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首页> 外文会议>Optical Transmission, Switching, and Subsystems IV pt.1 >The Impact of Fiber Chromatic Dispersion of a Wavelength Hopping Time Spreading Optical CDMA System
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The Impact of Fiber Chromatic Dispersion of a Wavelength Hopping Time Spreading Optical CDMA System

机译：波长跳跃时间扩展光CDMA系统的光纤色散影响

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摘要

A theoretical analysis is presented to evaluate the impact of fiber chromatic dispersion on the bit error rate (BER) performance of a two dimensional wavelength hopping time spreading optical CDMA system. A bipolar-unipolar coding scheme has been considered for 7 chip m-sequence and 31 and 127 chip Gold sequence considering a standard single mode fiber. The numerical results show that there is an order of magnitude increase in BER due to the effect of dispersion. For 100 simultaneous users, at a received power of-4dbm, average BER occurs at about 10~(-6) and 10~(-12) with and without chromatic dispersion respectively for 7-chip m-sequence at a chip rate of 10 Gchip/sec for a fiber length of 245.05 km, with dispersion coefficient of 16 ps/km-nm. For 31-chip Gold sequence, the corresponding average BER is of the order of 10~(-17) and 10~(-21) with and without dispersion respectively. It is further noticed that for 10 simultaneous users, the system operating at a chip rate of 10Gchip/sec, suffers a power penalty of 9.15 dB for 7-chip m-sequence and 1dB for 31-chip Gold sequence at a BER of 10~(-9).
机译：进行了理论分析，以评估光纤色散对二维波长跳跃时间扩展光学CDMA系统的误码率（BER）性能的影响。考虑到标准单模光纤，已经针对7片m序列，31片和127片Gold序列考虑了双极-单极编码方案。数值结果表明，由于色散的影响，BER有一个数量级的增加。对于100个同时使用的用户，在4dbm的接收功率下，对于7片m序列，码片速率为10时，平均BER分别出现在约10〜（-6）和10〜（-12），有和没有色散。 Gchip / sec，光纤长度为245.05 km，色散系数为16 ps / km-nm。对于31芯片的Gold序列，相应的平均BER分别为10〜（-17）和10〜（-21），有色散和无色散。还需要注意的是，对于10个同时用户，以10Gchip / sec的码片速率运行的系统在BER为10时，对7片m序列的功率损失为9.15 dB，对于31片Gold序列的功率损失为1dB。 （-9）。

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