US 12,748,216 B2 · GNSS positioning

Abstract

A method of mitigating multipath interference in a global navigation satellite system (GNSS) includes receiving GNSS signals from a plurality of space vehicles emitting at least L5 and L1/L2 band signals, determining, for each L5 and L1 and/or L2 signal, a pseudo-range based on the signal, and determining a residual for each L5 and L1 and/or L2 signal from each space vehicle, wherein the residual is the difference between the range of the space vehicle to the position predicted based on data from a previous time period and the pseudo-range. The method further includes determining a statistic based a comparison between residuals of the L1 and/or L2 signals and the residuals of the L5 signals. If the statistic is above a predetermined threshold, the overall position is determined based on a subset of the signals, the subset comprising the L5 signals and wherein at least one of the L1 and/or L2 signals are excluded from the subset. If the statistic is not above a predetermined threshold, the position is determined based on the L1 and/or L2 signals and the L5 signals.

Claims20

Dependent claims

A method of mitigating multipath interference in a global navigation satellite system (GNSS) receiver, the method comprising:

receiving GNSS signals from a plurality of space vehicles which emit at least an L5 signal and an L1 and/or L2 band signal;
determining, for each L5 signal and L1 and/or L2 signal, a pseudo-range based on the signal;
determining a residual for each L5 signal and L1 and/or L2 signal from each space vehicle, wherein the residual is the difference between the pseudo-range and a range from a predicted position of the receiver to the space vehicle based on data from a previous time period;
determining a statistic based on a comparison between residuals of the L1 and/or L2 signals and the residuals of the L5 signals;
determining a position of the receiver based on a subset of the signals when the statistic is above a predetermined threshold or determining an overall position based on at least the L1 and/or L2 signals and the L5 signals when the statistic is not above a predetermined threshold, the subset comprising the L5 signals and wherein at least one of the L1 and/or L2 signals are excluded from the subset.

2 more elements

A global navigation satellite system (GNSS) receiver comprising:

a signal processing unit configured to track GNSS signals and produce GNSS measurements from the GNSS signals;
and
at least one processor, configured to:
determine, for each L5 signal and L1 and/or L2 signal, a pseudo-range based on the signal;
determine a residual for each L5 signal and L1 and/or L2 signal from each space vehicle, wherein the residual is the difference between the pseudo-range and a range from a predicted position of the receiver to the space vehicle based on data from a previous time period;
determine a statistic based a comparison between residuals of the L1 and/or L2 signals and the residuals of the L5 signals;
determine an overall position based on the L1 and/or L2 signals and the L5 signals under a condition in which the statistic is below a predetermined threshold and determine a position of the receiver based on a subset of the signals under the condition in which the statistic is not below a predetermined threshold, the subset comprising the L5 signals and wherein at least one of the L1 and/or L2 signals are excluded from the subset.

4 more elements

Dependencies are inferred from the claim text.

GNSS positioning

Life of this patent

GNSS positioning

Life of this patent

Abstract

Claims20