摘要
利用时频聚集性较好的高斯函数作为标准信号,分析了短时傅里叶变换、小波变换、谱图、尺度图、Wigner-Ville分布的分辨率以及交叉项对分辨率的影响,并对它们的分辨率进行了比较;为了进行时间-尺度分布与时频分布的比较,提出了改进小波变换;在分辨率比较中,给出了几种典型情况的模拟结果。
Using the Gaussian function which has the better time-frequency aggregative performance as the standard signal,this paper analyzes the influence of the resolution of short-time Fourier transform,wavelet transform,spectrogram,scale map and the Wigner-Ville distribution cross-term on the resolution,and compares their resolution;in order to perform the comparison between the time-scale distribution and time-frequency distribution,puts forward a modified wavelet transform;gives the simulation results of several typical instances during the resolution comparison.
出处
《舰船电子对抗》
2011年第1期26-29,共4页
Shipboard Electronic Countermeasure
