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基于小波变换的码元速率估计优化算法

谭晓衡 张雪静

谭晓衡, 张雪静. 基于小波变换的码元速率估计优化算法. 自动化学报, 2020, 46(8): 1748−1752 doi: 10.16383/j.aas.c170518
引用本文: 谭晓衡, 张雪静. 基于小波变换的码元速率估计优化算法. 自动化学报, 2020, 46(8): 1748−1752 doi: 10.16383/j.aas.c170518
Tan Xiao-Heng, Zhang Xue-Jing. Symbol rate estimation based on wavelet transform. Acta Automatica Sinica, 2020, 46(8): 1748−1752 doi: 10.16383/j.aas.c170518
Citation: Tan Xiao-Heng, Zhang Xue-Jing. Symbol rate estimation based on wavelet transform. Acta Automatica Sinica, 2020, 46(8): 1748−1752 doi: 10.16383/j.aas.c170518

基于小波变换的码元速率估计优化算法

doi: 10.16383/j.aas.c170518
基金项目: 

国家自然科学基金 61571069

中央高校基本科研业务费 106112017CDJQJ168817

详细信息
    作者简介:

    谭晓衡  重庆大学教授.主要研究方向为无线通信, 卫星通信, 移动通信. E-mail: txh@cqu.edu.cn

    通讯作者:

    张雪静  重庆大学硕士研究生.主要研究方向为通信信号处理.本文通信作者. E-mail: gslzcqzxj@163.com

Symbol Rate Estimation Based on Wavelet Transform

Funds: 

National Natural Science Foundation of China 61571069

Fundamental Research Funds for the Central Universities 106112017CDJQJ168817

More Information
    Author Bio:

    TAN Xiao-Heng    Professor at Chongqing University. His research interest covers wireless communication, satellite communication, mobile communication

    Corresponding author: ZHANG Xue-Jing    Master student at Chongqing University. Her main research interest is communication signal processing. Corresponding author of this paper
  • 摘要: 针对低信噪比下MPSK (M-ary phase shift keying)信号的码元速率估计问题, 提出一种优化算法.该算法无需先验知识, 通过Hilbert变换提取瞬时相位基带序列, 经多尺度小波变换, 对每个尺度下的小波系数的模值的平方进行叠加, 对叠加后的结果再进行功率谱计算, 在码元速率整数倍处有离散谱线, 估计正确率在信噪比大于1 dB时大于90 %.
    Recommended by Associate Editor FU Jun
    1)  本文责任编委 付俊
  • 图  1  子段的窗函数

    Fig.  1  Window function of segment

    图  2  2PSK信号码元速率估计

    Fig.  2  Symbol rate estimation for 2PSK signal

    图  3  不同信噪比下MPSK信号码元速率估计正确率

    Fig.  3  Correct rate of symbol rate estimation for MPSK signals in different SNR

    图  4  两种不同算法的码元速率估计正确率比较

    Fig.  4  Comparison of correct rate of symbol rate estimation for two different algorithms

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出版历程
  • 收稿日期:  2017-09-11
  • 录用日期:  2018-02-26
  • 刊出日期:  2020-08-26

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