Matra Communication

Societe Francaise Du Radiotelephone

Societe Pour La Conception Des Applications Des Techniques Electroniques

Philippe Lucas

Philippe Mege

Hervé Noui

Philippe Mercier

Arnaud Capitant

Christophe Francois

Sophie Frey

Abdallah Hitti

Olivier Jean-Marie

Jean-Pierre Wary

Stephane Pineau

A photo-curing device includes a light source for initiating the curing of a photo-curable material. The light source has light-emitting diodes, each emitting light in a determined wavelength range, the wavelength ranges of the LEDs overlapping partially so as to cover a continuous wavelength range that is broader than the wavelength range of each LED. An activation device is provided for selectively activating each LED.

Spectral scanning photocrosslinking device

The invention relates to a process for making a secure remote payment for goods and/or a service purchased by the buyer () from a supplier () using a mobile radiotelephone () used by the buyer. The mobile radiotelephone provides access to a radio communications network () managed through a management center (). A payment server () is connected to the radio communications network (). The process according to this invention comprises a step in which the said management center () and/or the said payment server () and/or a control center identifies the said buyer (), identification of the buyer consisting of ensuring that the buyer is a bonafide subscriber registered on a list of subscribers to the said radio communications network (). The process may also include a step to authenticate the said buyer ().

Process for making remote payments for the purchase of goods and/or a service through a mobile radiotelephone, and the corresponding system and mobile radiotelephone

A synchronization method includes selecting, at a mobile station, at least one periodic pseudorandom sequence (PN) which corresponds to, and is synchronized with, the reference sequence transmitted by a base station on a pilot channel, and received by the mobile station over a propagation path, this operation being carried out regardless of the frequency deviation between the transmitter and the receiver. Various possible sequences are tested by calculating the quantities E[s(t).multidot.s*(t-.tau.)] and E[s(t).multidot.s*(t)], where E[.multidot.] designates the mean value calculated over a predetermined integration time, .tau. designates a predetermined delay, and s(t)=r(t).multidot.c(t) designates the product of the received base band signal r(t) and the value (c(t)) of the tested sequence, and by calculating the ratio .vertline.E[s(t).multidot.s*(t-.tau.)][.vertline./Es(t).multidot.s*(t)]. The sequence under test is selected if the ratio exceeds a predetermined threshold.

Method of synchronization for code division multiple access

A base station constructs CDMA channels, each defined by a respective spreading sequence which modulates information bits to be transmitted for forming a respective channel signal. The different channel signals are combined, and then modulated on a carrier frequency, so as to produce a phase shift keyed radio signal which is transmitted towards mobile stations. Each spreading sequence has only one real component. For producing the radio signal, a relative phase shift is applied between different channel signals.

Transmission method for CDMA radiotelephone communications, and

Each path is identified by a delay which is applied to at least one spreading sequence for determining a correlation between the received signal ans said spreading sequence. For each selected delay, a reception energy, contained in the CDMA signal consisting of a correlation between the received signal and a reference spreading sequence, is estimated. Delays to be tested are randomly chosen with a choice probability having a maximum for a delay substantially equal to the smallest selected delay. The delays thus chosen are tested by estimating the reception energy associated thereto. When the reception energy for a tested delay is greater than at least one of the reception energies associated to the previously selected delays, the tested delay is substituted for the previously selected delay having the smallest reception energy.

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Palaiseau, France

Philippe Lucas