Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1995-12-15
1999-03-16
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
342465, 455456, A01S 302
Patent
active
058835989
ABSTRACT:
A position location system includes multiple base stations spaced over a region. A portable unit within the region transmits a locating signal which is received by the base stations. The base stations report amplitude, phase and time data related to the locating signal to a control station. The control station includes a processor and memory that combine the data from all of the participating base stations to directly compute an optimal estimate of the location of the portable unit. The control station generates an ambiguity function based upon the probability that the portable unit is located at a particular position. By optimizing the ambiguity function, the error in the computation is minimized to produce an accurate position estimate.
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Bussgang Julian
Parl Steen A.
Weitzen Jay
Zagami James M.
Issing Gregory C.
Signatron Technology Corporation
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