Patent · US Active

Doppler compensation control for radio transmission

US7653347B2 · kind B2 · utility

6Cited by

25References

14Claims

0Family size

Assignee

Alcatel Lucent · FR

Inventors

Ralf Klotsche · Neuenbürg, DE
Klaus Wunstel · Schwieberdingen, DE
Thomas-Rolf Banniza · Hemmingen, DE

Key dates

Filing date	Dec 12, 2006
Grant date	Jan 26, 2010
Priority date	—
Expiry date	Aug 22, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH04W56/0035
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

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 (vlimit) at which a quality threshold is reached with the used radio transmission technology in the case without a Doppler compensation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.