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Massive MIMO Channel Estimation With an Untrained Deep Neural Network
Date
2020-03-01
Author
Balevi, Eren
Doshi, Akash
Andrews, Jeffrey G.
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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This paper proposes a deep learning-based channel estimation method for multi-cell interference-limited massive MIMO systems, in which base stations equipped with a large number of antennas serve multiple single-antenna users. The proposed estimator employs a specially designed deep neural network (DNN) based on the deep image prior (DIP) network to first denoise the received signal, followed by conventional least-squares (LS) estimation. We analytically prove that our LS-type deep channel estimator can approach minimum mean square error (MMSE) estimator performance for high-dimensional signals, while avoiding complex channel inversions and knowledge of the channel covariance matrix. This analytical result, while asymptotic, is observed in simulations to be operational for just 64 antennas and 64 subcarriers per OFDM symbol. The proposed method also does not require any training and utilizes several orders of magnitude fewer parameters than conventional DNNs. The proposed deep channel estimator is also robust to pilot contamination and can even completely eliminate it under certain conditions.
Subject Keywords
Deep learning
,
channel estimation
,
massive MIMO
,
OFDM
,
deep image prior
,
SYSTEMS
,
UPLINK
URI
https://hdl.handle.net/11511/100135
Journal
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
DOI
https://doi.org/10.1109/twc.2019.2962474
Collections
Department of Electrical and Electronics Engineering, Article
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BibTeX
E. Balevi, A. Doshi, and J. G. Andrews, “Massive MIMO Channel Estimation With an Untrained Deep Neural Network,”
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
, vol. 19, no. 3, pp. 2079–2090, 2020, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/100135.