[pskmail] Re: Other digital modes for PSKMail
- From: ve7cus@xxxxxxx
- To: pskmail@xxxxxxxxxxxxx
- Date: Fri, 9 Nov 2007 18:13:55 -0800
Vojtech,
I think you will find that Fldigi does MFSK 16 as well.
Darrel
On 9-Nov-07, at 3:26 PM, Vojtěch Bubník wrote:
Hi John.
I would like to experiment with other modes. Logic tells me that a
mode with
longitudinal FEC of some kind should help since the part affected
by the
strike could be re-built provided it is small enough. What would
you propose
I try first? Olivia or MFSK16 or others? Speed can be reduced, but
I would
like to keep a reasonnable bandwidth (500Hz if possible, and not
more than
1000Hz).
I would recommend MFSK16 with a RSID sent in front of connect
request / connect response packets. This way both sides would know
their exact frequencies. Both sides would need to have stable enough
VFOs though. Oh, pitty, RSID is currently implemented only in
MultiPSK, but Patrick is willing to give away source code to the
developers.
Olivia coding is less effective than MFSK16, but on the other side
it has strong correlation, by which the signal may be localized in
frequency.
How about PSK63F or PSK125F? PSK63F is a mode derived from PSK63,
but uses MFSK16 FEC and coding. I will release PSK63F support in
PocketDigi soon hopefully, Dave may port it to flDigi.
73, Vojtech OK1IAK
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