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Channel AoA Estimation for Massive MIMO Systems Using One-Bit ADCs

Title
Channel AoA Estimation for Massive MIMO Systems Using One-Bit ADCs
Authors
KIM, HWANJINCHOI, JUNIL
POSTECH Authors
CHOI, JUNIL
Date Issued
Aug-2018
Publisher
KOREAN INST COMMUNICATIONS SCIENCES (K I C S)
Abstract
Although massive multiple-input multiple-output (MIMO) can enhance the overall system performance significantly, it could suffer from high cost and power consumption issues due to using a large number of radio frequency (RF) chains. Two different approaches are commonly exploited to overcome these issues. The first approach is using hybrid beamforming, which consists of analog and digital beamforming, to reduce the total number of RF chains. The second approach is adopting low-resolution analog-to-digital converters (ADCs) for each RF chain. For both approaches, channel estimation becomes a difficult task. This paper addresses the problem of channel angle of arrival (AoA) estimation in massive MIMO using both hybrid beamforming and one-bit magnitude-aided (OMA) ADCs. An iterative algorithm is developed to estimate the channel AoA, and the appropriate threshold per iteration is analyzed. Numerical results show that the proposed technique can achieve sufficient AoA estimation performance with practical values of the signal-to-noise ratio (SNR).
Although massive multiple-input multiple-output (MIMO) can enhance the overall system performance significantly, it could suffer from high cost and power consumption issues due to using a large number of radio frequency (RF) chains. Two different approaches are commonly exploited to overcome these issues. The first approach is using hybrid beamforming, which consists of analog and digital beamforming, to reduce the total number of RF chains. The second approach is adopting low-resolution analog-to-digital converters (ADCs) for each RF chain. For both approaches, channel estimation becomes a difficult task. This paper addresses the problem of channel angle of arrival (AoA) estimation in massive MIMO using both hybrid beamforming and one-bit magnitude-aided (OMA) ADCs. An iterative algorithm is developed to estimate the channel AoA, and the appropriate threshold per iteration is analyzed. Numerical results show that the proposed technique can achieve sufficient AoA estimation performance with practical values of the signal-to-noise ratio (SNR).
Keywords
HYBRID; ANALOG; COMMUNICATION; RECEIVERS; WIRELESS; ANTENNAS
URI
http://oasis.postech.ac.kr/handle/2014.oak/93985
DOI
10.1109/JCN.2018.000053
ISSN
1229-2370
Article Type
Article
Citation
JOURNAL OF COMMUNICATIONS AND NETWORKS, vol. 20, no. 4, page. 374 - 382, 2018-08
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 CHOI, JUNIL
Dept of Electrical Enginrg
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