Patent ID: 7649925

Claim:
A method utilizing a first transceiver and a second transceiver for transferring timing between a first time clock and a second time clock comprising: transmitting a first ultra wideband signal by said first transceiver, said ultra wideband signal having a signal structure comprising a time reference point and conveying digital time information for said time reference point, said time reference point and said digital time information established in accordance with said first time clock; receiving the first ultra wideband signal by said second transceiver; synchronizing a receiver time base of said second transceiver with the received first ultra wideband signal; generating a first detected signal versus delay time multipath pattern of said first ultra wideband signal as received at said second transceiver; transmitting a return ultra wideband signal by said second transceiver, said return ultra wideband signal having predetermined timing relationship to the receiver time base of said second transceiver; generating a second detected signal versus delay time multipath pattern of said return ultra wideband signal as received at said first transceiver; determining a round trip propagation delay from said first transceiver to said second transceiver and back to said first transceiver in part by comparing said first detected signal versus delay time multipath pattern to said second detected signal versus delay time multipath pattern; determining a propagation delay from said first transceiver to said second transceiver based on said round propagation trip delay; determining by said second transceiver a received time reference point and said received digital time information from the signal structure of the first received ultra wideband signal; and setting said second time clock in accordance with said received digital time information, said received time reference point, and said propagation delay.