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| To: | [email protected] |
|---|---|
| Subject: | Re: VLF: EbNaut QRN and propagation considerations |
| From: | Paul Nicholson <[email protected]> |
| Date: | Wed, 27 Apr 2016 17:08:25 +0000 |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> |
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> Would you think it is more efficient to try shorter > symbol lengths in the morning time when QRN is low > or would it be better to use 100s symbols and run > the transmission partly during higher QRN periods? I guess, the most important factor is to avoid the terminators, so set the symbol period so that the message takes all day or all night. The interleaving helps the mode to cope with spells of QRN but if the terminator changes the phase part way through by more than about 90 degrees the decode will be lost. -- Paul Nicholson -- |
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