Discuss the below:
1. Design a digital LPF to be used in the configuration
H(z) is the digital low-pass filter.
To satisfy the following requirements:
Sampling rate = 8 kilosamples/sec
Passband edge of 1.5kHz with ripple of 3dB
Stopband edge of 2kHz with attenuation of 40dB
Equiripple Passband but monotone Stopband, and
Impulse invariance
(a) Choose T=1 in the impulse invariance method and determine the system function H(z) in parallel form. Plot the log-magnitude response in dB and the impulse response h(n).
(b) Choose T=1/8000 in the impulse invariance method and determine the system function H(z) in parallel form. Plot the log-magnitude response in dB and the impulse response h(n). Comment on the effect of T on the impulse invariance