Localized interference nulling preprocessor

Details Localized interference nulling preprocessor Localized interference nulling preprocessor

1997-09-12

1998-11-24

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

Digital processing

342373, 36472602, G01S 7292

Patent

active

058413952

ABSTRACT:
A localized interference nulling preprocessor for a Fast Fourier Transform (FFT) or a Butler matrix system includes a means for forming a dot product of a signal vector and each of the preprocessed eigen vectors of the virtual interference covariance matrix of a predetermined localized interference, means for scaling the conjugate of the principal eigen vectors by the dot product, and means for subtracting from the signal vector the product of each dot product and conjugate of principal eigen vectors to generate a preprocess signal vector modified to produce a localized nulling of predetermined localized interference by a Fast Fourier Transform (FFT) or Butler matrix system.

REFERENCES:
patent: 4513383 (1985-04-01), Hackett, Jr.
patent: 4931977 (1990-06-01), Klemes
patent: 5299148 (1994-03-01), Gardner et al.
patent: 5610612 (1997-03-01), Piper

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