Trueposition, Inc.

Rosom Corporation

Harvind Samra

Guttorm Ringstad Opshaug

Matthew Rabinowitz

Scott Furman

David Burgess

James J Spilker, Jr

George Flammer

Dimitri Rubin

Andy Lee

Jim Omura

Methods having corresponding apparatus and computer-readable media comprise: receiving television signals and a message at an apparatus, wherein the television signals include an NTSC television signal and an ATSC television signal, wherein the message represents first and second arrival times representing absolute times of arrival at the apparatus of a first wavefront of the NTSC and ATSC television signals, respectively; measuring third and fourth arrival times, based on a local clock, after receiving the message, wherein the third and fourth arrival times represent times of arrival at the apparatus of a second wavefront of the NTSC and ATSC television signals, respectively; and providing a clock correction signal for the local clock based on the first arrival time, the second arrival time, the third arrival time, and the fourth arrival time.

Positioning and time transfer using television synchronization signals

Apparatus having corresponding methods and computer-readable media comprises a receiver to receive a wireless stereo frequency-modulation (FM) signal comprising a plurality of spectral signal components including a first tone and one or more frequency bands; one or more tone generators each to generate a respective second tone based on a respective one of the frequency bands; a plurality of phase circuits each to measure a phase of a respective one of the first and second tones; and a difference element to determine a phase difference between two of the phases.

Wide-lane pseudorange measurements using FM signals

Growing community of inventors

Fairfield, CA, United States of America

Harvind Samra