Diseño De Sistemasen Silicio, S.a.

Diseno De Sistemas En Silicio

Francisco Javier Jimenez Marquina

Jorge Vicente Blasco Claret

Juan Carlos Riveiro Insua

Nils Hakan Fouren

Salvador Iranzo Molinero

Jose Luis Gonzalez Moreno

José Abad Molina

Carlos Pardo Vidal

Juan Miguel Gavillero Martín

Alejandro Matas Bonilla

Francisco José Andres Navarro

Victor Dominguez Richards

María Teresa Forment Tarrega

The system includes a plurality of user kits and a head-end kit in bi-directional communication over the electricity network. Its essential characteristics are: carrier by carrier treatment of transmission and reception signals and control of transmission power in each kit. The system makes it possible to reach the maximum the number of users, it maximizes transmission capacity, it admits signals coming from users situated at varying distances both near and far, it avoids the production of overflows, it introduces the maximum average power for the range available to the communication and it minimizes the number of bits necessary for the analog/digital conversion in reception.

Automatic gain control system for multi-user digital OFDM transmission systems over the electric network

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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Valencia, Spain

Francisco Javier Jimenez Marquina