System and method of collaborative positioning calibration, and method of deploying reference station
First Claim
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1. A collaborative positioning calibration method, the method comprising the steps of:
- receiving a satellite signal of at least one satellite and a known position of each of a plurality of reference stations;
computing a plurality of pseudo-range differences, each of which is computed based on the known position and a computed position of each of the reference stations computed according to the satellite signal;
broadcasting an area calibration data to at least one client;
computing a calibrated pseudo-range between each of the client and the satellite according to a pseudo-range correction value of the client, wherein the pseudo-range correction value is a linear combination of a plurality of weights and the pseudo-range differences, and each of the weights is negatively related to a difference between a signal-to-noise ratio (SNR) value of each of the reference stations and a SNR of the client; and
outputting a calibrated position.
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Abstract
An embodiment disclosed a system for collaborative positioning calibration, comprising at least one reference station and at least one client. The reference station uses a known position and a satellite signal transmitted by at least one satellite to compute a pseudo-range difference of the reference station position and the satellite position, and then broadcasts an area calibration data including at least one pseudo-range difference to at least one client. Based on the area calibration data, the client computes at least one pseudo-range calibration data and outputs a calibrated position of global positioning system.
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Citations
14 Claims
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1. A collaborative positioning calibration method, the method comprising the steps of:
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receiving a satellite signal of at least one satellite and a known position of each of a plurality of reference stations; computing a plurality of pseudo-range differences, each of which is computed based on the known position and a computed position of each of the reference stations computed according to the satellite signal; broadcasting an area calibration data to at least one client; computing a calibrated pseudo-range between each of the client and the satellite according to a pseudo-range correction value of the client, wherein the pseudo-range correction value is a linear combination of a plurality of weights and the pseudo-range differences, and each of the weights is negatively related to a difference between a signal-to-noise ratio (SNR) value of each of the reference stations and a SNR of the client; and outputting a calibrated position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A client device, comprising:
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a global positioning system (GPS) module configured to receive a satellite signal of at least one satellite; a communication module configured to receive a plurality of pseudo-range differences from a plurality of reference stations and an area calibration data, wherein each of the pseudo-range differences is computed based on a known position of each of the reference stations and a computed position of each of the reference stations computed according to said satellite signal; and a computation module configured to compute a calibrated pseudo-range between each of the client device and the satellite according to a pseudo-range correction value of the client device, wherein the pseudo-range correction value is a linear combination of a plurality of weights and the pseudo-range differences, and each of the weights is negatively related to a difference between a signal-to-noise ratio (SNR) value of each of the reference stations and a SNR of the client device. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification