Positioning Method, Positioning Chip, and Terminal Device
AssigneeHuawei Technologies Co., Ltd.
InventorsKang Wang, Wei Huang, Guangli Dong
Life of this patent
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Abstract
A positioning method is applied to a terminal device that includes a positioning chip and a system on chip (SoC). The method includes receiving, by the positioning chip, a satellite signal transmitted by at least one satellite, obtaining, by the positioning chip using the SoC, a differential correction value sent by a reference station, and performing, by the positioning chip based on a carrier phase differential technology, positioning calculation using the satellite signal and the differential correction value.
Claims20
A method implemented by a positioning chip of a terminal device, wherein the method comprises:
- receiving a satellite signal;
- obtaining from a reference station, a differential correction value;
- and
- performing, based on a carrier phase differential technology, the satellite signal, and the differential correction value, a positioning calculation.
A positioning chip comprising:
- a transceiver circuit configured to receive a satellite signal;
- and
- a processing circuit coupled to the transceiver circuit and configured to:
- obtain from a reference station, a differential correction value;
- and
- perform, based on a carrier phase differential technology, positioning calculation using the satellite signal and the differential correction value.
A tracking loop comprising:
- a loop filter;
- a voltage-controlled oscillator;
- a four-quadrant phase detector sequentially coupled to the loop filter and the voltage-controlled oscillator;
- a first switch comprising:
- a first end;
- and
- a second end coupled to the four-quadrant phase detector;
- and
- a control circuit coupled to the first end and configured to control the first switch to be closed to track a satellite signal using a first tracking loop comprising the four-quadrant phase detector, the loop filter, and the voltage-controlled oscillator when the satellite signal comprises a navigation message assisting in tracking the satellite signal.
Dependencies are inferred from the claim text.