DSP - Task 1 - Filter Design and Digital Filtering in MATLAB

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GUIDELINES:

  1. Design different types of FIR and IIR filters for different frequency responses and 2 different sampling frequencies.
  2. Filtering of the signal and checking of correct band suppression of output signal (see spectra of input and filtered signals).
  3. Discussion on filter design and filtering results.

POINTS TO DISCUSSION:

SIGNALS TO PROCESSING:

FREQUENCY RESPONSE SPECIFICATION:

  1. Half band filters, i.e.
    a) 0 - fs/4
    b) fs/4 - fs/2
  2. Filter into telephone band, i.e.
    - pass-band edges: 300 and 3400 Hz
    - stop-band edges: 50 and 4000 Hz
    - maximal attenuation in pass-band: 0.5 dB
    - minimal attenuation in stop-band: 30 dB
  3. Filter for removing low frequency noise in speech
    - cut-off frequency: 300 Hz

HELP: (more details in [4] and [5])


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This page was created Thu Oct 19 10:15:10 CEST 2000