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Soft-Output Detector for Uplink MU-MIMO Systems With One-Bit ADCs

Title
Soft-Output Detector for Uplink MU-MIMO Systems With One-Bit ADCs
Authors
Hong, Song-NamLee, Namyoon
Date Issued
May-2018
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Abstract
We consider an uplink multiuser multiple-input multiple-output (MU-MIMO) system with one-bit analog-to-digital converters (ADCs). In this system, numerous symbol detectors, such as maximum-likelihood, zero-forcing, and supervised-learning-based detectors, have been proposed by using one-bit quantized channel outputs. The limitation of these hard-decision detectors cannot generate soft outputs from one-bit quantized channel observations, which considerably degrades the performance of a following channel code. To address this problem, in this letter, we present a novel soft-output detector, in which a soft-metric is computed in (binary) Hamming space using weighted Hamming distances. Simulation results demonstrate that the proposed detector can significantly outperform the other detectors for a coded MU-MIMO system with one-bit ADCs.
URI
http://oasis.postech.ac.kr/handle/2014.oak/95898
ISSN
1089-7798
Article Type
Article
Citation
IEEE COMMUNICATIONS LETTERS, vol. 22, no. 5, page. 930 - 933, 2018-05
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 LEE, NAMYOON
Dept of Electrical Enginrg
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