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3. The specifications for a lowpass FIR digital filter are: peak passband ripple is 0.25 dB; minimum stopband attenuation is 45 dB; passband edge frequency

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3. The specifications for a lowpass FIR digital filter are: peak passband ripple is 0.25 dB; minimum stopband attenuation is 45 dB; passband edge frequency is 4 kHz; stopband edge frequency is 6 kHz; sampling frequency is 20 kHz. Determine using Kaiser's formula the filter order required to satisfy the above specifications. (5 points) 3. The specifications for a lowpass FIR digital filter are: peak passband ripple is 0.25 dB; minimum stopband attenuation is 45 dB; passband edge frequency is 4 kHz; stopband edge frequency is 6 kHz; sampling frequency is 20 kHz. Determine using Kaiser's formula the filter order required to satisfy the above specifications. (5 points)

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