Re: [Discuss-gnuradio] anyone help me understand usrp fpga code fragment which count rssi

[Marcus D. Leech]

On 08/04/2011 09:52 PM, Page Jack wrote:
> Hi Colby,
> I know cheaper in hardware, but now I don't understand how using IIR
> filter can compute the RSSI? 
>
Seems to me that the RSSI-in-FPGA stuff was not really fully baked,
unless I'm mistaken, the RSSI
  function isn't used by any higher-level functions in the USRP2/N2XXX
implementations.

I always compute the signal strength at the final channel bandwidth, in
software, whereas the RSSI in
  the FPGA code seems to be running at the raw ADC bandwidth--which can
produce wildly
  different RSSI estimates than an estimate produced from your final
channel bandwidth.




-- 
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org