Method and system of timing and localizing a radio signal
AssigneeSemtech Corporation
InventorOlivier Bernard André SELLER
Life of this patent
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Abstract
Method of timing, in a receiver, a radio signal generated in and transmitted from a transmitter, the radio signal comprising a series of frequency chirps, the system including: receiving the radio signal from the transmitter; synthesizing projection vectors comprising a series of frequency chirps that are a complex-conjugate image of those comprised in the radio signal the projection vectors being time-shifted relative to one another by determined shift intervals of time; multiplying the received radio signal by the projection vectors and accumulating the results; interpolating the accumulating results to determine a peak time shift.
Claims11
Method of timing, in a receiver, a radio signal generated in and transmitted from a transmitter, the radio signal comprising a series of frequency chirps, the system including:
- receiving the radio signal from the transmitter;
- synthesizing projection vectors comprising a series of frequency chirps that are a complex-conjugate image of those comprised in the radio signal the projection vectors being time-shifted relative to one another by determined shift intervals of time;
- multiplying the received radio signal by the projection vectors and accumulating the results;
- interpolating the accumulating results to determine a peak time shift.
A method of positioning a radio source, wherein the radio source emits a radio signal comprising a series of frequency chirps whose parameters of frequency slope and phase are determined, including:
- receiving the radio signal in a plurality of spaced receivers, wherein the receivers have access to a common time reference or to a plurality of synchronised time references,
- determining times of arrival of the radio signal in the receivers by the method of any one of the preceding claims,
- positioning the radio source based on the times of arrival.
Dependencies are inferred from the claim text.