Non-uniform non-harmonic analysis method development and verification of applicability to swept source optical coherence tomography

Tetsuya Uchida; Shigeki Hirobayashi; Tadanobu Misawa; Toshio Yoshizawa; Xu Cao; Changho Chong; Atsushi Morosawa; Koki Totsuka; Takuya Suzuki

doi:10.1587/nolta.4.172

Special issue on Advances and Applications in Nonlinear Time Series Methods

Non-uniform non-harmonic analysis method development and verification of applicability to swept source optical coherence tomography

Tetsuya Uchida, Shigeki Hirobayashi, Tadanobu Misawa, Toshio Yoshizawa, Xu Cao, Changho Chong, Atsushi Morosawa, Koki Totsuka, Takuya Suzuki

著者情報

キーワード: optical coherence tomography, swept-sorce OCT, signal processing, non-harmonic analysis

ジャーナルフリー

2013 年 4 巻 2 号 p. 172-182

DOI https://doi.org/10.1587/nolta.4.172

詳細

抄録

We generally analyze data measured at equal time intervals using fast Fourier transforms (FFTs). However, when for some reason we can only obtain unequally spaced measurement points, then the data become non-uniform and cannot be analyzed directly using FFTs. In this paper, the non-uniform trapezoidal integral discrete Fourier transform (TINUDFT) is proposed to replace the FFT, and is implemented in non-harmonic analysis (NHA) to develop non-uniform NHA (NUNHA) for non-uniform data. NUNHA improved the SNR by over 70 dB compared with the simple non-uniform sinusoidal signal frequency. NUNHA's effectiveness for swept source optical coherence tomography (SS-OCT) is shown by simulation.

責任著者(Corresponding author)

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