摘要
在基于IEEE802.11a标准的无线局域网的突发系统中,要求快速、精确地完成定时同步。本文分析了基于短训练序列延时自相关的粗同步算法和基于长训练序列与本地PN序列互相关的精同步算法,给出了定时同步算法具体的用FPGA实现的设计方案,采用状态机、流水线等设计方法使系统的资源和运算速度得到优化。该设计便于工程应用。
In the burst IEEE 802.11a WLANs, fast and precise time synchronization is required. The coarse timing synchronization algorithm based on auto-correlation and the fine timing synchronization scheme based on cross-correlation between long sequence and local PN sequence are used in the article , and a scheme of hardware implementation based on FPGA for timing synchronization algorithms is given. It optimizes the system in the resources and the speed of operation by using the state machine and pipeline methods, and the design is convenient for engineering applications.
出处
《计算机工程与科学》
CSCD
北大核心
2009年第7期117-119,共3页
Computer Engineering & Science
关键词
OFDM
定时同步
自相关
互相关
FPGA
OFDM
time synchronization
auto-correlation
cross-correlation
FPGA
