Possessing the property of time - frequency localization and the ability of unsteady signal processing , wavelet analysis has become the most conspicuous one in the new diagnosis methods in recent years 小波分析具有良好的时频局部化特性，是非平稳信号处理的有力工具，也是近年来涌现的新诊断方法中最受关注的一种。
This paper carries out a thorough research on signal detection and parameter estimation of moving target under the co - jamming of additive and multiple noise , with the tools of cyclostationary signal processing 本文以循环平稳信号处理作为主要工具，详细研究了加性和乘性噪声联合干扰下的雷达运动目标信号的检测和参数估计问题。
The nonstationary vibration sources that are mutually independent can be effectively identified by using the nonstationary blind source separation method from the multi - channel fault vibration signals 对于多通道的设备故障振动信号，应用非平稳信号的盲源分离算法，可以有效地提取各自独立的非平稳振动源，从而可以准确地进行机械故障诊断。
In disposal of signal process , especially in disposal of unsteady signal process its ability in analyzing the transient signal of neighboring any time is very strong . and then we put up experiments for grinding machinery on the spot 在信号处理过程中，尤其是对非平稳信号的处理中的任意时刻附近的瞬变信号的分析，都具有很强的分辨能力。
In this paper , the self - adaptive filter , the wavelet transform and the fourier transform are used to detect the stationary and the non - stationary signal of underwater sound in anisotropic noise field 本文以各向异性噪声场为例，分别对声矢量信号中的声压、振速探讨应用自适应滤波、小波变换、短时傅里叶变换检测水声平稳和非平稳信号的应用效果。
Considering that the acoustic signal received are subject to environmental , climatic and other factors and thus assumes the characters of non - stable signals , this paper uses the wavelet analysis to reduce noise and to extract charactrzations 同时考虑到接收到的声信号容易受到环境、气候的影响而具有非平稳信号的特点，因而采用了小波变换的去噪和特征提取方法。
Fourier transform method use high order frequency to analyse and imitate nonlinear and non - stationary data . emd method based on local characteristic time scale of the data is more fit to analyse nonlinear and non - stationary data than fourier transform method Emd基于信号的局部时间特征尺度分析原信号，克服了傅里叶变换用高次谐波频率分量拟合非线性、非平稳信号的缺点。
The algorithm and application to unstationary signal analysis are distussed with wavelet transform in order to overcome defect of fourier transform only applied to stationary signal analysis on frequency domain . some comparisons are made between them 论文针对传统fourier变换只能在频域上对稳定信号进行分析的不足，探讨了利用小波变换进行非平稳信号分析的算法和应用，并在两者之间做了比较。
Linear frequency modulated ( lfm ) signals as the most popular pulse compression signal are a typical kind of time - varying , nonstationary signals , so applying the wigner - ville distribution into lfm signals has more advantages than conventional methods 雷达脉冲压缩技术中所使用的线性调频信号是一类典型的时变非平稳信号，采用时频分析的研究方法处理线性调频信号有着传统方法无法比拟的优点。
Being the base of vector spectrum , fundamental vector spectrum and vector power spectrum are studied detailedly in this paper the work of short time vector spectrum is also involved in this paper what ' s more , this paper also dealt with different degree of information fusion 本文中仅对处于基础地位的矢量谱和矢功率谱进行详细的理论及应用研究，并有代表性的探讨了非平稳信号的短时矢谱分析。
