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: discuss-gnuradio-bounces+bruce.stansby=postgrad.curtin.edu...@gnu.org [discuss-gnuradio-bounces+bruce.stansby=postgrad.curtin.edu...@gnu.org] on behalf of Marcus D. Leech [[email protected]] 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 _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
