Thales

Jean Minet

Patrick Feneyrou

Grégoire Pillet

Gregoire Pillet

A method for reducing the peak factor of a signal transmitted in a frequency band comprising several channels, the signal using a plurality of channels in the band comprises: a step of clipping the signal, a step of subtracting the clipped signal from the signal, so as to obtain a peak signal, a step of filtering the peak signal with the aid of a multichannel filter configured to comply with a predetermined spectral mask for each of the channels used by the signal, and a step of subtracting the filtered peak signal from the signal. A device for emitting a multichannel signal implementing the method for reducing the peak factor is also provided.

Method for measuring the frequency modulation of a laser source

A method for generating M demodulation signals is disclosed. In one aspect, the method includes: providing M input signals, injecting each input signal into at least one first interferometer, and detecting M demodulation signals. The method also includes choosing M positive integers that are not all equal to zero and computing M demodulation signals. The idemodulation signal being the product of R+1 functions, Rbeing the chosen integer that corresponds to the first delay of the ifirst interferometer, and the pfunction being equal to S(t)=S(t=p&#x3c4;), where p is an integer between 0 and R, &#x3c4;is the first delay introduced by the delay line of the ifirst interferometer, and S is a transform of the signal at the output of the ifirst interferometer.

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Palaiseau, France

Jean Minet