Patent ID: 6952460
Filing Date: 2005-10-04
Classification: G01S,H04K

Abstract:
1. A method of filtering interference in a Global Positioning System (GPS) receiver, the method comprising: receiving digital input samples from a plurality of antenna elements; computing Fourier Transforms of the digital input samples, wherein the Fourier Transforms of input samples of one antenna element are identifiably maintained from Fourier Transforms of input samples of another antenna element; using Fourier Transform correlation to compute a cross-power spectra for the antenna elements; computing an Inverse Fourier Transform of the cross-power spectra; calculating a covariance matrix from the Inverse Fourier Transform of the cross-power spectra; inverting the covariance matrix; multiplying the inverted covariance matrix with a steering vector to generate weights; and applying the weights to the digital input samples to filter the interference.