A low-complexity beamforming method by orthogonal codebooks for millimeterwave links
Hsiao-Lan Chiang, Wolfgang Rave, Tobias Kadur, Gerhard P. Fettweis
Abstract
Combining analog with digital beamforming in the sense of hybrid beamforming is one of the promising solutions to maximize throughput for millimeter wave links. Due to a concern of complexity, codebooks used in the analog beamforming are limited to their size. This paper shows that if the limited codebooks are made up of orthogonal steering vectors, the analog beamforming can be implemented with low complexity by exploiting implicit knowledge of the channel and then the resulting effective channel should be estimated explicitly to determine the optimal weighting coefficients in the digital beamforming. The simulation results show that the proposed low-complexity beamforming method can achieve nearly the same data rates as the one with perfectly known channel state information.
BibTeX
@inproceedings{icassp2017_alowcomplexitybe,
title = {A low-complexity beamforming method by orthogonal codebooks for millimeterwave links},
author = {Hsiao-Lan Chiang and Wolfgang Rave and Tobias Kadur and Gerhard P. Fettweis},
booktitle = {ICASSP 2017},
year = {2017}
}