2018/03/23 by Grace Cox, S. Egly, Cox, G. A. +9 · 1 citation
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · Computer Science · #Fractal and DNA sequence analysis #Scientific Research and Discoveries #Computational Physics and Python Applications
paper · pdf · doi:10.48550/arxiv.1803.08624
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 F1 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.