FW: Linrad, some questions (Larry Kayser Sept 09 2002)

[Leif Asbrink <leif.asbrink@xxxxxxxxxxxxxxxxxxxx]

-----Original Message-----
From: owner-linrad@xxxxxxxxxxxxxxx
[mailto:owner-linrad@xxxxxxxxxxxxxxx]On Behalf Of Larry Kayser
Sent: Monday, September 09, 2002 1:45 AM
To: linrad@xxxxxxxxxxxxxxxxxxxxx
Subject: [linrad] Linrad, some questions


Greetings all on Linrad:

I am a Linrad potential newbie.  I have no interest in Linux by itself and 
I am interested in Linrad for what it can do for a project I am working on 
- I am trying to limit my interest in Linrad itself, ie trying to hold a 
focus on my project.  Not easy it seems.

I have some questions about Linrad.

My interest is to use Linrad as part of a tool box of software resources 
that I can use to examine weak signals, very weak signals.  I would like to 
examine .wav files using Linrad as well as other FFT based tools with a 
bandwidth of up to 20 KHz, + and - 10 KHz.  For most of the time I would be 
looking at the data some time after it has been recorded and other 
resources have discarded up to 98% of the data that has been collected.

If I have it right, Linrad can look at .WAV files, but I have no idea if 
the Linrad SDR can be used to search through a wide band recording and look 
for weak signals over the whole bandwidth or does one loose detectability 
through the recording process?  My sense is that this should be possible if 
the data is recorded at the full bandwidth and not constrained in some way 
by the Linrad software.

Next, what might the impact be of transcoding from .WAV to MP3 and then 
transcoding back to .WAV from MP3 and then using Linrad to look at the 
data?  What might the transcoding degradation be and how would it manifest 
itself?

If anyone out there in Linradland has done any work with wider bandwidth 
applications I would appreciate some thoughtful discussion in this area.

Larry Kayser
VA3LK

  






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