北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2008, Vol. 31 ›› Issue (3): 133-136.doi: 10.13190/jbupt.200803.133.288

• 研究报告 • 上一篇    

利用小波变换进行MC-MPSK信号载频盲估计

赵福才1, 胡以华1, 张 立2   

  1. 1. 电子工程学院, 合肥 230037; 2. 中国人民解放军71217部队53分队, 莱阳 265200
  • 收稿日期:2007-10-26 修回日期:1900-01-01 出版日期:2008-06-28 发布日期:2008-06-28
  • 通讯作者: 赵福才

Carrier Frequency Blind Estimation of MC-MPSK Signal Using Wavelet Transform

ZHAO Fu-cai1, HU Yi-hua1, ZHANG Li2   

  1. 1. Electronic Engineering Institute of PLA, Anhui Hefei 230037, China; 2. No.71217 of PLA, Shandong 265200 China
  • Received:2007-10-26 Revised:1900-01-01 Online:2008-06-28 Published:2008-06-28
  • Contact: ZHAO Fu-cai

摘要:

小波变换是在强噪声背景下进行信号时频分析的有效方法.利用小波变换的方法,使用Haar小波变换对多载波多进制相移键控(MC-MPSK)信号中心频率进行了估计.给出了计算机仿真的结果,将这种算法的估算结果与改进的克拉美-罗限(MCRB)进行了比较.结果表明,在没有先验知识的情况下,利用Haar小波变换方法可以精确的估计MC-MPSK信号中心频率,而且估计性能受相位噪声地影响不大.

关键词: 多载波多进制相移键控信号, 载频估计, 小波变换, 相位噪声

Abstract:

Methods of wavelet transform are effective methods of time-frequency analysis under the background of strong noise. A method to estimate the frequency of multi-carrier M-ary Phase-Shift Keying (MC-PSK) signals is showed, it uses Haar’s wavelet transform. Simulation is used. The algorithm is compared to modified carmer-rao bound(MCRB), it shows that the methods of wavelet transform can accurately estimate the carrier frequency of MC-PSK signals without prior knowledge. The estimation performance is effected by phase noise very slightly.

Key words: multi-carrier m-ary phase-shift keying signals, frequency estimation, wavelet transform, phase noise

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