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Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz

from [Paul Nicholson] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz
From: Paul Nicholson <[email protected]>
Date: Wed, 2 Nov 2016 19:57:35 +0000
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Stefan wrote:

> f = 6470.00000 Hz
> Start time: 02.11.2016 07:00:00 UTC
> Symbol length: 30 s
> Characters: 7
> CRC 16
> Coding 16K25A
> Duration: 10h, 56m, 0s
> Antenna current: ~ 280 mA

Copied 'SUCCESS' at Eb/N0 = -0.2 dB BER 40.5%.

Constant reference phase.

Carrier S/N 15.5 dB in 25.4 uHz.
-64.4 dB in 2500 Hz after sferic blanking.

I was expecting to decode at about +1.2dB based on
yesterday's S/N ratio. Today must have been a little
noisier and I had to use a more aggressive blanker
setting to maximise the Eb/N0.

Uwe wrote:

> EbNaut RX V0,4d tells me “Error: Not enough memory (trellis)”.

You'll need a spare 22 GByte of RAM to decode this one.

--
Paul Nicholson
--
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