[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] USRP Status.
From: |
Marcus Leech |
Subject: |
Re: [Discuss-gnuradio] USRP Status. |
Date: |
Tue, 14 Jun 2005 12:33:36 -0400 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 |
I have an automatic equalizer function on my spectrum analyser (not
gnuradio, and not
USRP), to deal with exactly this problem. It doesn't work that
tremendously well, but
it does flatten the spectral response somewhat. My application was
radio astronomy.
My USRP is on its way (got a note from DHL yesterday--hurray).
Expect many stupid questions in the next few weeks, y'all :-)
n4hy wrote:
The cheapest dirtiest thing to do is to normalize the baseline (up to
some
extent or some frequency bounds) so you get a straight threshold
detection
problem. The correct thing to do is to use different filters but that
involves
changing FPGA code while trying to bring out four or five hardware
modules!
Bob
Lamar Owen wrote:
Now that I'm getting my mind wrapped around some of the concepts in
DSP, and having read the AD9862 docs and such, I have a status
request of Matt:
How's the half-band filter situation going? For radio astronomy
spectrography, the curved baseline with 1dB or less per division
really makes it difficult to do the work. What can be done to help
in this regard? When the signal, fully integrated, is a half dB or
so out of the noise that curve gets mighty annoying. Does current
USRP hardware CVS have anything new?
_______________________________________________
Discuss-gnuradio mailing list
address@hidden
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
--
Marcus Leech Mail: Dept 1A12, M/S: 04352P16
Security Standards Advisor Phone: (ESN) 393-9145 +1 613 763 9145
Advanced Technology Research
Nortel Networks address@hidden