Patent ID: 7933741
Filing Date: 2011-04-26
Classification: G01R,G01V

Abstract:
1. A method for improving the signal-to-noise ratio of a signal S(t), S(t) containing Signal and noise, the method comprising: (a) transforming measurements of S(t) to frequency domain, and obtaining a measurement of S(t) at a frequency-of-interest; (b) obtaining noise measurements of S(t) at one or more noise frequencies where the Signal portion of S(t) is expected to be small; wherein said one or more noise frequencies are also selected such that they will readily model the noise at the frequency-of-interest or because they are close to the frequency-of-interest, or both; (c) estimating the noise at the frequency-of-interest using the noise measurements at the one or more noise frequencies; and (d) subtracting the estimated noise from the measurement of S(t) at the frequency-of-interest.