US 6,480,151 B2 · GPS receiver interference nuller with no satellite signal distortion

Abstract

Interference in a GPS receiver in minimized while preserving the GPS satellite signal in a system having N antenna elements for receiving the interference signal and the satellite signal and multiple tapped delay line structures connected to the antenna elements for filtering the signals received by the antenna elements based a plurality of filter coefficients. The filter coefficients are determined such that the plurality of filter coefficients equals R{tilde over (xx)}−1C[CHR{tilde over (xx)}−1C]−1F wherein CH{tilde over (w)}=F, where {tilde over (w)} equals the plurality of filter coefficients, R{tilde over (xx)} equals a covariance matrix, and C and F are determined to preserve a frequency spectrum of the GPS satellite signal.

Claims21

Dependent claims

A method for minimizing an effect of at least one interference signal while minimizing the distortion of at least one GPS satellite signal, the method comprising the steps of:

receiving the at least one interference signal and the at least one GPS satellite signal by a plurality of antenna elements and processing the received signals;
and
filtering the received processed signals by a plurality of multiple tapped delay line structures based a plurality of filter coefficients,
whereby the plurality of filter coefficients equals R{tilde over (xx)}−1C[CHR{tilde over (xx)}−1C]−1F wherein CH{tilde over (w)}=F, where {tilde over (w)} equals the plurality of filter coefficients, R{tilde over (xx)} equals a covariance matrix, and C and F are determined to preserve a frequency spectrum of the at least one GPS satellite signal.

1 more element

An apparatus for minimizing an effect at least one interference signal while minimizing the distortion of at least one GPS satellite signal, the apparatus comprising:

a plurality of antenna elements for receiving the at least one interference signal and the at least one GPS satellite signal;
a plurality of multiple tapped delay line structures operatively connected to the plurality of antenna elements for filtering the signals received by the plurality of antenna elements, respectively, wherein each of the plurality of multiple tapped delay line structures filters the signals based a plurality of filter coefficients;
and
a processor for computing the plurality of filter coefficients for each of the plurality of multiple tapped delay line structure to preserve a frequency spectrum of the at least one GPS satellite signal, wherein the plurality of filter coefficients equals R{tilde over (xx)}−1C[CHR{tilde over (xx)}−1C]−1F wherein CH{tilde over (w)}=F, where {tilde over (w)} equals the plurality of filter coefficients and R{tilde over (xx)} equals a covariance matrix, and C and F are determined to preserve a frequency spectrum of the at least one GPS satellite signal.

1 more element

A computer-readable medium on which is stored a set of instructions for minimizing an effect of at least one interference signal while minimizing the distortion of at least one GPS satellite signal wherein a plurality of antenna elements receive the at least one interference signal and the at least one GPS satellite signal and a plurality of multiple tapped delay line structures operatively connected to the plurality of antenna elements filter the signals received by the plurality of antenna elements, respectively, and each of the plurality of multiple tapped delay line structures filters the signals based a plurality of filter coefficients, which when the set of instructions are executed performs the step comprising:

determining the plurality of filter coefficients such that the plurality of filter coefficients equals R{tilde over (xx)}−1C[CHR{tilde over (xx)}−1C]−1F wherein CH{tilde over (w)}=F, where {tilde over (w)} equals the plurality of filter coefficients, R{tilde over (xx)} equals a covariance matrix, and C and F are determined to preserve a frequency spectrum of the at least one GPS satellite signal.

Dependencies are inferred from the claim text.

GPS receiver interference nuller with no satellite signal distortion

Life of this patent

GPS receiver interference nuller with no satellite signal distortion

Life of this patent

Abstract

Claims21