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Re: VLF: 16K19A?

To: [email protected]
Subject: Re: VLF: 16K19A?
From: DK7FC <[email protected]>
Date: Sun, 26 Feb 2017 22:31:16 +0100
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...another point: I tried to understand as much as possible from
16k is convincing.
What about 32K? No significant additional advantage or not practicable for normal PCs?
Also it would be interesting to see graphs for the message success rate
= f (Eb/No) for various list lengths. In my recent transmissions i'm
playing with the CRC value so that the optimum list length is in a range
of 100000. It would be interesting to see which difference a list length
of e.g. 200000 makes. In my transmission which is running right now,
going from CRC14 to CRC15 would mean a doubling (ish) of the list
length. The transmission time would just have been 6 minutes longer...
73, Stefan

Am 26.02.2017 22:16, schrieb DK7FC:
Hi Paul,

Why is there no mode called 16K19A? Would that combination make no sense? With messages longer than 12 characters i may come to a critical value for most EbNaut decoders, so i will need to switch to 8K19A. Switching from 8K21A to 16K21A has an advantage (using the same transmission time), as far as i understand...
73, Stefan

PS: Here i'm preparing for transmissions on lower frequencies again...

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