Joe,
Thank you for your quick response.
I understood your basic approach.
However, I have an impression that your indicated bandwidth 20kHz at initial
stage and 80kHz as goal are humble and modest. This limitation would come from
not only JT software but also come from RF receiver hardware. As you said you
will assume it is SDR architecture, then, it can realize 48kHz with low-tier
soundmodem based SDR such as SoftRock. If it is DUC/DDC type, 192kHz is a piece
of cake to realize.
If the bandwidth is 192KHz, it covers entire CW and RTTY chunk up to 12m band
and we can negotiate incumbent at strong position from the beginning.
Would you explain the reason why you pick up 20KHz number?
Regards,
take
de JA5AEA
Date: Thu, 23 Feb 2017 08:27:43 +0300
From: ????? ?<c_i...@inbox.ru>
Subject: Re: [wsjt-devel] JT65 HF bands capacity, spectra allocation
and software support
To: wsjt-devel<wsjt-devel@lists.sourceforge.net>
Message-ID:<1487827663.26756...@f161.i.mail.ru>
Content-Type: text/plain; charset="utf-8"
Hello Tsutsumi san and All,
.
This may be the way we will go further with JT modes on HF bands:
.
1. 20 kHz processing bandwidth support in JT software, as we can share RTTY
spectra now
2. Shared common band for JT65 and JT9 communication modes
3. Expansion of the narrow digital modes frequency allocation down in the CW
allocated spectra, we need in extensive communication with regulators on it.
For frequency allocation we have to share full CW bandwidth, keeping in mind 80
kHz JT signals software processing support is possble in the future.
.
As some HF bands like 40/20/15m have always attracted vast majority of users,
actions listed above will let us to preserve weak signal communication there
for the several next years.
.
73 Igor UA3DJY
.
From: Takehiko Tsutsumi<take.tsutsumi@gm...> - 2017-02-21 08:15:31
Hi Igor,
In the thread concerning your proposal i.e. "new concept for JT65 HF
usage and spectra allocation", I do not see any objection to your
proposal but several comments about observation, analysis and
alternatives i.e. JT9 to be able to delay the expansion timing.
Thus, I wish to hear you concrete proposal to be able to move the
discussion forward.
Regards,
take
de JA5AEA
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, SlashDot.org! http://sdm.link/slashdot
_______________________________________________
wsjt-devel mailing list
wsjt-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wsjt-devel
