Peak in fft of OFDM

when I ran benchmark_ofdm_tx.py I am getting a peak as shown in the
attached
figure.
I used both usrp and usrp2 . with both RFX2400 and XCVR2450.
http://old.nabble.com/file/p32438726/peak%2Bat%2Bofdm%2Bfrom%2Busrp.png
http://old.nabble.com/file/p32438726/peak%2Bat%2Bofdm%2Bfrom%2Busrp2.png

I took trace and hence I can see that there wasn’t any peak there before
the
transmission.


Sumit Kr.
Research Assistant
Communication Research center
IIIT Hyderabad
India

View this message in context:
http://old.nabble.com/peak-in-fft-of-OFDM-tp32438726p32438726.html
Sent from the GnuRadio mailing list archive at Nabble.com.