Patent ID: 6900381
Filing Date: 2005-05-31
Classification: G10H

Abstract:
1. A method of processing a first discrete time signal, x[n], to generate a second discrete time signal, y[m], wherein the signal x[n] comprises a sequence of values that corresponds to a set of sample points obtained by sampling a continuous time signal x(t) at successive time intervals T s , the method comprising the steps of: storing a windowed function in a look-up table; sampling said windowed function to generate a filter function representing a discrete low pass filter having a length based on a predetermined window length parameter L; and generating a sequence of values, each of the values corresponding to a respective m of the second discrete time signal y[m], wherein each of the generated values is based on a value obtained by computing a convolution sum of values of the first discrete time signal x[n] with said filter function, the convolution sum being computed at one of successively incremented phase increment values multiplied by the sampling interval Ts and corresponding to a respective m value and being centered around a product of the phase increment value and the respective m value.