Dear Bloessl and gnuradio list,
I am currently working on gr-ieee80211. Now I want to use the long
preamble to estimate the CSI. However, after I apply fft to the long
preamble, I found the power for each channel is not the same. I took an
average over lots of packets. The power near the middle sub-carriers are
always very lower than on the edges. I would like to ask if it is
because the Power spectral density in the transmitter or some other reasons.
Any feedback would be appreciated.
Best regards
Alex
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