2026-04-19T20:46:34Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/104492025-05-10T00:05:14Zcom_10259_9737com_10259_5086com_10259_2604col_10259_10448

González Hernández, Oswaldo Martín González, Jesús Ángel Guerra Medina, Marcos Fulgencio López Hernández, Francisco José Delgado Rajó, Francisco Alberto 2025-05-09T07:46:34Z 2025-05-09T07:46:34Z 2015-05 0013-5194 http://hdl.handle.net/10259/10449 10.1049/el.2014.4417 1350-911X An optical code-division multiple access (OCDMA) scheme based on cyclic shift extension of a base code is proposed to enable asynchronous multi-user optical wireless communications for very populated scenarios. This multiple access method is convenient for low–medium data rate communications of a large number of simultaneous transmitters. An expression to obtain a tight upper bound of the bit-error probability of the new scheme is provided which is also confirmed by experimental results. A variant of the proposed communication method which allows the encoding of several bits per symbol is also presented, although its analysis demonstrates that the first simpler strategy reaches similar performance with a significantly lower receiver complexity. This work has been supported by the SpanishGovernment (MINECO) and the European Regional DevelopmentFund (ERDF/FEDER) programme under projects TEC2013-47682-C2-2-P and TEC2013-47682-C2-1-P. application/pdf eng The Institution Of Engineering and Technology Electronic Letters. 2015, V. 52, n. 11, p. 847-849 https://doi.org/10.1049/el.2014.4417 Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/ info:eu-repo/semantics/openAccess Telecomunicaciones Telecommunication Cyclic code‐shift extension keying for multi‐user optical wireless communications info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Electronics Letters 51 11 847 849