MULTIPATH MITIGATION FOR GNSS LOCATION DETERMINATION USING DUAL ANTENNAS
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United States of America Patent
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Issued Date -
Jul 4, 2024
app pub date -
Dec 30, 2022
filing date -
Dec 30, 2022
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Abstract
A device for determining coordinates of a location can include two GNSS receiver antennas positioned in fixed relation to each other and separated by a short baseline. Signals received from the two receiver antennas can be processed to estimate a degree to a multipath effect may be impairing reliability of observables extracted from the received signals. Where both antennas observe signals at the same carrier frequency from the same satellite, each antenna can determine a carrier phase, and a single-difference carrier phase (SDCP) can be computed and used to estimate multipath effects. Where both antennas observe signals at two (or more) carrier frequencies from the same satellite, a “geometry-free” SDCP can be computed and used to estimate multipath effects. Observations of different satellites can be weighted based on the estimated multipath effects.
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