摘要
首先引入时频分析的概念,介绍了短时傅里叶变换、Wigner—Ville分布和连续小波变换的数学表示和性质.其次基于经典检测理论,讨论并比较了它们在高斯白噪声背景下对确知信号的检测问题.最后对它们在自导信号检测应用中的有关问题进行了分析,并指出了需进一步研究的方向.
First, the conception of time-frequency analysis is explained, and the mathematical expression and corresponding properties of short-time Fourier transform, Wigner-Ville distribution and continuous wavelet transform are introduced. Secondly, the application of Wigner -Ville distribution and continuous wavelet transform on detecting known signal under white Gaussian noise environment is presented on basis of classical signal detection theory. Finally, problems of their application to torpedo homing head are discussed.
基金
海军青年科技基金资助项目
关键词
信号检测
鱼雷
自导信号
时频分析方法
Signal detection
Short-time Fourier transform
Time-frequency distribution
Wigner-Ville distribution
Continuous wavelet transform
Torpedo homing head
