RE: [Discuss-gnuradio] Coherent de-dispersion

[Bruce Stansby]

Hi Marcus

I havn't quiet got my head around coherant dedispersion myself, I use in 
coherant. Basically as far as I'm aware it does all the delays in fourier 
space. It is generally far superior to the standard incoherant method but for 
searching is ineficient as it can not usually be done in real time across a 
wide bandwidth.

Hence unless your trying to find a signal at a specific DM a blind search 
usually uses incoherant, unless you have a cluster at your disposal. If you are 
trying to test if the signal is ther for a specific object and not sure about 
your disperser then I suggest folding the spectral data at a pulse period, you 
can then find it in a waterfall plot of your bandpass. 

or else you can try and download DSPSR and use something that is known to work, 
if you can work out the install.

Regards Bruce

________________________________________
From: address@hidden address@hidden on behalf of Marcus D. Leech address@hidden
Sent: Thursday, 1 July 2010 8:50 AM
To: GNURadio Discussion List
Subject: [Discuss-gnuradio] Coherent de-dispersion

Anyone on this list know anything about coherent de-dispersion
filtering, and how it's supposed to work?

I've had one implemented for years, and still don't really know whether
it works or not, looking for
  clueage about how to test it.  Maybe there's *somebody* who knows
something about 'em?


--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org



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