Optical orthogonal code acquisition in fiber-optic CDMA systems via the simple serial-search method

被引:35
作者
Keshavarzian, A [1 ]
Salehi, JA
机构
[1] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA
[2] Sharif Univ Technol, Dept Elect Engn, Tehran, Iran
关键词
code acquisition and synchronization; optical CDMA; optical orthogonal codes; serial-search method;
D O I
10.1109/26.990909
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper, we analyze, for the first time, the performance of a serial-search algorithm for optical code-division multiple access (CDMA) systems using optical orthogonal codes (OOC). For our analysis, we use advance photon-counting methods and we consider the effect of shot noise and dark current and multi-access interference (MAI). We introduce a new method for modeling the effect of MAI, then we use two approaches to consider this effect on the performance of the synchronization system. For the first approach, we consider the average effect of interference in our analysis, while for the second approach two specific forms of interference are taken into account where one form represents a heavily localized interference pattern and the other shows a uniformly distributed one. The effects of different parameters of the system including system threshold, number of active users in the network, and mean number of photons in each optical pulse on the performance of the synchronization system are evaluated and discussed.
引用
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页码:473 / 483
页数:11
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