France Telecom

France Telecom Sa

Telediffusion De France S.a.

Zodiac Data Systems

Etat Francais (Cnet) and Telediffusion De France

France Telecom & Telediffusion De France Tdf

Ecole Superieure D'electricite

Jacques Palicot

Yves Louet

Christian Roland

Vincent Gouldieff

Moise Djoko Kouam

Constantinos Berberidis

Steredenn Daumont

Yann Thomas

Jacques Veillard

Désiré Guel

A method for estimating parameters of a single signal or mixed-frequency signals in a given frequency band comprises: receiving the signal(s); calculating a spectral correlation function having variables f and &#x3b1; (cyclic frequency) for different values of L taken from a set of q strictly positive values, where, for each q, &#x3b1; can independently take on one or more discrete values and/or cover one or more value ranges; from each calculation, extracting a set of local maxima detected on the basis of the variables f and &#x3b1; or on the basis of variable f for each discrete value of &#x3b1;, each of said peaks being characterized by a triplet [LAp, LFp, L&#x3b1;p], LFpand L&#x3b1;pbeing the frequency and cyclic frequency of said triplet, respectively, and LApbeing the amplitude; and identifying groups of triplets as being the signature left by a set of parameters making up the signal(s).

Method for estimating parameters of signals contained in a frequency band

A method for processing radio signals of a plurality of radio communication standards occupying a broadband frequency having a step which consists in broadband analysis to acquire information on the signals contained in the frequency broadband and selecting an appropriate narrowband processing to demodulate the radio signals; and a step which consists in processing in narrowband the radio signals contained in the frequency broadband to demodulate them.

Processing method for a broadband digital radio receiver signal and corresponding radio reception architecture

Decision feedback filter device in the frequency domain

Digital time signal filtering method and device for transmission channel

The field of the invention is that of data processing modules placed in a receiver of a data transmission or emission network, and charged with the equalizing and time-pulse recovery of the received data, in order to furnish to the next elements of the chain of the receiver a clear signal with a clean and resynchronized clock phase. The objective is to provide a device extending the limits of restoring the service in the case of strong disturbances of the channel. According to the invention, the device comprises in particular a timepulse recovery circuit (42) arranged in retroactive relooping at the output of the digital equalizer (56) in order to control the said ADC (41) feeding the equalizer, means to stabilize the calculation of filtering coefficients, comprising means to control the interruption of the calculation of new filtering coefficients, according to a criterion of crossing of a threshold of satisfactory equalizing, and means (57) to control the resetting of the filtering coefficients, according to a criterion of crossing of a threshold of maximum operating deviation of the filtering module.

Data receiving device with delayed equalization and retroactive

Growing community of inventors

Rennes, France

Jacques Palicot