用FFT 进行信号的频谱分析 1、高斯序列 2、衰减正弦序列 3、三角波序列 4、反三角序列-signals using the FFT spectrum analysis of one, two Gaussian sequence, the sequence of 3 attenuation sine, triangle wave sequence 4, anti - triangular series

说明 幅度为三角波的幅度调制信号在长度变化前后，信号的时间中心、频率最小、时宽和带宽的变化情况；-Descr iption amplitude of the triangular wave amplitude modulated signal before and after the change in the length of time the center of the signal, the frequency of the minimum, and when the wide band