Alcatel

Alcatel Espace

Guillaume Calot

Denis Rouffet

Jacques Bousquet

Alain Feniou

Cédric Lapaille

Cyril Michel

Philippe R Sehier

Cédric Baudoin

Jean Farineau

Xavier Denis

Tarif Zein Al-Abedeen

Bertrand Duros

Yves Peligry

C&eacute;dric Lapaille

Cedric Lapaille

The invention relates to a method for the allocation of packets on a carrier containing timeslots, comprising the step of defining an interleaving length and an allocation window characterized in that packets are allocated within groups defined by the power needed for the transmission and that the size of groups is at most equal to the interleaving length.

Scheme for packet allocation in a radiocommunication system

A method for estimating a signal-to-noise ratio, in particular digital, received by a radio communication receiver. The method includes estimating separately the signal and the noise and filtering () separately the signal (E) and the noise (N) before carrying out the division () of the signal from the noise. The noise filtering is for example of the statistical type, whereas the signal filtering is of the low-pass filtering type.

Method of estimating the signal-to-noise ratio in a telecommunications receiver and an application of the method to controlling a transmitter

The invention concerns a method of transmitting non-dated digital data between a transmitter and a receiver in which the data can take at least two different paths between the transmitter and the receiver and handover from one path to another occurs during transmission. In the transmitter, packets intended for the second path are transmitted only after the last packet intended for the first path has been transmitted and in the transmitter and in the receiver packets on the first or second path are delayed in order for packets on the second path to arrive after packets on the first path. It is therefore not necessary to transmit signaling to differentiate the two paths at the receiver, which can include a single demodulator.

Packet mode telecommunications method and system in which calls can be handed over from one path to another

Method of estimating the signal to noise ratio of a digital signal received by a radiocommunications receiver

In a telecommunication network, the power of a first signal transmitted via a satellite by a first station to be received in the form of a second signal by a second station is regulated. At a given time, a value representative of a signal-to-noise ratio of the second signal is predicted for a later time, and, at an intermediate time, the power of the first signal is regulated in the first station as a function of the predicted value. The intermediate time precedes the later time by a time period substantially equal to the propagation time between the first and second stations.

Method of regulating the power of a signal transmitted by a first

The invention provides a method of regulating the power of transmission between first and second stations in a multiple satellite visibility satellite telecommunication network. The method comprises the following cyclic steps: regulation, for each of said N channels, of an isolated transmit power level command signal such that when it commands the power at which the first station transmits the first isolated signal in each channel the quality level of the corresponding isolated second signal received by the second station is equal to a reference quality level, and regulation, for all of the N channels, of N combined transmit power level command signals such that when they command the levels at which the first station respectively transmits the N first combined signals on the N channels the quality level of the global signal received formed from the N combined second signals is equal to the reference quality level. Depending on whether the isolated command signal having the minimal level is such that this minimal level is less than or greater than a maximal tolerated isolated command level, the minimal level isolated command signal is selected to command the power with which the first station transmits a call signal in the corresponding channel, or the N combined command signals are selected to command the power with which the first station transmits respective combined call signals on the N channels.

Method of power regulation in a satellite telecommunication network with

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Versailles, France

Guillaume Calot