lionelgreenstreet
Junior Member level 3
analog filter design
I want to realize a simple analog low-pass first order filter in matl ab, but i waant also obtain time domain output if an input signal is present. So:
1)input time domain signal is realized with an array of values (i'm not using symbolic)
2)fft of input signal: i consider only frequencies equal and under fs/2 (with fs=sampling frequency)
3)realization of analog low pass filter with freqs comand
4)multiplication input signal's fft with analog low pass filter response
I'm not able to obtain from values in 4) equivalent time domain output singnal....how can i do?
thanks
I want to realize a simple analog low-pass first order filter in matl ab, but i waant also obtain time domain output if an input signal is present. So:
1)input time domain signal is realized with an array of values (i'm not using symbolic)
2)fft of input signal: i consider only frequencies equal and under fs/2 (with fs=sampling frequency)
3)realization of analog low pass filter with freqs comand
4)multiplication input signal's fft with analog low pass filter response
I'm not able to obtain from values in 4) equivalent time domain output singnal....how can i do?
thanks
