OFFH-CDMA Merged M-Sequence/Hyperbolic Code for Two Weights One Length WDM System

Ferchichi Moez, Najjar Monia, Rezig Houria
2008 2008 Third International Conference on Systems and Networks Communications  
In this paper, we propose an extension of two dimensions (2D) code cardinality for slightly the same performance (BER). The code, developed for optical code division multiple access (OCDMA) system is generated by: hyperbolic code for the Time Spreading and merged M-sequences for the Frequency-Hopping, in this work we consider the Optical Fast Frequency Hopping technique (OFFH). For the families codes we apply the constraint of cross-correlation which is equal to one in order to decrease the
more » ... iple Access Interference (MAI). The frequency spacing is selected according to WDM standardization. Optical delay lines and Fiber-Bragg gratings (FBG) are the elements constituting the encoder/decoder utilized to generate/decode the code words. For the same transmission rate (the same code length), compared with the 2D code employing prime code for the time spreading, the extension will increase the cardinality to P(P-1)2 users (proposed code) than P2 users (comparison code) for a given optical LAN code words group and two qualities of service (QoS) are proposed rather than one.
doi:10.1109/icsnc.2008.65 dblp:conf/icsnc/FerchichiNR08 fatcat:55tm3ohnezdivejzklatundkwq