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

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] anyone help me understand usrp fpga code fragment which count rssi
Date: Thu, 04 Aug 2011 22:12:47 -0400
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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

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

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