Denoising gravitational wave with deep learning in the time-frequency domain

TL;DR

This paper introduces a deep learning approach using the Griffin-Lim algorithm to denoise gravitational wave signals in the time-frequency domain, improving phase and amplitude recovery for binary black hole mergers.

Contribution

It presents a novel deep learning model that leverages the Griffin-Lim algorithm for phase reconstruction in gravitational wave denoising, focusing on time-frequency data processing.

Findings

Effective denoising of simulated waveforms with good amplitude and phase alignment.

High accuracy in real detected events, especially near the merger stage.

Demonstrates potential for improved gravitational wave data analysis methods.

Abstract

Gravitational wave denoising is an ongoing task for revealing the events of compact binary objects in the universe. Recently, with the aid of deep learning, gravitational waves have been efficiently and delicately extracted from the noisy data compared with the traditional match-filtering. While most of the relevant studies adopt the data in the time series only, the time-frequency data processing is also in progress due to its several advantages for the waveform denoising. Here, we target the gravitational waves events emitted by binary black hole (BBH) mergers, with their total mass larger than 30 solar masses. For denoising, we propose a deep learning model utilizing the Griffin-Lim algorithm, an existing numerical approach to restore the phase information from the related amplitude spectrogram. This design allows extra attention on the phase recovery by using a priorly denoised amplitude spectrogram. The denoising results fit well in both the amplitude and the phase alignments of the mock injected waveforms. We also apply our model to the real detected events and discover a nice consistency with the simulated template waveforms, especially the high accuracy around the merger stage. Our work suggests the possibility of a better methodological design for gravitational wave data analysis.