The technology of OCDMA has many advantages in access network.
光码分多址（OCDMA）技术主要应用在接入网中。
So the information capacity of the asynchronous OCDMA is gotten.
由此推证了异步OCDMA系统在单用户检测下的理论信息容量限。
This article researches the all-optical network base on OCDMA technology.
对基于光纤CD MA (OCDMA)技术的全光网进行了研究。
It is important to select spreading spectrum code for OCDMA communication.
对于OCD MA通信，扩频码的选择非常重要。
It investigates the technology of optical CDMA (OCDMA) using in all optical networks.
对基于光纤码分多址(OCDMA)技术的全光网进行了研究。
The information eavesdropping techniques of spectral phase-coded OCDMA system were investigated.
针对光谱相位编码光码分多址系统（OCDMA）的信息侦听技术进行了研究。
The normal single mode optical fiber is not available for FH OCDMA system without any compensation scheme.
群速度失配造成的光脉冲位置偏移，在没有补偿措施的情况下，普通单模光纤不适于现有的FH -OCDMA系统。
Excellent performance of the OCDMA system user address codes is an important prerequisite for practical use.
用户地址码的优良性能是OCDMA系统实用化的重要前提。
The Optical Code Division Multiple Access (OCDMA) technology can provide broad bandwidth and multiple accesses.
光码分多址（OCDMA）技术可提供宽带宽和实现多址。
Then, the performance of BCH coded FFH OCDMA system was analyzed, and was compared with uncoded FFH OCDMA system.
论述了BCH信道编码对FFH-OCDMA系统性能的影响，并将它和未编码的FFH- OCDMA系统进行了比较。
The analysis of impact on error of code position for OCDMA system, Gained the formula of BER of system under the case.
分析了在光功率，码位误差，码长，单极码和双极码情况下对OCDMA系统性能的影响。
Analysis result shows that this scheme can improve the BER performance, and thus enhance the system capacity of FFH OCDMA.
结果表明。该方案能有效地改善FFHOCDMA系统误码率的性能，可增加系统的容量。
OTDM technologies are introduced. A OCDMA/WDM networks topology is proposed, and basic principle of hybrid networks is analyzed.
提出一种OCDMA/WDM网络拓扑结构，并分析了这两种复用技术混合组网的基本原理。
The scheme of hybrid WDM and optical code division multiple access (OCDMA) system is proposed and its blocking rate is analysed.
提出混合波分复用(WDM)和光码分多址(OCDMA)网络结构方案，并建立数学模型讨论该网络结构的阻塞率。
Then based on the optical code-cylinder, the analytical theory of maximum system capacity of 2-D OCDMA system is established in detail.
并根据光码柱面，建立了在光码集本身导出二维码码字容量的分析理论。
Analysis result shows that RS code can improve the BER performance of OCDMA greatly, which will increase the reliability of OCDMA system.
分析结果表明，RS纠错码能有效改善OCDMA系统的误码率性能，提高了OCDMA系统的可靠性。
Phase encode spreading optical code division multiplex access (OCDMA) communication system is one of the research focuses in recent years.
相位编码扩谱光码分多址（OCDMA）通信系统是近年来OCDMA研究的热点之一。
Total users and spectral efficiency are studied under different proportion of total available bandwidth that is allocated to OCDMA and WDMA.
当可用带宽在WDMA与OCDMA之间不同的分配情况下，研究了该混合系统的总用户数和频谱效率。
At last it discusses some problems in realization of AON using by OCDMA to have a conclusion that the OCDMA technique has an extensive using...
探讨了全光网具体实现中存在的一些问题，得出结论OCD MA技术是实现全光网传输的较好选择。
Based on coherent optical phase encoding OCDMA techniques rely on phase changes optical signals, using pseudo-random sequence for encoding and decoding.
基于相干光的相位编码OCD MA技术依靠光信号的相位变化，利用伪随机序列来编解码。
The numerical results show that the asynchronous OCDMA system assuming the proposed code reveal excellent performance in the presence of double hard limiters.
数值计算结果表明，异步OCDMA系统，假设所提出的代码显示优异的性能在双硬限幅器的存在。
The simulation results show that the OCDMA system using the code converters has better BER performance than that without code converters. The data can be successfully transmitted.
采用这种码字转换方法，系统误码率性能远远高于没有进行码字转换的系统性能。
The effects of pulse shape on the chip-asynchronous coherent time-spreading OCDMA system performances are analyzed by the aperiodic cross-correlation function of up-sampled sequence.
采用超抽样序列的非周期互相关函数值，研究了脉冲形状对切普异步时域相位光码分多址（OCDMA）系统性能的影响。
Since its competitive technological advantage and bright market prospect, OCDMA technology has become one of the potential candidates for future all optical high transmission network.
它结合了两种技术的特点，具有较强的技术优势和广阔的发展前景，是未来高速光通信的备选方案之一。
The results of simulation show that dispersion seriously reduces the peak power and sample energy on the FFH OCDMA system. Hence, bit error rate(BER) of system is increased by dispersion.
结果表明，在FFH-OCDMA系统中，光纤色散导致解码自相关光脉冲峰值功率和光脉冲取样能量的降低，进而导致系统误码率（BER ）的增加。
Therefore, the real multi-user random access can be implemented by building a LAN based on the OCDMA technology and employing the intelligent multi-level gateway to expand the system capacity.
基于OCD MA技术组建局域网络，采用智能多级网关对系统进行扩容，能实现多用户真正的随机接入。
In wireless optical code multiple access (W-OCDMA) network, Media access Control (MAC) is a key issue, which determines network performance, bandwidth efficiency, complexity and cost of terminal.
无线光码分多址(W -OCDMA)接入网中，数据链路层的媒质接入控制技术(MAC)至关重要，它直接影响网络的性能、带宽利用效率、终端设备的复杂度和成本。
Sensitivity of system performance to extinction ratio degradation and its evaluation were studied. Based on these analyses, the sensitivity of FFH-OCDMA system was compared to that of DS-OCDMA system.
讨论了系统性能对消光比劣化的敏感程度问题，并给出了评价方法，并据此对跳频系统和直接序列系统进行了比较。
Sensitivity of system performance to extinction ratio degradation and its evaluation were studied. Based on these analyses, the sensitivity of FFH-OCDMA system was compared to that of DS-OCDMA system.
讨论了系统性能对消光比劣化的敏感程度问题，并给出了评价方法，并据此对跳频系统和直接序列系统进行了比较。
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