一种新的数字调制信号符号率估计和同步算法  

A New Method of Baud Rate Estimation and Symbol Synchronization for Digital Modulated Signals

作　　者：石明军[1] 邓名桂[1] 肖立民[1] 周世东[1] 姚彦[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《通信技术》2009年第1期30-32,35,共4页Communications Technology

摘　　要：在非合作通信中,符号率估计和符号同步是实现数字调制信号正确解调的关键问题之一。针对这一问题,文中在分析现有符号率估计和符号同步算法优缺点的基础上,提出了一种新的基于Haar小波变换的数字调制信号符号率估计和符号同步算法。通过引入多同步参考点和同步位置修正技术,使得该算法具有更高的精度和抗噪声性能。数值仿真验证了该算法与传统算法相比的优越性。In non-cooperative communications, baud rate estimation and symbol synchronization are important issues in realizing demodulation of digital modulated signals. To solve these problems, an analysis on current algorithms of baud rate estimation and symbol synchronization is given. Then a new method of baud rate estimation and symbol synchronization based on Haar wavelet transform （HWT） is proposed for digital modulated signals. By introducing multiple synchronizing reference points and synchronizing reference points correcting techniques, higher accuracy and anti-noise ability is obtained. The simulation results show that the proposed method outperforms the others.

关 键 词：小波变换 符号率估计 符号同步 

分 类 号：TN919[电子电信—通信与信息系统]