An analogue input signal to a real-time DSP system is bandlimited, before it is digitised, with...

 

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An analogue input signal to a real-time DSP system is bandlimited, before it is digitised, with an analogue lowpass filter having a fourth-order Butterworth characteristics and a cut-off frequency fc = 100 Hz. If the aliasing error due to sampling is to be less than 1.5% of the signal level in the passband, determine the minimum sampling frequency, Fs(min), required for the system. (Ans: Fs(min)= 407.56 Hz). An analogue input signal to a real-time DSP system is bandlimited, before it is digitised, with an analogue lowpass filter having a fourth-order Butterworth characteristics and a cut-off frequency fc = 100 Hz. If the aliasing error due to sampling is to be less than 1.5% of the signal level in the passband, determine the minimum sampling frequency, Fs(min), required for the system. (Ans: Fs(min)= 407.56 Hz).