[digitalradio] What is ALE?

[expeditionradio]

> bruce wa4gch wrote:
> 
> OK what is ALE ? somewhere i got lost  ??? 

Hi Bruce,


You can read all about what ALE is on the HFLINK website.
http://hflink.com

ALE is the de facto world standard digital system for initiating and
maintaining optimum HF communications in any mode (such as data or
voice). 

ALE has been adapted into a ham-friendly system, for calling, CQing,
net call up, and messaging. Recently, hams have added short message
text email capability. 

You can run full ALE with PCALE software, and basic ALE with Multipsk
software. Other ham digital software authors are supporting it as
well. You can also get HF transceivers that have ALE built in.

There is other stuff being developed under the ALE umbrella...

73 Bonnie KQ6XA

[digitalradio] DV activity on 14236.0

[Steinar Aanesland]

All:

I'll be QRV on 14.236 MHz  this evening from 17:50 UTC with the latest
version of Drmdv.
Download the software from http://n1su.com/drmdv/ , and download
the melp_dll.dll and melp_1400.dll files zipped together from this place
http://www.ku7pdx.com/files/melp_dll.zip.

Skeds welcome!

73 de LA5VNA Steinar





Paul Metzger skrev:
>
> I'm monitoring 14.236 for the past 15 minutes, hearing DV fade in and
> out here in Los Angeles.
>
> Try the new DV chat room, I was up until 4AM getting it to go.
>
> http://www.hamradio-dv.org/aor/digital-ssb/chat-room/chat-room.htm
> 
>
> Let me know what you think.
>
> Paul Metzger
> KQ6EH
>
> 
>
> On Nov 2, 2006, at 10:37, Tony wrote:
>
> > All:
> >
> > Still on WinDRM / DRMDV 14236 as of 1830z
> >
> >
> > Tony KT2Q
> >
> >
> > - Original Message -
> > From: "Tony" <[EMAIL PROTECTED] >
> > To: <[EMAIL PROTECTED] >
> > Cc:  >
> > Sent: Thursday, November 02, 2006 1:16 PM
> > Subject: [WinDRM] DV activity now -- 14236.0
> >
> >
> >>
> >> All:
> >>
> >> Mel (K0PFX) Cesco (HB9TLK) and G0OGX on 14236 WinDRM.
> >>
> >> Its' 0615z...
> >>
> >> Tony KT2Q
> >>
> >>
> >>
> >> --~--~-~--~~~---~--~~
> >> You received this message because you are subscribed to the Google
> >> Groups
> >> "WinDRM" group.
> >> To post to this group, send email to [EMAIL PROTECTED]
> 
> >> To unsubscribe from this group, send email to
> >> [EMAIL PROTECTED]
> 
> >> For more options, visit this group at
> >> http://groups-beta.google.com/group/WinDRM
> 
> >> -~--~~~~--~~--~--~---
> >>
> >>
> >
> >
> >
> >
> > Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
> 
> >
> > Other areas of interest:
> >
> > The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/
> 
> > DigiPol: http://groups.yahoo.com/group/Digipol
>  (band plan policy
> > discussion)
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>  

Re: [digitalradio] A.L.E., VHS and Betamax

[bruce mallon]

--- Walt DuBose <[EMAIL PROTECTED]> wrote:

There's nothing wrong with the current ALE...I'm
just dreaming and thinking what  could happen in the
future.

OK what is ALE ? somewhere i got lost  ???


   

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Re: [digitalradio] A.L.E., VHS and Betamax

[Walt DuBose]

There's nothing wrong with the current ALE...I'm just dreaming and thinking 
what 
could happen in the future.


73,

Walt/K5YFW

Rick wrote:
> Walt,
> 
> What is wrong with the current ALE design? One of the primary goals of 
> ALE is to call up or otherwise alert someone that you want to 
> communicate with and seems to meet your objectives.
> 
> 73,
> 
> Rick, KV9U
> 
> 
> Walt DuBose wrote:
> 
>>I don't see the current ALE as being anywhere close to the desires of 
>>amateurs...however, it IS a good start.
>>
>>I look for the future to allow hams to transmit ALE queries on one or several 
>>frequencies on each of the hambands and individual stations or net stations 
>>being called would respond on a specific frequency.  This would allow 
>>impromptu 
>>QSOs between individual amateurs as well as the ability to call nets together 
>>at 
>>other than regualr net times, i.e. emergency nets or listing traffic for 
>>various 
>>stations or locations.  It could easily be used for calling CQ and indicating 
>>you "listening" frequency.  Another use would be for evaluating propagation 
>>between various areas by using ALE "beacon or propagation" stations.
>>
>>73,
>>
>>Walt/K5YFW
>>

Re: [digitalradio] A.L.E., VHS and Betamax

[Steve Hajducek]

GM Rick,

Alternate Link Call (AQC) ALE is basically 2G Plus ALE in that its an 
advanced 8FSK form of ALE where most all of the un-necessary overhead 
of ALE has been removed and new capabilities have been added, to 
include a PSK burst mode. The linking time to setup is must faster 
with AQC-ALE and the ability to achieve a linked state in the face of 
poor channel conditions is hugely improved.

