Alcatel

Tcl Communications Technology Holdings Limited

Ipg Electronics 504 Limited

Alexandre Da Rocha

Jean-Hugues Perrin

Elie Bejjani

Laurent Rouvellou

Paul Anandanarayanane

Javier Sanchez

Philippe Leprieur

Michael Guilbaud

A receiver of a mobile radio terminal in a telecommunication system includes a radio frequency signal generator, a frequency transposer, a high-pass filter which filters a static component and a dynamic component of interference induced by the operation of the radio frequency generator and the frequency transposer, and a digitizer. The high-pass filter has a predetermined cut-off frequency to eliminate the static component and a portion of the dynamic component before the signal enters the digitizer. A residual dynamic component is eliminated by a digital filter placed after the digitizer and a corrector.

Receiver for a mobile radio terminal

The present invention relates to a method of switching from a first mobile radio mode to a second mobile radio mode in a multimode mobile radio terminal having a first part and a second part respectively operating in compliance with first and second radio access technologies and respectively provided with first and second clocks, the method including the following steps:

Method of switching from a first mobile radio mode to a second mobile radio mode and an associated multimode mobile terminal

A method of correcting frequency errors for use in CDMA mobile radio terminals which is adaptive, depending on the value of the frequency error. There are thus three different frequency error correction processing modes: a processing mode with no correction, an open-loop processing mode for coarse correction, and finally a closed-loop processing mode for very accurate correction. The frequency error processing modes are selected by a central control unit as a function both of the value of the frequency error and of quality factor determined by a quality control unit of a channel coefficient filter.

Method of correcting frequency error

A receiver device for a mobile radiocommunication unit communicating with a base station via a propagation channel includes a pathfinder for determining the time-delays associated with a multipath signal, a channel estimator supplying an estimate of the propagation channel to a filter unit, which can be made up of a bank of Wiener filters, which optimizes the estimates of the propagation channel, and to a speed estimator that supplies the estimated speed of the mobile radio communication unit to the filter unit so as to select the appropriate filter corresponding to the speed estimate.

Receiver device for a mobile radiocommunication unit employing a speed estimator

Receiver for enhanced performance for CDMA radio transmission comprising roke receiver with a path searcher ( ), a channel estimator ( ) and a combiner ( ) for selecting optimal paths where the path searcher selects a set of path delays ( ) with an instantaneous profile analyzer ( ), an averaging filter ( ) and a path selector ( ) where at least two instantaneous profile analyzers ( ) are connected to the averaging filter ( ).

Receiver and method with enhanced performance for CDMA transmission

Receiver for enhanced performance for CDMA radio transmission comprising a Rake receiver ( ) with a path searcher ( ), a channel estimator ( ) and a combiner ( ) for selecting optimal channels paths where the path searcher ( ) selects a set of path delays ( ) where at least two path searchers ( ) are connected in way that the output of the first path searcher ( ) is linked to one input of the second path searcher ( ).

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Santa Clara, CA, United States of America

Alexandre Da Rocha