摘要
介绍了虚拟信号分析仪的结构和现代信号的处理方法。基于傅立叶变换、短时傅立叶变换和小波变换,提出了一种虚拟信号分析仪的系统软件模块的实现方法。该方法利用这三种变换,对信号进行多次处理,能够得到信号的时域、频域和时频域信息,能够对信号进行降噪处理。实验表明,利用此分析仪,能够测量信号的周期、频率、瞬时频率、时频变换趋势和奇异点,并且能以图形的形式显示出来。
The paper introduces structure of virtual signal analysis instrument and processing method of modern signal. Based on Fourier transform, short time Fourier transform and Wavelet transform,a realizing method of system software module of Virtual signal analysis instrument is proposed. By three transforms, the information of time-signal, frequency-signal and time-frequency-signal are obtained, the signal can be reduced noise. The analysis instrument can realize the measurement of signal's period, frequency, instantaneous frequency, time-frequency-distribution and singular. This information can be represented by figure.
出处
《航空计算技术》
2004年第1期87-89,共3页
Aeronautical Computing Technique
基金
国家"高等学校"骨干教师资助计划首批资助项目(2002X14)
