Re: [Discuss-gnuradio] GNU radio

[Marcus D. Leech]

On 21/09/2011 11:34 AM, Andrew Rich wrote:
> I was just looking at the N200
>
> Do these hardware components have sensitivity figures ?
That depends entirely on the daughterboard you chose.  Although most of 
them have noise figures in the 4-5dB range at maximum gain.
  If you're just interested in RX in the 1090MHz range, I'd suggest the 
DBS_RX2.  Sensitivity is dominated by noise figure.  If you need
  lower noise figures you'll have to put a band-specific LNA in front, 
which is what I do for radio astronomy.

> I am interested in passive RADAR
>
> I have been using a 1090 MHz receiver and a cheap digital OSCilloscope 
> commaned under LINUX as a capture device.
>
> I guess that is sort of what the hardware and software of an SDR does ?
>
> My system is very slow
In an SDR, nearly-all the processing is done on the host computer, so 
you need a fastish computer.  Overall compute requirements
  are roughly proportional to sample_rate * complexity-per-sample.


> >