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:
Jan. 26, 2010
Filed:
Dec. 12, 2006
Ralf Klotsche, Neuenbürg, DE;
Klaus Wünstel, Schwieberdingen, DE;
Thomas-rolf Banniza, Schwieberdingen, DE;
Ralf Klotsche, Neuenbürg, DE;
Klaus Wünstel, Schwieberdingen, DE;
Thomas-Rolf Banniza, Schwieberdingen, DE;
Alcatel Lucent, Paris, FR;
Abstract
A Doppler compensation method is used for radio transmission between a mobile body possibly but not exclusively a train and some base station, both mobile body and base station comprise respectively a transceiver connected to an antenna for the radio transmission. The method comprises the step of determining the direction of motion of the mobile body with respect to the active base station i.e. the base station to which a radio transmission link is just built. The method is then followed by the step to apply a constant Doppler compensation corresponding to the cancellation of the Doppler effect for a mobile body moving in the same direction at predefined limiting speed of motion (v) at which a quality threshold is reached with the used radio transmission technology in the case without a Doppler compensation.