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噪声中的瞬态信号检测在雷达信号处理领域占据非常重要的地位。本文利用小波变换的性质，提出一种改进的Ｍｏｒｌｅｔ小波的瞬态信号检测算法。该算法在Ｍｏｒｌｅｔ小波基础上引进了线性变换的调频系数以提高小样本超宽带信号检测的检测精度。对实际实验数据及仿真信号的检测结果表明，该方法在低信噪比小样本情况下，对瞬态超宽带信号具有很好的检测性能。
Transient signal detection in the noise occupies a very important position in the field of radar signal processing. In this paper, by using the nature of wavelet transform, an improved Morlet wavelet transient signal detection algorithm is proposed. Based on the Morlet wavelet, this algorithm introduces linearly-transformed FM to improve the detection accuracy of ultra-wideband signals in small samples. The experimental results of the real experimental data and the simulated signal show that the proposed method has good performance for transient ultra-wideband signals in the presence of small signal-to-noise ratio samples.