Systems and methods for acquisition and tracking of low CNR GPS signals
First Claim
1. A receiver for tracking of low carrier-to-noise ratio (“
- CNR”
) signals from a plurality of radio navigation satellites while the receiver is moving, comprising;
(a) a radio frequency (RF) front-end that provides satellite data corresponding to signals received from the plurality of radio navigation satellites; and
(b) an inertial measurement unit (MU) that provides inertial data; and
(c) a processor circuit in circuit communication with the RF front end and the IMU, the processor circuit being capable of using satellite data from the RF front-end and inertial data from the IMU to perform continuous carrier phase tracking of low CNR radio navigation satellite signals having a CNR at a 20 dB-Hz level, while the receiver is moving.
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Accused Products
Abstract
A receiver for continuous carrier phase tracking of low carrier-to-noise ratio (“CNR”) signals from a plurality of radio navigation satellites while the receiver is mobile. The receiver may have: a radio frequency (RF) front-end that provides satellite data corresponding to signals received from the plurality of radio navigation satellites; an inertial measurement unit (IMU) that provides inertial data; and a processor circuit in circuit communication with the RF front end and the IMU, the processor circuit being capable of using satellite data from the RF front-end and inertial data from the IMU to perform continuous carrier phase tracking of low CNR radio navigation satellite signals having a CNR of about 20 dB-Hz, while the receiver is mobile. The receiver may be a GPS receiver for continuous carrier phase tracking of low-CNR GPS signals.
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Citations
45 Claims
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1. A receiver for tracking of low carrier-to-noise ratio (“
- CNR”
) signals from a plurality of radio navigation satellites while the receiver is moving, comprising;(a) a radio frequency (RF) front-end that provides satellite data corresponding to signals received from the plurality of radio navigation satellites; and (b) an inertial measurement unit (MU) that provides inertial data; and (c) a processor circuit in circuit communication with the RF front end and the IMU, the processor circuit being capable of using satellite data from the RF front-end and inertial data from the IMU to perform continuous carrier phase tracking of low CNR radio navigation satellite signals having a CNR at a 20 dB-Hz level, while the receiver is moving. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
- CNR”
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39. A method of tracking of low carrier-to-noise ratio (“
- CNR”
) signals from a plurality of radio navigation satellites while the receiver is moving, comprising the steps of;receiving signals from the plurality of radio navigation satellites; providing satellite data corresponding to the signals received from the plurality of radio navigation satellites; providing inertial data from an inertial measurement unit (IMU); and using the satellite data and the inertial data to perform continuous carrier phase tracking of low CNR radio navigation satellite signals having a CNR at a 20 dB-Hz level, while the receiver is moving.
- CNR”
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40. A receiver for tracking of low carrier-to-noise ratio (“
- CNR”
) signals from a plurality of radio navigation satellites while the receiver is stationary (dynamic motion of less than 2 cm/s), comprising;(a) a radio frequency (RF) front-end that provides satellite data corresponding to signals received from the plurality of radio navigation satellites; and (b) a processor circuit in circuit communication with the RF front end, the processor circuit being capable of using satellite data from the RF front-end to perform continuous carrier phase tracking of low CNR radio navigation satellite signals having a CNR at a 20 dB-Hz level, while the receiver is stationary. - View Dependent Claims (41, 42, 43, 44, 45)
- CNR”
Specification