GNSS reception using distributed time synchronization
First Claim
1. A method of locating a position, the method comprising:
- receiving, from a wired network, by a customer premises unit a clock signal that is substantially synchronous with a GNSS clock;
transmitting the received clock signal wirelessly by the customer premises unit;
receiving the transmitted clock signal using a first wireless device;
transmitting a first frame from the first wireless device substantially synchronously with the clock signal received by the first wireless device;
receiving the transmitted first frame at a second wireless device; and
attempting to identify a position of the second wireless device using information received from the first frame and information representative of a distance between the second wireless device and a third wireless device.
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Accused Products
Abstract
A GNSS receiver communicates with any connectivity device, such as a WiFi device that is, in turn, in communication with a wired network having access to the DTI timing. Such connectivity devices may set their timing and frame synchronization to the DTI and thus serve as Geoposition beacons, thereby enabling the GNSS receiver to accurately determine its position. The GNSS receiver may also use the DTI timing supplied by such a network to perform relatively long integration time so as to achieve substantially improved sensitivity that is necessary for indoor Geopositioning applications. Furthermore, the GNSS data, such as satellite orbital information, may also be propagated by such devices at high speed. By providing this data to the GNSS receivers via such connectivity devices in a rapid fashion, the GNSS receivers are enabled to receive the transmitted data associated with the satellite without waiting for the GNSS transmission from the satellites.
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Citations
20 Claims
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1. A method of locating a position, the method comprising:
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receiving, from a wired network, by a customer premises unit a clock signal that is substantially synchronous with a GNSS clock; transmitting the received clock signal wirelessly by the customer premises unit; receiving the transmitted clock signal using a first wireless device; transmitting a first frame from the first wireless device substantially synchronously with the clock signal received by the first wireless device; receiving the transmitted first frame at a second wireless device; and attempting to identify a position of the second wireless device using information received from the first frame and information representative of a distance between the second wireless device and a third wireless device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of locating a position of a wireless receiver, the method comprising:
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receiving, from a wired network, by a customer premises unit timing information that is substantially synchronous with a GNSS clock; transmitting the timing information wirelessly by the customer premises unit to the wireless receiver; and locating the position of the wireless receiver using the transmitted timing information. - View Dependent Claims (13, 14)
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15. A communication system comprising:
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a customer premises unit comprising; a modem configured to receive a reference signal from a wired network, the reference signal being substantially synchronous with a GNSS time; a first wireless transceiver coupled to the modem and configured to transmit a frame including timing information associated with the reference signal; and a second wireless transceiver configured to receive the frame and determine a position in response to the received frame. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification