Hi Jean-Michel,yep, think about it as just a bunch of numbers: The FFT doesn't know anything about the physical units involved. It just maps complex vectors to complex vectors. So, that gives you energy per bin (which translates to energy per bandwidth, if you're inclined to actually think as the output of the FFT being a vector in frequency domain).
Best regards, Marcus On 10/16/2017 01:15 AM, Jean-Michel FRIEDT wrote:
PS: the fact that reducing by 10 the number of samples in the FFT rises the noise level by 10 dB definitely hints at dB/Hz rather than dB as Y-axis unit.JM ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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