Gregory F Richardson

US Patent:

60524219, Apr 18, 2000

Filed:

Sep 28, 1998

Appl. No.:

9/161921

Inventors:

David Livingstone Richardson - Arlington Heights IL
Mark Douglas Hischke - Algonquin IL
Gregory Paul Richardson - Wheaton IL

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H03D 104
G01S 1300
H04M 100
G06F 1500

US Classification:

375346

Abstract:

A method for separating a desired signal from an interfering signal, which is particularly useful when the desired signal is substantially weaker than the interfering signal, includes the steps of providing a combined signal which contains both a desired signal and an interfering signal; performing a Fourier transform upon the combined signal; providing a reference function which is a function of the amplitude, frequency and phase of the interfering signal; performing a Fourier transform upon the referenced function; multiplying the real components of the Fourier transform of the combined signal by the real components of the Fourier transform of the reference signal to form a product; and subtracting the product from the Fourier transform of the combined signal to form transformed data less interference, i. e. , the desired signal.