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Filters: Author is Beling, Peter A.  [Clear All Filters]
2022-07-01
Cody, Tyler, Beling, Peter A..  2021.  Heterogeneous Transfer in Deep Learning for Spectrogram Classification in Cognitive Communications. 2021 IEEE Cognitive Communications for Aerospace Applications Workshop (CCAAW). :1—5.
Machine learning offers performance improvements and novel functionality, but its life cycle performance is understudied. In areas like cognitive communications, where systems are long-lived, life cycle trade-offs are key to system design. Herein, we consider the use of deep learning to classify spectrograms. We vary the label-space over which the network makes classifications, as may emerge with changes in use over a system’s life cycle, and compare heterogeneous transfer learning performance across label-spaces between model architectures. Our results offer an empirical example of life cycle challenges to using machine learning for cognitive communications. They evidence important trade-offs among performance, training time, and sensitivity to the order in which the label-space is changed. And they show that fine-tuning can be used in the heterogeneous transfer of spectrogram classifiers.