Diseño De Sistemasen Silicio, S.a.

Diseno De Sistemas En Silicio

Juan Miguel Gavillero Martín

Jorge Vicente Blasco Claret

Juan Carlos Riveiro Insua

Nils Hakan Fouren

Francisco Javier Jimenez Marquina

Salvador Iranzo Molinero

Jose Luis Gonzalez Moreno

Carlos Pardo Vidal

Francisco José Andres Navarro

Victor Dominguez Richards

María Teresa Forment Tarrega

The system in this invention is applicable to bi-directional communication over the electricity network between a head-end and a plurality of users, and permits the synchronization in time and frequency of multiple users in a multi-carrier OFDM communication system. It is characterized in that it consists of the generation of synchronization sequences by means of two identical synchronization symbols, periodically transmitted in the downstream, from the head-end to the users to estimate and correct the sampling frequency and simultaneously estimate the moment in which each OFDM symbol commences.

Process for synchronization in the downstream of multiple users in a point multipoint system with OFDM modulation

The system enables bidirectional communication between a center and a plurality of users via a power line network and is characterized in that low and high speed communication can be established to provide multiple high-quality services to the users. The system comprises a performing network and frequency time-sharing and/or orthogonal frequency-division multiple access (OFDMA).

Point to multipoint system and process for the transmission over the electricity network of digital data

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Burjasot, Spain

Juan Miguel Gavillero Martín