Revisit Experiment 12.1 performing the following tasks:

(a) Design a direct-form FIR filter using the following specifications:

\[\begin{aligned}A_{\mathrm{p}} & =0.1 \mathrm{~dB} \\A_{\mathrm{r}} & =45 \mathrm{~dB} \\\Omega_{\mathrm{p}} & =2 \pi 9700 \mathrm{~Hz} \\\Omega_{\mathrm{r}} & =2 \pi 10300 \mathrm{~Hz} .\end{aligned}\]

Compare the number of multiplications required by this filter with that required by the frequency-response masking designed in the experiment.

(b) Design a new frequency-response masking filter suitable for \(F S=100 \mathrm{kHz}\).

(c) Design a new frequency-response masking filter to remove the upper baseband when \(\mathrm{f} 1=100\).

Transcribed Image Text:

Experiment 12.1 A base-band telephone speech signal occupies the frequency range around 300-3600 Hz. Let us emulate such a signal as a sum of four sinusoids as given by Fs = 40000; Ts = 1/Fs; time = 0:Ts: (1-Ts); f1 =300; f2 = 1000; f3 = 2500; f4 = 3600; s1 = sin(2*pi* f1 time); s2 = sin(2*pi*f2*time); s3 =sin(2*pi*f3*time); s4 = sin(2*pi*f4*time); xs1 + s2 + s3 s4;