2026-05-06T08:19:32Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/97482024-11-30T01:05:20Zcom_10259_9737com_10259_5086com_10259_2604col_10259_9738

00925njm 22002777a 4500 dc Rojas Guillama, Borja author Guerra Medina, Marcos Fulgencio author González Hernández, Oswaldo author Martín González, Jesús Ángel author Delgado Rajó, Francisco Alberto author Rodríguez Pérez, Silvestre author 2011-09 An optical code-division multiple access system (OCDMA) is presented for visible light communications (VLC). The OCDMA scheme is based on the recently proposed random optical codes (ROC), which do not present optimal correlation properties but are characterized by their ease of generation when large number of simultaneous users are considered. The synchronism mechanism when using ROCs is an important issue which is adequately addressed and solved by the designed system. An experimental prototype has been developed which allows us to transmit medium-quality audio data from several emitting sources simultaneously through different channels (using different codes), obtaining a practically error-free reception (imperceptible by the human ear) which perfectly agrees with the theoretical analysis. http://hdl.handle.net/10259/9748 Sistema OCDMA para comunicaciones en el espectro visible basado en códigos ópticos aleatorios