|Subject:||[Discuss-gnuradio] Problems in AM Demodulation|
|Date:||Thu, 29 Mar 2007 21:31:23 +0530|
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?
volumecontrol = gr.multiply_const_ff (.003)
Why are we multiplying by a factor of 0.003?
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..
Description: Text document
|[Prev in Thread]||Current Thread||[Next in Thread]|