Airbus Ds Slc

Eads Telecom

Nortel Networks France

Olivier Gagey

Christophe Molko

Philippe Mege

Olivier Perrin

Xavier Checoury

Fabrice Belveze

A delay circuit for time offsetting an input radiofrequency signal, includes an all-pass filter having a given central frequency to linearize a phase-shift of an output signal relative to the input signal as a function of the frequency on a first frequency range; and first and second antiresonant circuits having respectively first and second central frequencies, the all-pass filter and the antiresonant circuits configured to linearize the phase-shift of the output signal relative to the input signal as a function of the frequency on a second frequency range including the first range. The difference between first and second central frequencies is less than 30% of the value of one of both frequencies, the difference between the first central frequency and the given central frequency of the all-pass filter is less than 30% of the value of a highest frequency between the first central frequency and the given central frequency.

Delay circuit for a radio signal with filter circuitry to linearize a phase shift of an output signal relative to an input

A device for processing a received signal by a receiver disrupted by a transmitter, wherein the transmitters and receiver are co-located, includes: a first coupler configured to take a first reference signal; an analog circuit for processing the first reference signal; a second coupler configured to combine the modified reference signal with the signal received by an antenna of the receiver; a first analog-to-digital conversion module digitizing the first reference signal; the second analog conversion module digitizing the combined signal in order to deliver a digital combined signal to the digital signal-processing device, wherein signal-processing device delivers a resulting digital signal to a data-processing module of the receiver device.

Device and method for processing a signal received by a receiver disrupted by a transmitter

The invention concerns a device for producing a phase and amplitude modulated signal (G) suitable for radio transmission via an antenna (), based on the EER technique and means () for temporal clamping of a phase controlling signal (D) and an amplitude controlling signal (F) so that the phase modulating component is synchronized with the amplitude modulating component in the output signal (G).

Device for producing a phase and amplitude modulated radio frequency signal

An amplitude- and frequency- or phase-modulated radio frequency signal generator that is used for radio emission, generates a phase or frequency control signal and an amplitude control signal from a phase or frequency modulation signal and from an amplitude modulation signal respectively. The generator comprises a phase or frequency modulator and a variable-gain radio frequency power amplifier. The amplitude of the output signal is automatically controlled. In addition, adaptive pre-distortion is carried out in order to pre-distort the phase or frequency control signal in accordance with the amplitude modulation signal during a permanent operating phase. During a learning phase, a pre-distortion module is adapted from the amplitude modulation signal and from the amplitude control signal.

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Paris, France

Olivier Gagey