Reductions of multiple-access and optical beat interference with fiber-grating OCDMA balanced decoder

Jen Fa Huang, Yao Tang Chang, Chuen Ching Wang

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

An optical spectral coding technique in fiber-grating-based optical code-division multiple-access (OCDMA) system has been investigated in our previous work. In this thesis, the same architecture is set up to investigate the reduction of multiple-access interference caused by the overlapping wavelength from undesired users. Furthermore, the reduction of optical beat interference (OBI) induced by those adjacent grating chips is examined. The reduction of multiple access interference (MAI) and OBI induced by those adjacent grating chips. FBG written as M-sequence and Walsh codes is proposed for such MAI and OBI cancellation in spectrally balanced photo-detectors. Theoretically, M-sequence and Walsh codes are characterized by nearly the same number of "on" chips (i.e., logic "1" chips) and "off" chips (i.e., logic "0" chips). It is seen that the differential decoding scheme characterizes a better performance on eliminating the MAI and OBI problem by mutual cancellation in reflected and transmitted branches of wavelength chips. Furthermore, we propose that the wavelength interleaving allocation method can result in a guard band to suppress OBI. It is shown that SIR has 13 dB improvement with the proposed scheme.

原文English
主出版物標題Proceedings - 17th International Conference on Advanced Information Networking and Applications, AINA 2003
發行者Institute of Electrical and Electronics Engineers Inc.
頁面168-171
頁數4
ISBN(電子)0769519067
DOIs
出版狀態Published - 2003 一月 1
事件17th International Conference on Advanced Information Networking and Applications, AINA 2003 - Xi'an, China
持續時間: 2003 三月 272003 三月 29

出版系列

名字Proceedings - International Conference on Advanced Information Networking and Applications, AINA
2003-January
ISSN(列印)1550-445X

Other

Other17th International Conference on Advanced Information Networking and Applications, AINA 2003
國家/地區China
城市Xi'an
期間03-03-2703-03-29

All Science Journal Classification (ASJC) codes

  • 工程 (全部)

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