Hybrid Jammer Mitigation for All-Digital mmWave Massive MU-MIMO
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Date
2021
Publication Type
Conference Paper
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yes
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Abstract
Low-resolution analog-to-digital converters (ADCs) simplify the design of millimeter-wave (mmWave) massive multi-user multiple-input multiple-output (MU-MIMO) basestations, but increase vulnerability to jamming attacks. As a remedy, we propose HERMIT (short for Hybrid jammER MITigation), a method that combines a hardware-friendly adaptive analog transform with a corresponding digital equalizer: The analog transform removes most of the jammer's energy prior to data conversion; the digital equalizer suppresses jammer residues while detecting the legitimate transmit data. We provide theoretical results that establish the optimal analog transform as a function of the user equipments' and the jammer's channels. Using simulations with mmWave channel models, we demonstrate the superiority of HERMIT compared both to purely digital jammer mitigation as well as to a recent hybrid method that mitigates jammer interference with a nonadaptive analog transform.
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published
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2021 55th Asilomar Conference on Signals, Systems, and Computers
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Pages / Article No.
93 - 99
Publisher
IEEE
Event
55th Asilomar Conference on Signals, Systems, and Computers (Asilomar SSC 2021)
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Software
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Organisational unit
09695 - Studer, Christoph / Studer, Christoph
Notes
Conference lecture held on November 2, 2021