Classification of simulated radio signals using Wide Residual Networks for use in the search for extra-terrestrial intelligence
This work addresses the challenge of signal classification for SETI researchers, but it is incremental as it applies an existing neural network method to simulated data in this domain.
The paper tackled the problem of detecting and classifying artificial radio signals in SETI research by training a Wide Residual Network on simulated spectrograms, achieving an average F1 score of 95.11% on unseen simulated data.
We describe a new approach and algorithm for the detection of artificial signals and their classification in the search for extraterrestrial intelligence (SETI). The characteristics of radio signals observed during SETI research are often most apparent when those signals are represented as spectrograms. Additionally, many observed signals tend to share the same characteristics, allowing for sorting of the signals into different classes. For this work, complex-valued time-series data were simulated to produce a corpus of 140,000 signals from seven different signal classes. A wide residual neural network was then trained to classify these signal types using the gray-scale 2D spectrogram representation of those signals. An average $F_1$ score of 95.11\% was attained when tested on previously unobserved simulated signals. We also report on the performance of the model across a range of signal amplitudes.