Title :
Synchronous versus asynchronous CDMA for fiber-optic LANs using optical signal processing
Author :
Kwong, W.C. ; Prucnal, P.R. ; Perrier, P.A.
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., NJ, USA
Abstract :
Synchronous spread-spectrum code division multiple access (S/CDMA) for fiber-optic local area networks using optical signal processing is investigated. Compared to time division multiple access (TDMA), CDMA can provide some degree of immunization against fiber dispersion. Moreover, S/CDMA can accommodate more subscribers and a larger number of simultaneous users than asynchronous CDMA (A/CDMA). A/CDMA is a more suitable protocol in fiber-optic interexchange or long-haul networks where the number of users is less and network synchronization cannot easily be achieved. The design of the code sequences, suited for asynchronous access and incoherent optical signal processing, is studied. A two-user S/CDMA system demonstration at 500 Mbit/s is reported
Keywords :
code division multiple access; digital communication systems; local area networks; optical fibres; optical information processing; optical links; 500 Mbit/s; asynchronous CDMA; code division multiple access; computer networks; fiber-optic LANs; fiber-optic interexchange; local area networks; long-haul networks; optical signal processing; protocol; synchronous CDMA; Autocorrelation; Local area networks; Multiaccess communication; Optical design; Optical fiber LAN; Optical fiber networks; Optical signal processing; Spread spectrum communication; Throughput; Time division multiple access;
Conference_Titel :
Global Telecommunications Conference and Exhibition 'Communications Technology for the 1990s and Beyond' (GLOBECOM), 1989. IEEE
Conference_Location :
Dallas, TX
DOI :
10.1109/GLOCOM.1989.64112
