Patent Document ID: 10090872
Application ID: 14894852
Patent Flag: 1

Claim One:
1. A digital signal processing method for estimating a frequency domain representation of a signal, the method comprising: obtaining, by a processor, signal sample data comprising a series of samples, wherein the samples comprise samples of a physical signal collected by a signal measurement instrument and the series of samples is distorted by an instrument function associated with the collection of the physical signal by the signal measurement instrument; obtaining, by the processor, coefficient data comprising a set of coefficients that fit a set of basis functions to a complex exponential function wherein the set of basis functions comprises a plurality of basis functions each defined by a shifted version of the instrument function in a signal domain; calculating, by the processor, estimates of the frequency domain representation of the signal by scaling each item of signal sample data by a corresponding item of the coefficient data and summing the scaled sample data to convert the samples of the signal into an estimate of the frequency domain representation of the signal; wherein the estimate of the instrument function is based on a characterisation of the instrument function in the frequency domain at frequencies associated with the complex exponential function.