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Synchronous fiber-optic CDMA using hard-limiter and BCH codes

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2 Author(s)
Jyh-Horng Wu ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Jingshown Wu

In this paper, synchronons code division multiple access (S/CDMA) for fiber-optic local area networks is considered. The performance of the fiber-optic S/CDMA network with negligible thermal and shot noises is interference limited. Here we derive the bit error rate of the S/CDMA system as a function of code length and number of active users, and the performance characteristics are also discussed. Furthermore, we analyze the performance of the fiber-optic S/CDMA system with an ideal optical hard-limiter, and the error probability with error control coding is also derived. In addition, the optimization between the S/CDMA and BCH codes of a constant bandwidth system is presented. The results show that by using an ideal hard-limiter in conjunction with BCH codes in this system, the influence of interference arising from other users can be greatly reduced, and the number of active users can also be increased significantly

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Lightwave Technology, Journal of  (Volume:13 ,  Issue: 6 )