【摘要】 对跳频信号的时频域进行分析是研究跳频通信 ,实现识别、跟踪跳频信号的重要基础。该文首先采用了具有局部分析能力的短时傅立叶变换分析方法对跳频信号在时域和频域上的变化情况进行了MATLAB环境下的仿真。然后 ,利用具有良好的时间 -频率局部化特性的小波变换分析方法对跳频信号进行了MATLAB环境下的仿真分析。结果表明 :跳频信号的小波变换后的时域和频域联合特征可同时兼顾时间和频率这两方面对分辨率的要求。更多还原

【Abstract】 It is crucial to study the features of the frequency hopping signals in both time and frequency domain in order to detect and trace the FH signals. This paper firstly presents a short time Fourier Transform to analyze and simulate the FH signals using a window function and MATLAB. The wavelet transformation method has been then employed to do the same analysis and simulation. The better effects of finite measurement time and frequency have been proved.更多还原