Title :
Performance of different code families in SAC-OCDMA systems impaired by GVD
Author :
Salehi, Mohammad Reza ; Abiri, Ebrahim ; Dezfouli, Mehran ; Kazemi, Keyvan
Author_Institution :
Dept. of Electr. & Electron. Eng., Shiraz Univ. of Technol., Shiraz, Iran
Abstract :
In this paper, three main code families for spectral amplitude coding optical code division multiple access (SAC-OCDMA) systems in terms of performance are compared when the system is affected by group velocity dispersion (GVD). The results show that m-sequence codes have the best performance compared to Walsh-Hadamard and modified quadratic congruence (MQC) codes. In addition, a SAC-OCDMA system with 7 users and m-sequence codes is simulated and the impact of GVD is compensated using a chirped fiber bragg grating. The results exhibit a wide opening in the eye diagram as well as a great improvement in the system bit error rate.
Keywords :
Bragg gratings; code division multiple access; code division multiplexing; encoding; error statistics; m-sequences; optical fibre networks; GVD; MQC codes; SAC-OCDMA systems; Walsh-Hadamard codes; bit error rate; chirped fiber bragg grating; code family; group velocity dispersion; m-sequence codes; modified quadratic congruence codes; spectral amplitude coding optical code division multiple access; Bit error rate; Optical fiber dispersion; Optical fibers; Optical pulses; Receivers; Optical code division multiple access; Walsh-Hadamard code; group velocity dispersion; m-sequence; modified quadratic congruence code;
Conference_Titel :
GCC Conference and Exhibition (GCC), 2011 IEEE
Conference_Location :
Dubai
Print_ISBN :
978-1-61284-118-2
DOI :
10.1109/IEEEGCC.2011.5752596
