Satellite and local system position determination
First Claim
1. A system for determining a position from transmitted signals, the system comprising:
- a digital de-correlator operable to de-correlate first signals from at least one satellite;
an analog de-correlator operable to de-correlate second signals from at least one land based transmitter; and
a processor operable to determine the position as a function of the outputs of the digital and analog decorrelators.
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Accused Products
Abstract
In a local positioning system, augmentation of the land-based system is provided by receiving signals from a GNSS. The signals from the land-based positioning system have a code phase accuracy better than one wavelength of a carrier of the signals from the GNSS. Different decorrelation may be used for signals from a satellite than from a land-based transmitter, such as using a digital decorrelator for signals from the satellite and an analog decorrelator for signals from a land-based transmitter. The receivers may include both a GNSS antenna and a local antenna. The phase centers of the two antennas are within one wavelength of the GNSS signals from each other. The local antenna is sized for operation in the X or ISM-bands of frequencies. The GNSS antenna is a patch antenna where the microwave antenna extends away from the patch antenna in at least one dimension.
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Citations
16 Claims
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1. A system for determining a position from transmitted signals, the system comprising:
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a digital de-correlator operable to de-correlate first signals from at least one satellite;
an analog de-correlator operable to de-correlate second signals from at least one land based transmitter; and
a processor operable to determine the position as a function of the outputs of the digital and analog decorrelators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining a position from transmitted signals, the method comprising:
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(a) digital de-correlating first signals from at least one satellite;
(b) analog de-correlating second signals from at least one land based transmitter; and
(c) determining the position as a function of the de-correlated first and second signals. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification