Channel Estimation and User Identification with Deep Learning for Massive Machine-Type Communications

Liu B, Wei Z, Yuan W, Yuan J, Pajovic M (2021)

Publication Type: Journal article

Publication year: 2021

Journal

IEEE Transactions on Vehicular Technology Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 70

Pages Range: 10709-10722

Journal Issue: 10

DOI: 10.1109/TVT.2021.3111081

Abstract

In this paper, we investigate the detection problem for a massive machine-type communication (mMTC) system that has correlated user activities. Two deep learning assisted algorithms are proposed to exploit the user activity correlation to facilitate channel estimation and user identification. Due to the dependency among user activities, conventional element-wise minimum mean square error (MMSE) denoiser used in the orthogonal approximate message passing (OAMP) algorithm cannot achieve satisfying performance during the two-step iterative process. Therefore, we propose a deep learning modified OAMP (DL-mOAMP) algorithm, which iteratively modifies the user activity ratio via exploiting the user activity correlation in the MMSE denoiser based on the estimated sequence during each OAMP iteration. Moreover, given a specific false alarm probability, a constant threshold employed in the conventional user identification is not optimal in the presence of user activity correlation. Thus, we propose a neural network framework that is dedicated to the user identification (DL-mOAMP-UI algorithm), which minimizes the missed detection probability under a pre-determined false alarm probability. Numerical results show that the proposed DL-mOAMP algorithm provides a substantial mean squared error performance gain compared to the conventional OAMP algorithm and the DL-mOAMP-UI algorithm can further improve the user identification accuracy of an mMTC system.

Authors with CRIS profile

Zhiqiang Wei Professur für Informationsübertragung

Involved external institutions

University of New South Wales (UNSW) AU Australia (AU) Analog Devices, Inc. (ADI) US United States (USA) (US)

How to cite

APA:

Liu, B., Wei, Z., Yuan, W., Yuan, J., & Pajovic, M. (2021). Channel Estimation and User Identification with Deep Learning for Massive Machine-Type Communications. IEEE Transactions on Vehicular Technology, 70(10), 10709-10722. https://dx.doi.org/10.1109/TVT.2021.3111081

MLA:

Liu, Bryan, et al. "Channel Estimation and User Identification with Deep Learning for Massive Machine-Type Communications." IEEE Transactions on Vehicular Technology 70.10 (2021): 10709-10722.

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