Inter-channel bias calibration for navigation satellite systems
AssigneeJavad GNSS, Inc.
InventorsSergey YUDANOV, Vyacheslav VARYUKHIN, Nikolay SHURYGIN, Stanislav SILA-NOVITSKIY, Javad ASHJAEE
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Abstract
Dynamic inter-channel bias calibration of a navigational receiver is provided. A reference signal is propagated through front end circuitry of the receiver. A delay caused by the propagation of the reference signal through the front end circuitry is measured. The inter-channel bias of the navigational receiver is reduced using the measured delay associated with the front end circuitry of the receiver.
Claims18
Apparatus for calibrating an inter-channel bias of a navigation receiver, comprising:
- reference signal circuitry for generating a reference signal;
- measuring logic for measuring a bias delay associated with front-end circuitry of the navigation receiver by comparing a delayed reference signal with the reference signal, wherein the delayed reference signal is based upon propagation of the reference signal through the front-end circuitry, the front end circuitry for processing the reference signal and a received satellite signal;
- and
- calibration logic for generating a correction signal to reduce inter-channel bias.
A method for calibrating an inter-channel bias of a navigation receiver, comprising:
- generating a reference signal;
- measuring a bias delay associated with front-end circuitry of the navigation receiver by comparing a delayed reference signal with the reference signal, wherein the delayed reference signal is based upon propagation of the reference signal through the front-end circuitry of the navigation receiver, the front end circuitry for processing the reference signal and a received satellite signal;
- and
- generating a correction signal to reduce inter-channel bias.
A computer readable storage medium comprising program code for calibrating an inter-channel bias of a navigation receiver, the program code for:
- generating a reference signal;
- measuring a bias delay associated with front-end circuitry of the navigation receiver by comparing a delayed reference signal with the reference signal, wherein the delayed reference signal is based upon propagation of the reference signal through the front-end circuitry of the navigation receiver, the front end circuitry for processing the reference signal and a received satellite signal;
- and
- generating a correction signal to reduce inter-channel bias.
Dependencies are inferred from the claim text.