A new full_digital non_coherent delay_locked loop (NC_DLL) with a binary digital phase detector and a digital sequential filter is proposed for PN code tracking in direct_sequence spread_spectrum systems.
提出一种新颖的全数字PN码跟踪,该跟踪环采用符号判决电路和数字序贯滤波器取代经典的环路滤波器来提高衰落环境下的跟踪性能。
It uses dynamic hashing technique to construct a linear hashing table as together with a character mapping function designed to optimize the whole structure of HIM and improve the performance of file systems.
在分析常用文件系统索引结构的基础上,提出了一个文件系统动态存储和索引结构,层次散列索引模型(HierarchicalHashingIndexModel,HIM)·HIM应用动态散列技术,以线性散列表(LinearHashingTable)为基本结构,并辅以专门设计的字符序列映射函数,整体上优化了HIM结构,提高了文件系统的索引性能·HIM是文件系统索引结构的抽象模型,可应用于任何文件系统的设计中