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Fast Channel Estimation in the Transformed Spatial Domain for Analog Millimeter Wave Systems
Univ Valencia, Comp Sci Dept, Burjassot 46100, Spain..
Univ Valencia, Comp Sci Dept, Burjassot 46100, Spain..
Univ Valencia, Comp Sci Dept, Burjassot 46100, Spain..
KTH, School of Electrical Engineering and Computer Science (EECS), Intelligent systems, Decision and Control Systems (Automatic Control). Ericsson Res, S-16400 Stockholm, Sweden..ORCID iD: 0000-0002-2289-3159
2021 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 20, no 9, p. 5926-5941Article in journal (Refereed) Published
Abstract [en]

Fast channel estimation in millimeter-wave (mmWave) systems is a fundamental enabler of high-gain beamforming, which boosts coverage and capacity. The channel estimation stage typically involves an initial beam training process where a subset of the possible beam directions at the transmitter and receiver is scanned along a predefined codebook. Unfortunately, the high number of transmit and receive antennas deployed in mmWave systems increase the complexity of the beam selection and channel estimation tasks. In this work, we tackle the channel estimation problem in analog systems from a different perspective than used by previous works. In particular, we propose to move the channel estimation problem from the angular domain into the transformed spatial domain, in which estimating the angles of arrivals and departures corresponds to estimating the angular frequencies of paths constituting the mmWave channel. The proposed approach, referred to as transformed spatial domain channel estimation (TSDCE) algorithm, exhibits robustness to additive white Gaussian noise by combining low-rank approximations and sample autocorrelation functions for each path in the transformed spatial domain. Numerical results evaluate the mean square error of the channel estimation and the direction of arrival estimation capability. TSDCE significantly reduces the first, while exhibiting a remarkably low computational complexity compared with well-known benchmarking schemes.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2021. Vol. 20, no 9, p. 5926-5941
Keywords [en]
Channel estimation, Wireless communication, Radio frequency, Discrete Fourier transforms, Broadband antennas, Array signal processing, Estimation, mmWave, analog beamforming, transformed spatial domain, 2D autocorrelation
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-302595DOI: 10.1109/TWC.2021.3071315ISI: 000694698500035Scopus ID: 2-s2.0-85104237962OAI: oai:DiVA.org:kth-302595DiVA, id: diva2:1606552
Note

QC 20211027

Available from: 2021-10-27 Created: 2021-10-27 Last updated: 2022-06-25Bibliographically approved

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Fodor, Gábor

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