An Improved Method for Instantaneous Frequency Estimation Using a Finite Order Hilbert Transformer. - Keisuke Takao; Takahiro Natori; Toma Miyata; Naoyuki Aikawa (APSIPA, 2020)

Accuracy Improvement of Instantaneous Frequency Estimation by Finite Order FIR Hilbert Transformer Using Notch Filter. - Keisuke Takao; Takahiro Natori; Toma Miyata; Naoyuki Aikawa (MOCAST, 2020)

Design of filters with variable transmission zeros for highly accurate instantaneous frequency estimation. - Keisuke Takao; Takahiro Natori; Naoyuki Aikawa (MWSCAS, 2021)

A Highly Accurate Instantaneous Frequency Estimation Method Taking into Account the Aliasing of Oscillation Components. - Keisuke Takao; Takahiro Natori; Naoyuki Aikawa (ICEIC, 2022)