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| To: | [email protected] |
|---|---|
| Subject: | Re: VLF: EbNaut tonite, 'SMS' via VLF |
| From: | Markus Vester <[email protected]> |
| Date: | Mon, 29 May 2017 14:30:39 -0400 |
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Thanks Paul for trying again! The samplerate in the wav header should be correct (which would make quite a difference at this number of symbols). Looks like despite the cardioid, the received signal was not strong enough and the night may have been too noisy here. 73, Markus -----Ursprüngliche Mitteilung----- Von: Paul Nicholson <[email protected]> An: rsgb_lf_group <[email protected]> Verschickt: Mo, 29. Mai 2017 19:59 Betreff: Re: VLF: EbNaut tonite, 'SMS' via VLF Markus wrote: > I managed to produce a seamless wav with 0.514 Hz samplerate: > http://df6nm.bplaced.net/VLF/fec_tests/dl0ao_170524-25_join31uHz_wav.zip Still no decode. The correlation peaks at 20.44 dB in 12.6 uHz with offsets +2058 seconds and +0.1 Hz so it looks like the settings are correct. I'm using the sample rate 0.5143924/sec from the WAV inf1 header. It's about 9 or 10dB short of decoding. The previous attempt gave 22.09 dB in 12.6 uHz so it's lost a couple of dB somewhere. -- Paul Nicholson -- |
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