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频谱相位编码OCDMA系统的误码特性研究
引用本文:张海滨,黄培中,宋文涛,李荣玉,李毓麟. 频谱相位编码OCDMA系统的误码特性研究[J]. 电子学报, 2003, 31(7): 1012-1014
作者姓名:张海滨  黄培中  宋文涛  李荣玉  李毓麟
作者单位:上海交通大学电子工程系,上海,200030;区域光纤通信网与新型光通信系统国家重点实验室,上海,200030;上海交通大学电子工程系,上海,200030;区域光纤通信网与新型光通信系统国家重点实验室,上海,200030;上海交通大学电子工程系,上海,200030;区域光纤通信网与新型光通信系统国家重点实验室,上海,200030;上海交通大学电子工程系,上海,200030;区域光纤通信网与新型光通信系统国家重点实验室,上海,200030;上海交通大学电子工程系,上海,200030;区域光纤通信网与新型光通信系统国家重点实验室,上海,200030
基金项目:国家自然科学基金 (No 60 2 72 0 80 ),上海市科技发展基金 (No 0 0JC1 4 0 54)
摘    要:本文利用中心极限定理和雅可比变换的方法,对频谱相位编码(spectral phase encoding)OCDMA系统中多址干扰和解码器输出信号的统计特性进行了研究,并据此推导出多址干扰和背景噪声共同作用下系统新的误码率公式.本文还分析了系统性能与判决门限选择的关系,数值结果表明:系统最佳的判决门限Rth=√P0/2,在此判决门限的条件下,系统的性能满足高速全光通信的需要.

关 键 词:光码分多址  频谱相位编码  多址干扰  误码率
文章编号:0372-2112(2003)07-1012-03

Bit Error Rate of Spectral Phase Encoding OCDMA Systems
ZHANG Hai-bin ,,HUANG Pei-zhong ,,SONG Wen-tao ,,LI Rong-yu ,,LI Yu-lin . Bit Error Rate of Spectral Phase Encoding OCDMA Systems[J]. Acta Electronica Sinica, 2003, 31(7): 1012-1014
Authors:ZHANG Hai-bin     HUANG Pei-zhong     SONG Wen-tao     LI Rong-yu     LI Yu-lin
Affiliation:ZHANG Hai-bin 1,2,HUANG Pei-zhong 1,2,SONG Wen-tao 1,2,LI Rong-yu 1,2,LI Yu-lin 1,2
Abstract:Using the central limit theorem and the Jacobian transform method,this paper studies the statistical characteristics of multiple-access interference (MAI) in spectral phase encoding optical code-division multiple access (OCDMA) systems.The statistical characteristics of the outputs of the decoders are also studied,which are then utilized to derive the bit error rate (BER) expression with the influence of both MAI and background noise.This paper also analyzes the relationship of the system performance with the decision threshold selection.The results show that the optimal decision threshold is R th=P 0/2,with which the BER is almost minimized,no matter what the user number and the signal-to-noise ratio are.With the optimal decision threshold,the BERs are calculated and analyzed for different user numbers and different signal-to-noise ratios.The numerical results reveal that the system performance can meet the need of high-speed all-optical communications.
Keywords:optical code division multiple access(OCDMA)  spectral phase encoding  multiple-access interference(MAI)  BER
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