06339715 is referenced by 148 patents.

A signal processing method, preferably for extracting a fundamental period from a noisy, low-frequency signal, is disclosed. The signal processing method generally comprises calculating a numerical transform for a number of selected periods by multiplying signal data by discrete points of a sine and a cosine wave of varying period and summing the results. The period of the sine and cosine waves are preferably selected to have a period substantially equivalent to the period of interest when performing the transform.

Title
Method and apparatus for processing a physiological signal
Application Number
9/410887
Publication Number
6339715 (B1)
Application Date
September 30, 1999
Publication Date
January 15, 2002
Inventor
James L Reuss
Waukesha
WI, US
Dennis E Bahr
Madison
WI, US
Agent
Reinhart Boerner Van Deuren S C
US
Assignee
OB Scientific
WI, US
IPC
A61B 5/00
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