Other

France Telecom Sa

Telediffusion De France S.a.

Dominique Lacroix

Bertrand Sueur

Pierre Combelles

Ali M Jalali

Pierre Leray

A method of calculating the fast Fourier transform or the inverse fast Fourier transform of a series of N real samples x(n), with N power of two, operating according to a time interleaving algorithm and providing the sample series X(n) in ascending order to index n and using limited calculating storage means. A method of calculating the fast Fourier transform or the inverse fast Fourier transform of a series of N conjugated complex samples X(n), with N power of two, operating according to a frequency interleaving algorithm.

Method for computing fast Fourier transform and inverse fast Fourier transform

A method for estimating an interference phase shift when receiving a multicarrier signal formed of a time series of symbols modulating a plurality of carrier frequencies, at least some of the carrier frequencies of at least some of the symbols bearing reference elements, whereof the value at transmission level is known by the receiver carrying out the reception. The phase variation &dgr; between at least two symbols bearing reference elements is estimated by analysing the reference elements. Each of the reference elements in the estimation is weighted by information representing the noise affecting the carrier frequency bearing the reference element.

Process for estimating a parasite phase shift during reception of a multi-carrier signal and the corresponding receiver

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Rennes, France

Dominique Lacroix