Residual Fourier-padding interpolation for instrumentation...

Details Residual Fourier-padding interpolation for instrumentation... Residual Fourier-padding interpolation for instrumentation...

2007-12-21

2011-10-25

Ngo, Chuong D (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S313000

Reexamination Certificate

active

08046396

ABSTRACT:
A technique for interpolating a series of samples includes constructing a mathematical model of the series that describes its large signal behavior. The model is subtracted from the original series to yield a residue. A discrete Fourier transform (DFT) is taken of the residue, and the DFT is zero-padded. An inverse DFT of the padded result yields an interpolated residue, which is then added back to the mathematical model to construct an interpolated version of the series of samples. Using this technique, accurate interpolation can generally be attained even when the series of samples is not coherently sampled.

REFERENCES:
patent: 6882947 (2005-04-01), Levin
patent: 7295509 (2007-11-01), Laroia et al.
patent: 2005/0047518 (2005-03-01), Auer
patent: 2008/0198374 (2008-08-01), Desbiens et al.
Richard G. Lyons, “Time-Domain Interpolation by Frequency-Domain ZeroPadding,” 1999, published on line at http://www.dspguru.com/howto/tech/zeropad.htm.

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