Search Results for author: Daichi Kitahara

Found 3 papers, 0 papers with code

Convex Estimation of Sparse-Smooth Power Spectral Densities from Mixtures of Realizations with Application to Weather Radar

no code implementations28 Sep 2023 Hiroki Kuroda, Daichi Kitahara, Eiichi Yoshikawa, Hiroshi Kikuchi, Tomoo Ushio

To address this challenge, we design the proposed model that jointly estimates the complex-valued frequency components and the nonnegative PSDs, which are respectively regularized to be sparse and sparse-smooth.

Design of Tight Minimum-Sidelobe Windows by Riemannian Newton's Method

no code implementations2 Nov 2021 Daichi Kitahara, Kohei Yatabe

The short-time Fourier transform (STFT), or the discrete Gabor transform (DGT), has been extensively used in signal analysis and processing.

Frequency-Undersampled Short-Time Fourier Transform

no code implementations28 Oct 2020 Daichi Kitahara

The short-time Fourier transform (STFT) usually computes the same number of frequency components as the frame length while overlapping adjacent time frames by more than half.

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