Re: [Discuss-gnuradio] inconsistency in the PER versus distance using USRP

[George Nychis]

Bill Stevenson wrote:

> In door environment; the temperature are the same in these two 
> experiments; center frequency is 2479MHz because on one hand, I want to 
> avoid the 2400MHz to 2483MHz band which is the working band of 802.11, 
> on the other hand the bandpass filter on the 2400MHz daugterboard (2400M 
> to 2483M) and the bandwidth of USB port which is 8MHz together forced me 
> to chose the center frequency to be at most 2479MHz; all other 
> conditions in these two experiments are the same: chairs and desks are 
> fastened, not being moved, etc.
>  

Didn't you just answer your own question?  You're operating within 
802.11 interference range.  The frequency band of channel 12 is 
2456-2478MHz.  You're sitting at 2479MHz and with 8MHz bandwidth, your 
bottom 4MHz are within 802.11 interference range.  Additionally, you 
could use usrp_fft.py to actually inspect the channel and determine if 
there is any noise on it.

- George