Title :
Research on the FWM of optical CDMA Transmission System
Author :
Fenfei, Hou ; Xiaohan, Sun
Author_Institution :
Sch. of Electron. Sci. & Eng., Southeast Univ., Nanjing
Abstract :
A theoretical analysis is presented to evaluate the BER performance of a direct sequence optical code division multiple access (DS-OCDMA) system with dispersion shifted fiber (DSF) considering the effect of four wave mixing(FWM). To verify the analytical expression of BER, the BER performance is evaluated using Matlab simulation with 63 chipsper bit m-sequence as well as Gold sequence and compared with analytical results. It is investigated that simulation and analytical results are similar in all cases. Further, BER performance is evaluated for 1023 chips per bit encoding using analytical expression. The BER performance is found to be degraded due to FWM effect if the transmitted power per channel and number of simultaneous users are increased. It is investigated that maximum allowable transmitted power per channel is limited due to FWM effect. It is found that the maximum allowable transmitted power per channel is limited to 15 dB for 10 users and 20 dB for 20 users for a 10 Mb/s, 1000 km system with 1023 chips per bit encoding at a BER of 10-9.
Keywords :
code division multiple access; multiwave mixing; optical fibre communication; BER; CDMA; Matlab simulation; bit error rate; bit rate 10 Mbit/s; chipsper bit m-sequence; direct sequence optical code division multiple access transmission system; dispersion shifted fiber; four wave mixing; Analytical models; Bit error rate; Correlators; Multiaccess communication; Optical crosstalk; Optical receivers; Optical transmitters; Performance analysis; Pulse modulation; Stimulated emission; BER; FWM; OCDMA;
Conference_Titel :
Microwave Conference, 2008 China-Japan Joint
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-3821-1
DOI :
10.1109/CJMW.2008.4772503
