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A synchronous fiber-optic CDMA system using adaptive optical hardlimiter

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2 Author(s)
Che-Li Lin ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Jingshown Wu

In this paper, we propose a new synchronous fiber-optic code-division multiple-access (CDMA) system using adaptive optical hardlimiter and modified prime sequence code. At the receiver, the energy in one bit duration is estimated and used to adjust the threshold value of the adaptive optical hardlimiter which is placed after the optical correlator. The bit error probability of the system is analyzed with the consideration of thermal noise, shot noise, and dark current noise of the photodetector. The results show that this system can support a larger number of simultaneous users than other systems also using modified prime sequence code under the same bit error probability constraint

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Lightwave Technology, Journal of  (Volume:16 ,  Issue: 8 )