摘要
定时系统是超宽带无线电(UWB)接收机的重要组成部分,提供与接收到的极窄脉冲信号同步的精确的时钟信号,以便于接收机正确地检测和恢复传送的信息数据。由于超宽带脉冲信号持续时间是纳秒级,所以对捕获和控制脉冲同步的精度要求极高。所设计的极窄脉冲接收机的同步定时系统,包括基于FPGA的控制模块和可编程延时线等部分,可实现最小调整步距0.25ns,最大同步建立时间5ms,捕获带2kHz,能满足UWB通信系统的要求。
The timing system is an important component of Ultra-wideband(UWB) impulse radio receiver.It provides an accurate clock signal synchronous to the received UWB impulse,so that the information data can be correctly detected and demodulated.Since the UWB impulse signal has a very short duration,the timing system must provide a high accuracy.The timing system introduced in this paper includes the FPGA module and the programmable delay line.It can provide 0.25ns delay step.Synchronous time and other loop parameters are also discussed.It can meet the requirements of the UWB communication system.
出处
《桂林电子工业学院学报》
2004年第1期43-47,共5页
Journal of Guilin Institute of Electronic Technology
