Method and apparatus for distinguishing direct GNSS signals from reflections

摘要

A global navigation satellite system (GNSS) enabled device that is configured to distinguish reflected GNSS signals from direct GNSS signals utilizing three-dimensional models of the terrain in the proximity of the GNSS enabled device. By utilizing the identification of reflected GNSS signals, the reflected GNSS signals can be excluded and/or weighted to achieve a more accurate location determination.

主权项

1. A global navigation satellite systems (GNSS) enabled device, comprising:
a GNSS receiver configured to receive GNSS signals from a plurality of satellites, the received GNSS signals including reflected GNSS signals and direct GNSS signals; and a processor configured to:
differentiate between the reflected GNSS signals and the direct GNSS signals; andgenerate a navigation solution for the GNSS enabled device based on both the reflected GNSS signals and the direct GNSS signals, wherein the reflected GNSS signals are weighted differently from the direct GNSS signals in their respective contribution to the generation of the navigation solution,wherein for each reflected GNSS signals, the respective weighting is continuously increased as a velocity of the GNSS enabled device becomes more orthogonal compared to a vector determined from the GNSS enabled device toward a corresponding satellite of the plurality of satellites that originated the reflected GNSS signal.