LETTERS
Volume 25, Issue 8, Pages 2718-2722Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2021.3085965
Keywords
OFDM; Uplink; Discrete Fourier transforms; Frequency division multiplexing; Time-frequency analysis; Frequency-selective fading channels; Bandwidth; Cell-free massive MIMO; cell edge; frequency-selective fading channel; massive MIMO-OFDM; OFDM
Categories
Funding
- German Federal Ministry of Education and Research (BMBF) through the KICK project [16KIS1105]
- European Commission H2020 Framework Programme under the AI@EDGE project [H2020-ICT-2020-2/101015922]
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This letter introduces and analyzes OFDM-based multi-carrier transmission for cell-free massive MIMO over frequency-selective fading channels. The proposed system includes frequency-domain conjugate beamforming, pilot assignment, and user-specific resource allocation. It is scalable and flexible to accommodate a large number of users with diverse data rates for different applications.
This letter presents and analyzes orthogonal frequency-division multiplexing (OFDM)-based multi-carrier transmission for cell-free massive multi-input multi-output (CFmMIMO) over frequency-selective fading channels. Frequency-domain conjugate beamforming, pilot assignment, and user-specific resource allocation are proposed. The CFmMIMO-OFDM system is scalable to serve a massive number of users and is flexible to offer diverse data rates for heterogeneous applications.
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