Low-Complexity Subspace-Based Multi-User Hybrid Precoding

We propose a novel multi-user hybrid precoder design that imitates the bit error rate (BER) performance of a given fully digital precoder by minimizing the Frobenious norm between them. We show that the proposed design equivalently minimizes the chordal distance between the column spaces of the phas...

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Bibliographic Details
Published in:IEEE communications letters Vol. 23; no. 2; pp. 222 - 225
Main Authors: Dutta, Biswajit, Budhiraja, Rohit, Koilpillai, Ravinder D.
Format: Journal Article
Language:English
Published: New York IEEE 01.02.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Antennas
Baseband
Bit error rate
Chordal distance
Complexity
Complexity theory
hybrid precoder
MIMO communication
Precoding
Radio frequency
subspace
ISSN:1089-7798, 1558-2558
Online Access:Get full text
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Summary:We propose a novel multi-user hybrid precoder design that imitates the bit error rate (BER) performance of a given fully digital precoder by minimizing the Frobenious norm between them. We show that the proposed design equivalently minimizes the chordal distance between the column spaces of the phase-only RF precoder and the given fully digital precoder. The proposed design, in the large antenna regime, has the same BER as that of an existing optimal hybrid precoder design but with much reduced complexity. Furthermore, the proposed design is also shown to approach the BER of a given fully digital precoder.
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ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2018.2883739