DATA PROCESSING METHOD AND DEVICE

WIPO Patent Application WO/2012/039061

A1

In the present invention, for an input signal with overlapping ringing, a ringing generation filter (12) generates a ringing approximation waveform from only the peak signal portion preceding ringing so as to decrease the ringing approximation waveform from the input signal at a subtractor (11), thereby removing the ringing. The coefficient of the filter (12) is obtained by applying an algorithm similar to polynomial division in the full-pivoting Gaussian elimination method to a polynomial using reference data which represents the peak waveform and the ringing waveform, and by using the least-squares method to minimize the squared covariance so as to tolerate the existence of noise in the data. In addition, by repeated processing for multiple instances of the same dataset, calculation precision of the coefficient is increased even under conditions in which the frequency of the ringing is high and the number of samples for one period is low. Accordingly, it is possible to accurately remove ringing for even a high-frequency signal.

NODA AKIRA (JP)

PCT/JP2010/066581

March 29, 2012

September 24, 2010

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SHIMADZU CORP (JP)
NODA AKIRA (JP)

H03H17/02

JP2010518362A	2010-05-27
JPH03163905A	1991-07-15
JP2008249694A	2008-10-16
JP2006340005A	2006-12-14
JP2008249694A	2008-10-16
JP2006340005A	2006-12-14

"Kinji Daisuu, Sono Ichi - Kinji Takoushiki No Shisoku Enzan (Approximate Algebra, Part I - Four Arithmetic Operations of Approximate Polynomial", RIMS KOKYUROKU, vol. 920, 1995, pages 115 - 119
See also references of EP 2621089A4

Kyoto International Patent Law Office (JP)
Patent business corporation Kyoto international patent firm (JP)

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