Method and Apparatus for Processing a Physiological Signal

Method and Apparatus for Processing a Physiological Signal

US Patent No.  6,339,715 B1  January 15, 2002

US Patent No. 6,647,280 B2  November 11, 2003

A signal processing method, preferably for extracting a fundamental period from a noisy, low-frequency signal, is disclosed. The signal processing method generally comp rises 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.

 

 

 

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