Patent ID: 8296106

Claim:
An apparatus comprising: a processor configured to receive a sample signal scan that includes a plurality of electromagnetic signal measurements at a discrete set of frequencies, each respective measurement having been taken by a spectrometer system passing an electromagnetic signal through a sample cell including a sample medium and a base medium, wherein the processor is configured to segment the sample signal scan into a plurality of frequency segments, wherein the processor is configured to process the sample signal scan segments to produce a respective plurality of corrected sample signal scan segments, wherein the processor being configured to process the sample signal scan segments includes, for each sample signal scan segment, being configured to: apply an inner-product operation on the sample signal scan segment and a respective set of eigenvectors from a plurality of sets of eigenvectors to generate a respective set of corresponding coefficients, the sets of eigenvectors having been generated by segmenting a plurality of background reference signal scans into a plurality of sets of background reference signal scan segments, and decomposing each set of background reference signal scan segments according to a singular value decomposition technique, each background reference signal scan including a plurality of electromagnetic signal measurements at a discrete set of frequencies, each respective measurement having been taken by the spectrometer system passing an electromagnetic signal through the sample cell including the base medium but without the sample medium, and subtract the sample signal scan segment from a linear combination of the respective set of eigenvectors and corresponding coefficients to thereby produce a respective corrected sample signal scan, and wherein the processor is configured to assemble the corrected sample signal scan segments.