用FPGA实现ATM信元的字头处理

ATM Cell Header Processor IMplemented by FPGA

本文探讨了采用ＦＰＧＡＸ３０００系列芯片实现独立于承载码流结构的ＡＴＭ信元字头处理器的可能性，针对ＦＰＧＡ处理速度相对低于可能的承载码流速率的问题，着重研究了字头ＨＥＣ字段生成、扰码、信元定界、解扰等过程的并行处理算法。

The possibility to use FPGA X3000 chip series to realize ATM cell header processor,which isindependent to the structure of the transport stream of ATM cells,is studied in this paper.To overcome therelative olwer processing speed of the FPGA compared with the rate of the transport strearm,the parallel al-gorithms for generating HEC field,scrambling and descrambing of ATM cell payload and the cell delineations are emphasized in this paper.