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Altera_Forum's avatar
Altera_Forum
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14 years ago

how to realize demodulation module in FPGA

hi everyone, i want to realize demodulation module in EP2C35 with verilog code,the frequency of carrier wave is 10KHz, and the frequency of modulation wave is 2.5MHz. what method or algorithm is...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

yes,my ultrosonic signal has 10KHz bandwidth on a 2.5MHz carrier,and I just receive echo signal and process it.In my system there are 30 ultrosonic transceivers,but the process flow of each one is the same.

The sample rate of A/D is 30MSPS to the echo signal.

Up to now,I have no good idea,maybe a low pass filter is ok, but I don't try it yet.Someone think DQD(digital quadrature detection) is useful.

I have no idea what way is the best for my project.