[ntp:questions] Re: WWVB 60kHz Receiver

Jonathan Buzzard jonathan at uk.me.buzzard
Mon Apr 24 19:26:29 UTC 2006


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




More information about the questions mailing list