Canon Kabushiki Kaisha

St-ericsson Sa

Koninklijke Philips Corporation N.V.

Stmicroelectronics (grand Ouest) Sas

Ericsson Modems Sa

Telefonaktiebolaget Lm Ericsson (publ)

Samuel Rousselin

Philippe Le Bars

François Thoumy

Lionel Le Scolan

Frédérique Ehrmann

Yann Le Gal

Richard T Behrens

Patrice Nezou

Pascal Rousseau

Marvin Leroy Vis

Mohamed Braneci

Didier Harnay

Jing Liang

Stephane Pineau

Emmanuel Langouet

Luigi DiCapua

Stéphane Pineau

A stepper motor is driven according to step driving modes including a full-step driving mode, a half-step driving mode and micro-stepping modes. The stepper motor may also be driven in an acceleration phase. A method of controlling the stepper motor includes controlling the current step driving mode of the motor by a processing unit. During the acceleration phase of the stepper motor and the stepper motor being in driven in a current step driving mode other than the full-step driving mode, the processing unit tests, after each speed increase, if a remaining computing power of the processing unit is sufficient for control of the stepper motor to remain in the current step driving mode, and if not the processing unit, in presence of a first switching condition, switches control of the stepper motor to the driving mode having the closest coarser step.

Method for adaptively driving a stepper motor, and corresponding device

A mobile telephony radiocommunication management process, with first time slots and second time slots being provided independently of each other, said process comprising the default selection of first time slots for transmitting/receiving first bursts corresponding to these first time slots, and in the case of a first time slot at least partially overlapping with a second time slot, choosing the first time slot or the second time slot, for respectively transmitting/receiving the first burst corresponding to the first time slot or receiving the second burst corresponding to the second time slot, with this choice being made so as to minimize the number of second bursts received for a given result.

Increased throughput in radio-frequency communications

A resource management unit for a mobile telephone terminal, with the terminal comprising radio transmission/reception means for transmitting and receiving radio frequency signals corresponding to bursts of symbols during allocated time slots, and a device able to operate in a first mode and in a second mode, said device interfering less with the transmission/reception of radio frequency signals when it is in the first mode than when it is in the second mode. The resource management unit is able to cause the device to change from one of the first and second modes to the other of the first and second modes during the same time slot.

Resource management for a mobile telephone terminal

A wireless communication system is provided that detects a frequency burst (FB) through analysis of the autocorrelation function of received signals. The system can accommodate the relatively large frequency offsets that are associated with less expensive reference frequency crystals. The system employs a multi-mode filter including an FB filter and a channelization filter. In one embodiment, the FB filter is employed until an FB is located and then, once the FB is located, the channelization filter is employed to receive signals.

Wireless communication system and method with frequency burst acquisition feature using autocorrelation

In order to evaluate the noise related to data issuing from a turbo-encoder, estimates of the noise related to its systematic output, to the data issuing from its first elementary encoder, and to the data issuing from its second elementary encoder are determined. At least two of the estimates of the noise related to the systematic output, to the data issuing from the first encoder, and to the data issuing from the second encoder, are added. The results of these additions are divided by the number of augends added, and then inverted, so as to obtain a noise factor, and the noise factor is multiplied with the data issuing from at least one of the first encoder, second encoder, and systematic output.

Method and device for evaluating the noise associated with turbocodes, and systems using them

The method of transmitting data in the form of symbols sent over an electromagnetic channel is characterized in that a measurement of significance is attributed to each group of data to be transmitted, in that the transmission reliability of the carriers is estimated dynamically, and in that the most significant data are sent over the most reliable carriers at each instant, the other data being sent over the carriers of decreasing reliability, in decreasing order of significance of the data.

Device and method for the dynamic allocation of frequencies for multicarrier modulation systems

The present invention concerns a method and an apparatus of generating a reference event in a receiving node receiving frames of information, when a frame of information is received, the method and the apparatus sample the frame of information in order to form sampled data, process sampled data in order to detect among said sampled data a specific data, monitor the number of processed sampled data until the detection of a specific data and generate a reference event according to the result of processing and monitoring.

Method and device of generation of one reference event from a frame of information

A radio device includes a receiving part ( ) formed by a high-frequency selective amplifier stage ( ) including a frequency selective circuit ( ) having a plurality of capacitive elements ( ), any one or more which can be selectively connected into the selective circuit in dependence on a control magnitude stored in a storage element ( ) in order to tune the selective circuit to a certain frequency. Under the control of a microprocessor ( ) the stored control magnitude is set to that which gives the best level measured by a level detector ( ) at the output of the amplifier stage. The microprocessor varies the control magnitude to produce a series of alternate connections into the selective circuit of each and every combination of one or more of the reactive elements, receives the measurement by the level detector of the level at the output of the amplifier stage or each control magnitude, and selects the control magnitude giving the best level.

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Rennes, France

Samuel Rousselin