Patent ID: 8442608

Claim:
A method for non-invasively estimating a physiological parameter comprising: detecting light over a period of time from a plurality of light sources comprising at least three light sources; generating respective distributions for the detected light of each of the plurality of light sources for the period of time; deconvolving the distribution for the detected light of one of the plurality of light sources from each of the other distributions for the detected light from the other plurality of light sources to produce clean distributions for the period of time; and estimating a physiological parameter based at least in part upon the clean distributions; wherein deconvolving the distribution for the detected light of one of the plurality of light sources comprises using a least squares algorithm, wherein the least squares algorithm comprises: formulating a toeplitz matrix A associated with f; and finding a vector g with nonnegative elements such that (Ag-f) T (Ag-f) is minimized, wherein g and f are bi-infinite sequences.