Methods for Correcting Oscillator Offsets in Ultra-Wideband (UWB) Networks
AssigneeWiser Systems, Inc.
InventorSeth Edward-Austin Hollar
Life of this patent
Estimating the term…
Abstract
Methods for calibrating antenna oscillators are provided including initiating a clock offset process from a primary antenna with a remote antenna within a radio frequency (RF) range of the primary antenna to determine a clock offset between the primary antenna and the remote antenna; calculating a temperature difference between a primary temperature of the primary antenna and a temperature of the remote antenna; and instructing the remote antenna to adjust a clock frequency of the remote antenna based on the determined clock offset and the calculated temperature.
Claims15
A method for calibrating antenna oscillators, the method comprising:
- initiating a clock offset process from a primary antenna having a true clock reference with a remote antenna within a radio frequency (RF) range of the primary antenna to determine a clock offset between the primary antenna and the remote antenna;
- and
- instructing the remote antenna to adjust a clock frequency of the remote antenna based on the determined clock,
- wherein at least one of the initiating, calculating and instructing is implemented by at least one processor.
A method for estimating a clock offset using a temperature difference between devices in a network, the method comprising:
- building a temperature profile for a crystal associated with a device, the temperature profile associating temperature and clock offset;
- storing the temperature profile at the device;
- measuring an actual temperature of the device in the network;
- estimating the clock offset based on the measured actual temperature and the stored temperature profile;
- and
- tuning the crystal associated with the device using the estimated clock offset,
- wherein at least one of the building, storing, measuring, estimating and tuning is implemented by at least one processor.
A method of calibrating a crystal oscillator, the method comprising:
- transmitting first and second messages from a first device in the network to a second device in the network, first and second times of departure for the first and second messages, respectively, being recorded and a time departure difference being communicated to the second device;
- receiving the first and second messages at the second device and recording first and second arrival times, respectively;
- calculating a time difference of arrival based on the recorded first and second arrival times;
- calculating a clock offset based on the time departure difference and the time difference of arrival;
- and
- communicating the calculated clock offset to the first device from the second device.
- wherein at least one of the transmitting, receiving, calculating, calculating and communicating is implemented by at least one processor.
Dependencies are inferred from the claim text.