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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

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Are you generating the 10kHz signal on the 2.5MHz carrier? If so, it will make your system design easier if the FPGA processing the receiver channels uses the same reference frequency as the transmitter.

Out of interest, why is the ultrasonic bandwidth only 10kHz? That seems like a very narrow bandwidth (relative to the sonar and medical ultrasound devices I've used).

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Maybe I didn't express clearly. 10KHz isn't the bandwith of ultrasonic signal,which is the frequency of envelope of modulated signal.