一种基于光纤布拉格光栅的新型多址干扰消除方案
doi: 10.3724/SP.J.1146.2005.00773
A Novel Kind of Multi-access Interference Cancellation Scheme Based on Fiber Bragg Gratings
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摘要: 在强度调制、直接探测的光码分多址(CDMA)通信系统中，为了有效克服并发用户数之间的多址干扰，提高系统的通信性能，根据组信息，针对由光正交码(OOC)和修正素数码(MPC)构成的扩时/跳频地址码MPC/OOC，提出一种基于光纤布拉格光栅(FBG)的多址干扰消除方案，并详细分析了采用这种多址干扰消除方案的光CDMA通信系统的性能。结果表明，这种基于光纤布拉格光栅的多址干扰消除方案，可以很好地消除光CDMA通信系统中的多址干扰，提高系统的用户数和误码率性能。Abstract: In order to effectively reduce the effects of multi-access interference on the performance of optical code division multiple access (CDMA) communication systems with intensity modulation and direct detection，according to group information, a novel kind of multi-access interference cancellation scheme based on fiber Bragg grating(FBG)used with two dimensional address code MPC/OOC is presented. Considering the effects of multi-access interference, avalanche photodiode (APD) noise, and thermal noise, the performance of proposed optical CDMA communication systems is analyzed in detail. The result shows that this kind of multi-access interference cancellation scheme based on FBG can effectively reduce the influence of multi-access interference. And when received optical power is lager enough, the multi-access interference in two dimensional optical CDMA communication systems with MPC/OOC can be reduced completely.
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