【摘要】 ATM PON由于价格低、性能好、宽带化和灵活接入等优点 ,对宽带接入网的发展具有重要意义 .文中介绍了集成化的 APON产品的一个重要组成部分—APON TC子层芯片 (包括 OLT和 ONU TC子层芯片 )的结构设计框图 ,并对各个功能模块进行了详细的阐述 .另外 ,文中还介绍了该组芯片集成化设计的关键性技术 ,包括并行扰码、并行HEC产生 /校验、分布式解扰码和并行信元定界等技术 .各种并行技术对降低电路工作速度和功耗、提高电路稳定性有着重要的作用 .更多还原

【Abstract】 ATM PON is important to the development of broadband access networks due to the advantages such as low cost, great performances, flexible access and so on. In this paper, the frame designs of ATM PON TC layer chips and some techniques of the integrated designs have been presented in detail. The TC layer chips include the OLT TC layer chip and the ONU TC layer chip. The paper has also presented the key techniques which can drop the work speed and power of the integrated circuits, such as the parallel scrambling, the parallel HEC generating and checking, the parallel cell delimiting and the distributed sample descrambling.更多还原