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Altera_Forum
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10 years ago

Using fpga to implement long length FFT

Hello Guys, I got a long length data, and want to convert the data from time domain to frequency domain. These data from ADC, the sampling frequrency is 20MHz, and sampling time is about severa...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

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use a suitable resolution. fft does not need to be same size as a chunk of data.

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Dear kaz,

Thanks for you quickly reply!

"suitable resolution" means i just need to select reasonable FFT length, which can recognize all signal frequency spectrum i concern. Am i right?

BTW, which IO type i should use in this case?

Thanks

Jerry