Patent ID: 6219376
Filing Date: 2001-04-17
Classification: G01S,H04B

Abstract:
A method of suppressing an interference signal from an input signal which includes a useful signal and the interference signal, the interference signal having a bandwidth more narrow than the bandwidth of the useful signal and having a mean frequency value .omega..sub.INT,T, said method comprising the steps of:(a) generating a first signal as a function of the input signal;(b) generating a first quadrature component and a second quadrature component of said first signal with respect to a first periodic reference signal, said quadrature components being orthogonal to one another, each said quadrature component having a frequency spectrum;(c) filtering each of said first and second quadrature components in time using at least one accumulator to attenuate a portion of said component's frequency spectrum which is outside a selected frequency band, said selected frequency band including a portion of the interference signal spectrum corresponding to the mean frequency value of the interference signal, said filtering step generating a first filtered component and a second filtered component; and(d) generating a difference signal which is related to the difference between said input signal and said filtered components.