TDM-CDMA PON系统结构及新型码字同步技术
首发时间:2011-12-06
摘要:无源光网络(PON)技术由于其低成本、高带宽、多业务接入等优点,成为业界公认的接入网解决方案。目前广泛应用的TDMA-PON网络体系安全性较差、系统容量小而无法成为下一代光接入网主导。由此本课题组提出了一种基于电域高速CDMA编解码的TDM-CDMA 新型PON系统。此系统在下行方向使用TDM技术,在上行方向采用CDMA技术,因而具有CDMA的抗干扰性强,保密性好,安全性高等诸多优势。本文描述了TDM-CDMA PON的系统结构,并对TDM-CDMA PON中的新型码字同步技术进行了详细的阐述。
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The system architecture of TDM-CDMA PON and the new Code Synchronization technology
Abstract:With low cost,wide bandwidth and multi-service capability, PON(Passive Optical Network)has become a widely accepted solution for access network. The TDMA-PON such as EPON is in widespread use. But with its poor network security and small system capacity, TDMA-PON cannot dominate in the next generation optical access network. To this situation, our research group put forward a TDM-CDMA PON system, which is based on high speed electrical CDMA technology. TDM-CDMA PON employs TDM technology in the down direction and uses CDMA technology in the up direction. Hence TDM-CDMA PON has strong anti-interference capability,good secrecy and high security. The system architecture of TDM-CDMA PON is outlined, and the new code synchronization is explained in detail.
Keywords: PON TDM-CDMA code synchronization
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