mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-18 18:12:12 -05:00
60 lines
2.4 KiB
Plaintext
60 lines
2.4 KiB
Plaintext
To Do for FT8++
|
|
---------------
|
|
|
|
The following list is for informtion and general guidance. Everything
|
|
is subject to change, and not all ideas are necessarily good ones!
|
|
|
|
1. Nomenclature and parameters for message types
|
|
- Old-style = classic 72-bit JT-style source-encoding
|
|
FT8: (174,87) code: 72-bit info, i3bit, CRC12, isync=1
|
|
MSK144: (128,80) code: 72-bit info, CRC8
|
|
- New-style
|
|
FT8: (174,91) code: 74+3+14, sync uses isync=2
|
|
MSK144: (128,90) code: 74+3+13
|
|
|
|
2. (K1JT) For backward compatibility (good for, say, 6 months only?),
|
|
by default we'll generate old-style messages where possible, new-style
|
|
messages where they are needed. We'll decode both old and new types.
|
|
|
|
3. (K1JT -- DONE) Two new checkboxes on Advanced tab to enable 77-bit
|
|
messages:
|
|
- "Always generate new-style (77-bit) messages."
|
|
- "Decode only 77-bit messages
|
|
|
|
4. (K9AN -- MOSTLY DONE) New-style messages can be as long as 37
|
|
characters. We'll need to allow for that in a number of places.
|
|
|
|
5. (K9AN -- DONE) Subroutine genft8() will need to parse the message to be
|
|
transmitted, determine the effective message type i3 and possibly
|
|
subtype, n3. It will then generate itone, calling genft8_174_91(() if
|
|
needed.
|
|
|
|
6. (K1JT) Code to generate the user-readable messages for each
|
|
specialized type of operating, e.g., NA VHF contest, EU VHF contest,
|
|
ARRL Field Day, ARRL RTTY Roundup, use of nonstandard calls.
|
|
|
|
7. (??) Code to do the necessary auto-sequencing for each specialized
|
|
type of operating.
|
|
|
|
8. (K9AN -- MOSTLY DONE) What's needed for MSK144 with LDPC(128,90) ?
|
|
Still need to work on Sh messages. How will genmsk_128_90 know when to
|
|
generate a Sh message?
|
|
|
|
9. (K9AN) Work on the implementation of AP decoding. For which message types
|
|
should AP be implemented? For each message type/QSO state that will use
|
|
AP decoding, need to create an AP decoding table that defines the number and
|
|
type of AP decoding passes.
|
|
|
|
==========================================================================
|
|
The following are just ideas:
|
|
|
|
- Options to sort/filter decoded signals
|
|
|
|
- New Fox message type using constant-envelope waveform and higher
|
|
symbol rate to accommodate multiple simultaneous QSOs. RR73 sent to
|
|
0-5 calls, report sent to 0-5 calls. Decoding uses AP for missing
|
|
calls, thereby effectively making lower-rate codes when not all
|
|
slots are used.
|
|
|
|
- Hound should send spots of Fox to PSK Reporter.
|