Spectral estimation of spectrometers time-sampled signals using fast implementation of the reverse non-uniform discrete fourier transform

US8014965B2 · kind B2 · utility

Assignee

• ABB Bomen · CA

Inventors

• Raphael N. Desbiens · Keyano, CA
• Henry L. Buijs · Quebec City, CA

Key dates

• Filing date: Feb 21, 2007
• Grant date: Sep 6, 2011
• Expiry date: Apr 29, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J3/45
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A spectrometric system has a primary channel with a signal waveform and a reference channel with a signal waveform. A digital representation of the primary signal waveform and a digital representation of the reference signal waveform to provide a digital output representing the primary signal at datum points synchronized with the reference signal are processed by computing the Fourier transform of the primary signal waveform and using a fast reverse non-uniform discrete Fourier Transform technique to compute the reverse non-uniform discrete Fourier transform of the Fourier transform of the primary signal waveform to provide the digital output representing the primary signal at datum points synchronized with the reference signal.