Annales Des Télécommunications
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Théorie Aérodynamique de la Sirène Laryngée
Annales Des Télécommunications - Tập 20 Số 3-4 - Trang 81-90 - 1965
Polarization switching of an er :yb :cr: phosphate glass microchip laser
Annales Des Télécommunications - Tập 52 - Trang 588-593 - 1997
We show that the light of a commercially available Er:Yb:Cr.-phosphate glass microchip laser end-pumped at 977 nm by an InGaAs laser diode can be switched between two linear polarization eigenstates when it is submitted to a polarized optical feedback. The flip occurs when the feedback phase is scanned by the external cavity length. In our experiments the laser diode light is confined to a fiber w...... hiện toàn bộ
Analysis of a new annular multi-slits antenna using wave concept iterative process in cylindrical coordinates
Annales Des Télécommunications - Tập 66 - Trang 383-394 - 2010
In this paper, a new antenna for satellite applications is proposed. This antenna is designed to operate at any frequency desired. It consists of a circular microstrip patch antenna which incorporates concentric annular slits, and it is printed on a grounded substrate. The details of the proposed antenna design and numerical results are presented and discussed. The wave concept iterative procedure...... hiện toàn bộ
La synthèse des réseaux an paires de bornes
Annales Des Télécommunications - Tập 7 - Trang 517-524 - 1952
L’auteur a écarté le cas des réseaux purement réactifs, parce que bien connu. Il analyse la méthode deGewertz pour le quadripôle et montre comment il a pu l’étendre au cas du réseau àn paires (méthode de matrices réduites). Ensuite il expose les grandes lignes des méthodes qui ont, pour commun moyen auxiliaire, la détermination d’un réseau purement réactif qui, après fermeture de certains accès su...... hiện toàn bộ
Fractionally spaced linear and DF Mimo equalizers for multitone systems without guard time
Annales Des Télécommunications - Tập 52 - Trang 21-30 - 1997
Quand les modulateursofdm ou multiporteuses sont utilisés, la dispersion du canal est généralement combattue par ľintroduction ďun temps de garde. Une autre approche consiste à concevoir des récepteurs capables ďégaliser les interférences entre symboles et entre canaux. Dans cet article, on montre comment calculer des égaliseurs à espacement fractionnaire et à décision réfléchie. Des solutions ave...... hiện toàn bộ
Children, security and new media: a review of anglo-saxon research
Annales Des Télécommunications - - 2007
Space-time code selection via particle swarm optimization
Annales Des Télécommunications - Tập 75 - Trang 59-66 - 2019
In this paper, the space-time code selection technique for multiple-inputs single-output systems is optimized using particle swarm optimization. We considered both variable-rate and constant-rate strategies. For a variable-rate technique, we address the problems of minimizing the bit-error rate for a given throughput objective and maximizing the throughput for a given bit-error rate objective. For...... hiện toàn bộ
Computation of the field radiated by a FM transmitter by means of ordinary kriging
Annales Des Télécommunications - Tập 66 - Trang 429-443 - 2011
The maintenance of frequency modulation (FM) broadcasting sites is one of the activities of TDF to guarantee the availability of broadcasting services for its clients. As it is not always possible to stop the broadcasting due to the large number of listeners, TDF has to guarantee the safety of workplaces with respect to the limits of exposure to electromagnetic fields inside the mast near the ante...... hiện toàn bộ
Fast liquid crystal end-less polarisation controller for first order PMD compensation
Annales Des Télécommunications - - 2003
Security and privacy in IoT communication
Annales Des Télécommunications - Tập 74 - Trang 373-374 - 2019
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