Hello everyone. I am working on Amplitude demodulation. I am using the
attached python code. I have some doubts as to why particular
frequencies
are chosen. Firstly, in the code
channel_coeffs = gr.firdes.low_pass (1.0, if_rate, 8000, 1000,
gr.firdes.WIN_HANN)
Why a cut off frequency of 8000Hz is chosen?
Any Particular reason why a transition bandwidth of 1000Hz is chosen?
Secondly,
volumecontrol = gr.multiply_const_ff(.003)
Why are we multiplying by a factor of 0.003?
Thirdly,
*audio_coeffs = gr.firdes.low_pass (1.0, demod_rate, 9e3, 4e3,
gr.firdes.WIN_HANN)*
Why a cut off frequency of 9000Hz is chosen?
Any Particular reason why a transition bandwidth of 4000Hz is chosen?
Thanks in advance…