An analog signal which is linearly composed of three single-frequency sinusoidal components F1, F2 and F3，is sampled at a sampling frequency of 1000 Hz. After the discrete-time signal passing through a low-pass filter with a cut-off frequency of 850 Hz, the resulting frequency components are 200Hz and 350Hz. Then the possible combinations of F1, F2 and F3 are:
A、1500Hz, 1350Hz and 1200Hz;
B、 1200Hz, 200Hz and 1650Hz;
C、400Hz, 200Hz and 350Hz ;
D、 900Hz, 1200Hz, 1350Hz
发布时间：2025-01-04 22:18:19
