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First cut at a Q65 release note

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Bill Somerville 2021-02-02 18:25:18 +00:00
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Release_Notes.txt
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@ -13,6 +13,28 @@
Copyright 2001 - 2021 by Joe Taylor, K1JT.
Release: WSJT-X 2.4.0-rc1
Feb 3, 2021
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WSJT-X 2.4.0 is a program upgrade offering a new mode called Q65. It
builds on the capabilities of the QRA64 mode to offer a flexible large
symbol alphabet, low code rate, mode with excellent characteristics
when used for EME on VHF through to microwave bands, and with
challenging weak signal propagation via iono-scatter and similar on
VHF bands. The Q65 mode carries the same 77-bit message payload as the
popular FT8, MSK144, FT4, and FST4 QSO modes. Q65 also offers a range
of T/R periods (15 second through to 5 mins) and tone spacings (up to
32 times the base spacing) suitable for adapting to required
sensitivity and various channel frequency spreading characteristics.
The Wide Graph plotter has a super-sensitive synchronization spectrum
capable of detecting signals below visibility on the waterfall plot.
The new synchronization plot combined with comprehensive a priori (AP)
decoding techniques and message summing and averaging over multiple Rx
periods should make use near the limits of extreme weak signal
operating better than prior modes in all appropriate situations.
Release: WSJT-X 2.3.0
Feb 2, 2021
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