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《南京理工大学学报》（自然科学版）[ISSN:1005-9830/CN:32-1397/N]

卷:

期数:

1998年04期

页码:

37-40

栏目:

出版日期:

1998-08-30

文章信息/Info

Title:

A Simple and Efficient Method for Removing Phase Wrap

作者:

蒋立平; 郭延芬¹

( 南京理工大学电子工程与光电技术学院, 南京210094)
( ¹ 东南大学无线电工程系, 南京210018)

Author(s):

Jiang Liping Guo Yanfen ①

School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing210094
¹ Department o f Radio Engineering , South-East Univer sity, NanJing 210018

关键词:

差分;  共轭;  时延;  互功率谱;  相位卷绕

Keywords:

diff erence;  conjugate;  t ime delay;  cros s-spectrum;  phase wrap

分类号:

TN911

摘要:

相位信息的提取在信号处理中是一个重要方面，然而在相位信息提取中，常存在相位卷绕问题。该文介绍了一种简单而有效的去相位卷绕的方法，该方法采用差分原理，用共轭运算实现。该方法适用于诸如相位法时延估计、信号中瞬时频率的估计等直接应用相位信息的问题中。配合简单的多段平均和稳健处理，就可去除很强的噪声和干扰，在信噪比为０ｄＢ甚至更低时也能可靠工作。

Abstract:

T he ext racion of phase inf ormat ion of the s ig nal dist orted by noise is an important aspect of signal process ing. However, the accurat e ex timat ion of the phase is diff icult because of phase w rap. T his paper propose a s imple and ef ficient approach t o remove the phase wr ap. Such approach whose primar y idea is diff erent principle and conjugate operat ions is useful in the time-delay es timat ion using phase informat ion and the trans ient fr equency es t imation of signal .U sing this appr oach, along with multipl e-segment s averag e and robust proces sing, the eff ect of noise and int erference at s ignal-noise rat io 0 db o r low er can be eff iciently mitigat e. Ex periment result s are presented f or the wideband noise model.

备注/Memo

备注/Memo:

蒋立平　男　43岁　副教授

常用功能

更新日期/Last Update: 2013-03-29