Re: [Discuss-gnuradio] measuring RSSI - N210 with RFX2400

[Kresimir Dabcevic]

On 06/04/2011 08:07 PM, Marcus D. Leech wrote:
>
> Only a few of the motherboards have an analog RSSI on the analog
> receiver chips, and then exposed through one of the low-speed
>    ADCs.
>
> A better way is to take your signal stream and compute:
>
>      10*LOG10(DECIMATE(SINGLE_POLE_IIR_FILTER(COMPLEX_TO_MAG**2(SIGNAL))))
>
> This is entirely independent of which daughterboard you have present,
> and might also be somewhat more accurate, and less prone to
>    drift.
>

Thanks for the answers Marcus.

How can I fetch my whole signal stream from RX in order to perform computations
with it - copying just first N elements that come from usrp source with
gr_head or is there another method?

Regards,
Kresimir Dabcevic