基于连续小波变换的相位编码信号定时信息提取研究

Research on phase coded signal timing information extraction based on Haar wavelet transform

分析了一维小波变换的基础原理，并利用该原理进一步分析了相位跳变点时刻小波变换提取相位编码信号的可能性，指出小波变换系数模的平方极大值的相位跳变点，并根据此特征有效提取相位跳变点时刻的信息。在此基础上，分析了残留载频对算法性能的影响以及小波尺度的选取策略。并对研究的结论进行了仿真测试，验证了在不同信噪比条件下，算法的性能以及正确性。为现代电子战对抗雷达信号识别提供借鉴意义，为今后深入开展信号识别研究提供了理论依据。

This paper analyzes the basic principle of one-dimensional wavelet transform, and further analysis of the phase jump point of wavelet transform to extract the possibility of phase encoding signal based on the principle, pointed out that the phase wavelet transform modulus maxima of the square of the jump point, and according to the characteristics of effective extraction phase jump point information. On this basis, the influence of residual carrier frequency on the performance of the algorithm and the selection strategy of wavelet scale are analyzed. Finally, the simulation results are given to verify the performance and correctness of the proposed algorithm under different signal- to-noise ratio conditions. It can provide reference for radar signal recognition in modern EW, and provide a theoretical basis for further research on signal recognition,