Multipath identification by comparing two different GNSS signals
AssigneeContinental Teves AG & Co. oHG
InventorMichael Zalewski
Life of this patent
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Abstract
A method for detecting a multipath effect in a GNSS receiver which is designed to receive different signals from a GNSS satellite and includes a parameter which is determined from directly received signals and has a substantially constant target value, including the steps receiving at least two mutually independent signals; determining a current parameter value from at least the first and the second signal; evaluating the parameter value in relation to the target value, and detecting a multipath effect when the parameter value has a deviation (ΔK) which deviates from the already known target value.
Claims14
A method for detecting a multipath effect in a GNSS receiver which is designed to receive different signals from a GNSS satellite, comprising:
- receiving at least two mutually independent signals, the signals including a first signal having a first frequency and a second signal having a second frequency different than the first frequency,
- determining a phase shift between at least the first signal and the second signal,
- evaluating the phase shift in relation to a target phase shift determined from an expected phase shift between the first signal and the second signal when directly received by the GNSS receiver, and
- detecting a multipath effect when the evaluation indicates that the phase shift:
- is less than a lower phase shift threshold that is less than the target phase shift, or
- is greater than an upper phase shift threshold that is greater than the target phase shift.
Dependencies are inferred from the claim text.