Exercise B: Digital Filter Design
Using sptool of MATLAB software program, implement the following tasks. For each task,
you need to prepare and send the filter coefficients (sequence of values), and filter frequency
response plot (.png, .bmp, .pdf, …). Name each file according to the number of corresponding
task, and send all of them as a .zip file to the address below:
xamiri@fi.muni.cz
Deadline is April 29th
.
1) Design a digital FIR lowpass filter with the following specifications. Apply Parks-McClellan
method (also known as the Equiripple, or Optimal method). Set filter order to minimum. Obtain
the filter coefficients and frequency response of the designed filter.
Passband cutoff frequency: fp = 2 kHz
Stopband cutoff frequency: fs = 3 kHz
Passband ripple: Rp = 0.25 dB
Stopband attenuation: Rs = 50 dB
Sampling frequency: fs = 20 kHz
2) Design a digital FIR bandpass filter with the following specifications. Apply Parks-McClellan
method (also known as the Equiripple, or Optimal method). Set filter order to minimum. Obtain
the filter coefficients and frequency response of the designed filter.
Passband: 8-12 kHz
Stopband attenuation: Rs = 50 dB
Passband ripple: Rp = 0.001 dB
Transition width: 3 kHz
Sampling frequency: fs = 44.1 kHz