The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 2006
Filed:
Aug. 04, 1999
Corinne Bokhomme, Sergy, FR;
Jean-louis Dorusletter, Choiseul, FR;
Nidhour Beu Rached, Paris, FR;
Nortel Matra Cellular, , FR;
Abstract
The invention relates to a method of estimating the speed (v) of a mobile station connected by a radio transmission channel to a remote station, said method including the following successive steps: receiving and filtering a transmission signal (s) to obtain a measuring signal reflecting time variations of said transmission channel, determining a correlation function (R(τ)) of said measuring signal parametered by the mobile station speed (v), seeking the value (R″(0)) of the second derivation of said correlation function at the origin, estimating the first derivative (α) of the measuring signal and calculating the variance (C) of the estimate, and identifying the results obtained during the preceding two steps (R″(0)=C).