基于Gabor谱方法的跳频信号时频分析

Time Frequency Analysis of Frequency Hopping Signals Based on Gabor Spectrum Method

为研究跳频信号随时间跳变的频谱特征,利用Gabor谱能量集中、时频分辨率高、交叉项干扰小的特点,对跳频信号进行时频分析,与其他常用时频分析方法比较得到了更精确的时变谱特征描述。通过对仿真结果的比较分析,证明了该方法对跳频信号分析的有效性,其方法也适用于其他非平稳信号的分析。

To investigate the spectrum characteristics of frequency-hopping signals varyea with time, this paper analyzes frequency-hopping signals based on Gabor spectrum method, that has the advantages of concentration of energy, high resolution in time-frequency domain and eliminating cross-terms interference. More exact results of time varying spectrum are obtained by the method compared with other methods. Simulation results show that the method is effective to analyze the frequency-hopping signal in time-frequency domain, and is suitable for other non-stationary signal processing.