LANGUAGE English
SOURCE IEEE ICC 2017 Workshop, Paris, May 21-25, 2017
Published Date:2017-05
ABSTRACT
A spatial transformation scheme is proposed to be
deployed at the radio-units (RUs) in cloud radio-access-networks
(C-RAN) to alleviate the fronthaul burden and baseband signal
processing complexity. The module transforms antenna domain
signals to the beam domain, such that the spatial dimensionality
is significantly reduced for RUs with large antenna arrays. A
low-complexity transformation scheme is investigated with finite
uplink receive samples. It leverages a combined discrete-Fouriertransform
(C-DFT) approach, which shows significant signal
power gain over the conventional DFT scheme by combining
correlated DFT beams to form a more matched beam pattern.
The optimality of the combination method is proved. The performance
is validated by extensive simulations which are based
on practical channel models and system parameters.
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