Channel and hardware impairment data augmentation for robust modulation
classification
Abstract
Deep learning has achieved remarkable results in modulation
classification under two assumptions: a large amount of labeled
class-balanced data is available, and test data shares the same
distribution as data used for training. However, due to dynamic wireless
fading channels and hardware imperfections, it is implausible that these
assumptions hold in practice. This paper proposes Model-based Data
Augmentation for Deep learning-based Modulation Classification (MDA-DMC)
to build a high-quality dataset from a small amount of labeled seed
data.
We develop two novel augmentation methods to combat channel and hardware
impairments, along with two widely
used augmentation methods, adding Gaussian noise and rotation. We are
the first to investigate the relationship
between augmentation methods and impairments due to channel and hardware
imperfections. We show that MDA-
DMC can successfully combat the hardware imperfections for the same
channel model as the channel model of
seed data. Furthermore, with a few AWGN seed data, MDA-DMC achieves an
accuracy gain of up to 17.20% in fading channels. By adding a few
fading seed data, MDA-DMC improves accuracy by an additional 10.78% in
fading channels.