On 26 Mar 2014, at 15:05, alex <alexleeresea...@gmail.com> wrote: > > 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. >
If your sample rate is 20MHz you will see an uncompensated filter, but in that case the power of the subcarriers in the center should be higher. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
