Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (7): 1564-1567.

• 电子技术 • 上一篇    下一篇

IR-UWB通信系统的准自适应频率同步算法

尹华锐, 李亚麟, 符权, 王卫东   

  1. 中国科技大学电子工程与信息科学系, 安徽, 合肥, 230027
  • 收稿日期:2008-04-17 修回日期:2008-07-23 出版日期:2009-07-20 发布日期:2010-01-03
  • 作者简介:尹华锐(1973- ),男,博士,主要研究方向为短距离无线通信技术.E-mail:yhr@ustc.edu.cn

Quasi-adaptive frequency synchronous method for IR-UWB system

YIN Hua-rui, LI Ya-lin, FU Quan, WANG Wei-dong   

  1. Dept. of Electronic Engineering and Information Science, Univ. of Science & Technology of China, Hefei 230027, China
  • Received:2008-04-17 Revised:2008-07-23 Online:2009-07-20 Published:2010-01-03

摘要: 肪冲无线电超宽带通信(impulse radio-ultra wideband,IR-UWB)通信采用亚纳秒级脉冲承载信息。由于没有传统意义上的载波,其同步方式与传统方式有着很大不同,特别是频率同步面临着很大的挑战。在正交正弦相关接收机基础上提出了一种准自适应频率同步方法。该方法利用接收方本地载波和接收脉冲进行相关得到的矢量进行相差估计,根据估计得到的相位差的象限选择不同的预设步长进行频率调整接收方本地振荡器频率,实现收发双方的频率同步。该方法具有实现简单、同步速度快的优点,并在硬件系统上得到验证,取得了良好的效果。

Abstract: Impulse radio-ultra wideband(IR-UWB) communication systems use sub-nano second pulses for information transmission.Its synchronization method is different from the traditional system especially in frequency synchronization due to carrier-less work mode.A quasi-adaptive frequency synchronous mechanism based on an orthogonal sinusoidal correlation receiver is proposed.Phase gap is estimated by the correlation results from the local oscillator and received pulses,and the receiver changes the frequency of the local oscillator with different preset steps based on the phase quadrant obtained from estimation.Experiments show that quick synchronization and good performance are achieved with this simple algorithm.

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