2026-05-06T13:14:37Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/97462024-11-30T01:05:19Zcom_10259_9737com_10259_5086com_10259_2604col_10259_9738

Martín González, Jesús Ángel González Hernández, Oswaldo Poves Valdés, Enrique López Hernández, Francisco José Rodríguez Pérez, Silvestre 2024-11-29T09:37:50Z 2024-11-29T09:37:50Z 2010-09 http://hdl.handle.net/10259/9746 Comunicación presentada en: XXV Simposium Nacional de la Unión Científica Internacional de Radio (URSI). En Bilbao (Spain), 15-17 septiembre 2010 In this paper, a technique for code acquisition in optical code-division multiple-access (OCDMA) systems using the recently introduced Random Optical Codes (ROCs) is presented. The acquisition scheme, which is based on the transmission of a synchronization preamble, is described. This scheme is a modification of another one previously presented [1], where the phenomenon which we have called “auto-collision” is now resolved. The equations that allow us to establish an upper bound for the acquisition performance are indicated and several results which prove the reliability of these expressions are presented. These results show that the acquisition scheme is practically infallible when the synchronization preamble is constituted by three or four bits, irrespective of the multi-user interference, then making it very appropriate for optical communications over very saturated scenarios (with a large number of users). Este trabajo ha sido apoyado por la European Space Agency (ESA, proyecto “Optical Wireless Intra-Spacecraft Communication”, ESA Contract 19545/06/NL/GLC), el Plan Nacional del Ministerio de Ciencia e Innovacion (TEC2009-14059-C03) ´ y el Gobierno de Canarias (SolSubC200801000306). application/pdf spa Telecomunicaciones Radio Telecommunication Esquema de sincronismo para sistemas OCDMA basado en códigos ópticos aleatorios info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/acceptedVersion info:eu-repo/semantics/openAccess