Patent ID: 6766339
Filing Date: 2004-07-20
Classification: G03F,H03H

Abstract:
A method of reducing the number of operations required to interpolate a discrete rectangular input signal having a first sampling rate into a discrete output signal having a second sampling rate, the method comprising the steps of:(a) selecting a plurality of input signal values from the input signal, wherein each selected input signal value corresponds to a particular time increment at the first sampling rate; and (b) generating, at a time increment occurring at the second sampling rate, an output signal value, said step comprising (i) calculating a result according to &Sum;k=1L&it;ak&af;[F&it;(t-Tk)-F&it;(t-Tk+1)],â€ƒwherein ak is one of the selected plurality of input signal values, F(tâˆ’Tk) is a first of the plurality of filter response function values, and F(tâˆ’Tk+1) is a second of the plurality of filter response function values; and (ii) summing the result with a prior time increment output signal value.