Title :
Power limitations due to four wave mixing in a direct sequence optical CDMA transmission system
Author :
Uddin, Md Forkan ; Majumber, S.P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Bangladesh Univ. of Eng. & Technol., Dhaka, Bangladesh
Abstract :
A theoretical analysis is presented to evaluate the bit error rate (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 chips per 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 -14 dBm for 10 users and -21 dBm 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; code division multiplexing; error statistics; multiwave mixing; optical communication; BER performance; bit error rate; direct sequence optical code division multiple access; dispersion shifted fiber; four wave mixing; gold sequence; optical receivers; Bit error rate; Four-wave mixing; Multiaccess communication; Optical crosstalk; Optical mixing; Optical receivers; Optical transmitters; Performance analysis; Power engineering and energy; Stimulated emission; bit error rate; dispersion shifted fiber; four wave mixing; multiple access interference; optical CDMA; optical receivers;
Conference_Titel :
Networks, 2005. Jointly held with the 2005 IEEE 7th Malaysia International Conference on Communication., 2005 13th IEEE International Conference on
Print_ISBN :
1-4244-0000-7
DOI :
10.1109/ICON.2005.1635489
