基于信噪比估计和盒维数的调制信号识别

发布时间：2018-05-26 20:38

  本文选题：分形理论 + 调制识别　； 参考：《河北大学学报(自然科学版)》2014年06期

【摘要】：针对数字调相和调频识别问题,提出采用调制信号绝对值的瞬时幅度的盒维数作为多进制数字相位调制(MPSK)和多进制数字频率调制(MFSK)信号类间识别的特征参数,并采用拟合曲线作为判决门限,该方法在保持具有较少的特征参数的同时还增强了对噪声的鲁棒性.在调制信号的类内识别中,分别采用MPSK信号的瞬时相位的盒维数和MFSK信号的瞬时频率的盒维数作为特征参数.仿真结果表明,在信噪比为5dB时,对信号进行完全识别的正确率可以达到90%以上,从而证明了该方法的有效可行性.
[Abstract]:In order to solve the problem of digital phase modulation and frequency modulation recognition, the box dimension of the absolute value of modulation signal is used as the characteristic parameter of MPSKs and MFSKs, which can be recognized by multi-ary digital phase modulation (MPSKK) and multi-ary digital frequency modulation (MFSKK). The fitting curve is used as the decision threshold. This method not only keeps less characteristic parameters, but also enhances the robustness to noise. The box-dimension of instantaneous phase of MPSK signal and the dimension of instantaneous frequency of MFSK signal are used as characteristic parameters in in-class recognition of modulation signal. The simulation results show that when the SNR is 5dB, the correct rate of complete recognition can reach more than 90%, which proves the validity of the method.
【作者单位】： 河北大学电子信息工程学院;
【基金】：河北省自然科学基金资助项目(F2013201170)
【分类号】：TN911.3
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本文编号：1938815