METHOD AND APPARATUS FOR DETERMINING LOCATION USING SIGNALS-OF-OPPORTUNITY

Title:

METHOD AND APPARATUS FOR DETERMINING LOCATION USING SIGNALS-OF-OPPORTUNITY

Document Type and Number:

WIPO Patent Application WO/2011/156426

Kind Code:

A3

Abstract:

A signal-of-opportunity location device (SOLD) that may be situated in a complex radio propagation environment with multiple RF signal obstructions receives RF signals from a distant transmitter. The RF signals from the distant transmitter interact with obstructions in the propagation environment local to the SOLD. The local obstructions perturb the RF signals causing the RF signals to exhibit near field behavior in the complex radio propagation environment. The SOLD receives the locally perturbed signals. The SOLD detects signal characteristics of RF signal components of the received signals and compares these signal characteristics with reference data in a reference data store to determine the current location of the SOLD.

Inventors:

SCHANTZ HANS G (US)
UNDEN ALFRED HANS (US)
RICHARDS ERIC A (US)
DEPIERRE ROBERT E (US)

Application Number:

PCT/US2011/039522

Publication Date:

April 19, 2012

Filing Date:

June 07, 2011

Export Citation:

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Assignee:

Q TRACK CORP (US)
SCHANTZ HANS G (US)
UNDEN ALFRED HANS (US)
RICHARDS ERIC A (US)
DEPIERRE ROBERT E (US)

International Classes:

G01S5/02

Foreign References:

US6026304A	2000-02-15
US20030043073A1	2003-03-06
US6011515A	2000-01-04
US20020196187A1	2002-12-26
US20040032363A1	2004-02-19