On Fri, 21 Apr 2006 21:11:07 +0000, David L. Mills wrote: > Jonathan, > > I've been down the fancy decoding path myself, e.g., the WWV driver, > which is a theoretically optimum linear receiver. However, much of the > crud found at WWVB and DCF77 frequencies is bursty, which is what my > LORAN-C receiver and program is good for. The Spectracom receiver is > actually quite good: however, it was designed to cope with Gaussian > noise, not suffer a 20-dB clobber by an interfering buzzsaw signal. > > My precerred approach, should I accept the assignement, would be to tap > onto the I and Q baseband signals in the radio, chop at something like > 10 kHz and feed to the L and R inputs on a sound card. I can take it > from there. My problemis that the SNR has become so degraded that the > very good PLL in the radio doesn't lock up. >
But that requires a much more expensive receiver than a little OEM board with short ferrite rod. So my algorithm is designed to work with what I have which is just level transitions and times there of. JAB. -- Jonathan A. Buzzard Email: jonathan (at) buzzard.me.uk Northumberland, United Kingdom. Tel: +44 1661-832195 _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
