AM demodulator

[Doaa Ali]

Hello,

Could you please tell me how to choose the type of low pass filter in AM demodulator properties, (rectangle, cosine roll off and squared cosine roll off) and why the cosine roll-off is preferable?

Regards,
Doaa

[Ahmad Atieh]

Dear Doaa,
please note that the filter’s design parameters allow users to control the flatness of the filter response, the rise/fall (roll-off) of the filter, ripple, etc…
The filter complexity has to be taken into account in the design to achieve the desired specifications. You need to compromise between the filter type and order, number of taps (in case of digital filter), to get the desired filter for your system.
Regards,
Ahmad

[Ahmad Atieh]

Dear Doaa,
please note that the filter’s design parameters allow users to control the flatness of the filter response, the rise/fall (roll-off) of the filter, ripple, etc…
The filter complexity has to be taken into account in the design to achieve the desired specifications. You need to compromise between the filter type and order, number of taps (in case of digital filter), to get the desired filter for your system.
Regards,
Ahmad

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