Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Patent
1999-03-24
2000-08-15
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
342451, 342453, G01S 316, G01S 302
Patent
active
061043443
ABSTRACT:
A method for determining a geographical location from a measured wireless signal signature comprises calculating from the measured wireless signal signature a multi-dimensional signature vector, wherein each component of the vector measures a degree of coincidence between the measured wireless signal signature and a calibrated signal signature stored in a calibration table. The method also includes matching the signature vector with vectors in a set of multi-dimensional calibrated vectors. The matching uses a procedure comprising searching a hierarchical tree structure and eliminating nodes that cannot contain the best match vector. Within the remaining nodes, the search eliminates individual vectors that cannot be the best match vector, and selects one or more vectors in the set of multi-dimensional calibrated vectors, where the matched vectors correspond to calibrated geographical locations.
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Hashemi, H, "Pulse Ranging Radiolocation Technique and its Application to Channel Assignment in Digital Cellular Radio", IEEE Vehicular Tech Conf. May 1991, pp. 675-680.
Jeng, S.S. et al, "Measurements of Spatial Signature of an Antenna Array", 6th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC '95. pp. 669-672.
Hilsenrath Oliver
Jayaraman Sriram
Lebedev Gennadi
Radionov Vladimir
Wax Mati
Issing Gregory C.
US Wireless Corporation
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