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利用小波脊线法可以实现相位编码信号脉内特征的提取,但低信噪比下噪声幅度将淹没小波变换的尖峰,误差较大,严重影响识别效果.为改善低信噪比下相位编码信号脉内特征提取的准确性,提出一种基于小波分析去噪和小波脊线法相结合的改进算法,首先通过小波分析对相位编码信号进行去噪,改善信噪比,在此基础上再进行其脉内特征的提取.仿真结果证明该方法有效,具有一定的参考价值.
Wavelet ridge method can be used to extract the intra-pulse feature of phase-coded signal, but the noise amplitude at low signal-to-noise ratio will submerge the spikes of wavelet transform with large error, which will seriously affect the recognition performance.In order to improve the phase-coded signal In this paper, an improved algorithm based on wavelet analysis and wavelet ridge method is proposed. Firstly, the phase-coded signal is denoised and the signal-to-noise ratio is improved by wavelet analysis. Based on this, The extraction of intra-pulse features.The simulation results show that the method is effective and has certain reference value.