High-resolution ranging and location finding using...

Details High-resolution ranging and location finding using... High-resolution ranging and location finding using...

H - Electricity

04

B

H04B 17/00 (2006.01) H04W 64/00 (2009.01) G01S 1/20 (2006.01) G01S 5/10 (2006.01) G01S 13/82 (2006.01) H04B 14/08 (2006.01)

Patent

CA 2730845

The invention relates to methods and systems for accurate ranging and geo-locationing using coherent multicarrier (CM) signals and based on a high- resolution estimation of a receiver timing offset in a signal receiver that receives ranging CM signals. A transmitter transmits a ranging CM signal having a known subcarrier modulation pattern. The receiver samples the ranging CM signal it receives reflected back from an object or from the remote transmitter, and processes the sampled signal that preserves relative subcarrier phases using a high-resolution model channel response function to determine the receiver timing offset with resolution much better than the receiver sampling period. The receiver timing offset is used to determine a flight time for the ranging CM signal with high accuracy.

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