Title :
A novel quasi-synchronous coherent time-spreading optical CDMA system
Author :
Ji, Jianhua ; Gong, Fangping
Author_Institution :
Advanced Technology Research Center of Shenzhen University, China, 518060
Abstract :
In coherent time-spreading OCDMA, beat noise is the main performance limitation. We propose a novel quasisynchronous coherent time-spreading optical CDMA, where the synchronization among users can be controlled within permissible time delay. Within permissible time delay, the mean intensity of aperiodic cross-correlation equals zero, and the beat noise can be removed. Simulation of four simultaneous users employing LA sequence (156, 8,16) is demonstrated, where the fiber link consists of 10km single-mode fiber, plus 1 km Dispersion Compensating Fiber. It can be seen that, beat noise can be removed in quasi-synchronous coherent time-spreading optical CDMA system.
Keywords :
Bit error rate; Delay effects; Detectors; Gold; Hardware; Multiaccess communication; Optical control; Optical crosstalk; Optical noise; Optical receivers; LA sequence; beat noise; optical CDMA; quasi-synchronous;
Conference_Titel :
Communications and Photonics Conference and Exhibition (ACP), 2009 Asia
Conference_Location :
Shanghai, China
Print_ISBN :
978-1-55752-877-3
Electronic_ISBN :
978-1-55752-877-3