Remember this, ALE is the great facilitator of follow on traffic, be 
it data or voice ( analog or digital) or remote signaling for command 
and control and where the data may be of any format and not just 8FSK 
ALE or other MIL-STD protocols, there are no limitations to what 
follows after the ALE Link Quality Analysis (LQA) has been used to 
select the best channel from those provided to work with.

GTOR and PACTOR I are a challenge within the frame work on an event 
driven OS to implement, if you take control of the OS and limit the 
interrupts to a point of which the application is in control of 
environment, which would for the most part preclude the multi-tasking 
3rd party application aspect of the OS to point where only the 
digital communications application is running, then it even these 
fast timing ACK/NAK protocols would work, even AMTOR ARQ which is 
even a worst case than PACTOR I timing. As to the new PACTOR x and 
CLOVER modes, they do not have the same short turn around timing, 
PACTOR III is basically modeled after the newer Military waveforms 
which run on the MIL-STD-188-110x modem.

The work that Patrick has done with FAE ARQ to date is the best 
example of an FSK ARQ protocol for Amateur Radio designed for the PC 
Sound Device Modem (PCSDM) in my opinion, it provides the best 
aspects of the MIL-STD ALE DBM ARQ protocol ( developed from the 
MIL-STD's which Kantronics also worked up GTOR from) and PAX/PAX2 
into a new protocol that I find to be perfect for Amateur Radio at 
keyboard to keyboard, file transfer and HF e-mail needs. What the 
Amateur Radio Service will see come along on the PCSDM in the way of 
a high speed PSK modem waveform that provides all the desired 
features and is legal in all countries for use is yet to be seen. Its 
obvious to me that the MIL-STD-188-110x modem with one of a number of 
DLP waveforms are contenders, timing is not an issue as far as the OS 
is concerned and the speed is certainly there, just as fast and even 
faster and as and more robust than is PACTOR III which the ham world 
uses as the yard stick for some reason, tailoring down of the PSK 
carrier and symbol rate for less than 3Khz signal BW is doable, some 
hardware modems support it and I did in MARS-ALE, but its still to 
much under current FCC rules for Amateur Radio here in the U.S., so 
stay tuned for more developments to come is what I say and for now 
embrace the legal FSK ARQ waveforms on the PCSDM.

/s/ Steve, N2CKH

At 11:43 PM 6/18/2007, you wrote:
>Steve,
>
>Can you give us some current information on AQC-ALE? I had not been
>familiar with this term but did a little web surfing and found a very
>interesting document:
>
>http://www.dsto.defence.gov.au/publications/2402/DSTO-CR-0214.pdf
>
>That covers a rather full spectrum of digital modes, including amateur
>ones.
>
>Curiously, some of the information seems to support my comments a while
>back about using multiple PSK like tones to come up with a higher speed
>modem, without having too high a baud rate. Is this still too difficult
>to implement in software such as the 64 tone with moderate baud rate,
>can still have a high bps rate.
>
>It is interesting to note that many of these  modes do not work below +
>10 dB S/N. We already have some pretty good speeds with WinDRM types of
>modulation that effectively using a QAM protocol with significant
>throughput at somewhat lower than +10.
>
>Amateur radio, being very different from commercial/military use of
>radio, does not typically need a calling system since we do this with
>the CQ in most any mode. I can see some applications from ALE for
>emergency use or for personal preference, but it will never be all that
>popular with the average digital ham that doesn't use it in this manner.
>
>I was surprised to see your comment that Pactor and Clover could be used
>via sound card modems if they were not proprietary. The conventional
>wisdom is that these modes require a much too fast switching time to
>implement with non real time computers and even Linux was not able to
>work well enough with Pactor I to equal a hardware modem.
>
>What I do think is very doable is to use the waveforms that we know
>work, and the techniques that we know work with weaker signals and yet
>can scale up for improved speeds under good condx, and do this using an
>ARQ pipelining technique of performing the computer time on the last
>packet in the background while the next packet is coming through. In
>fact, this is what I hope will come out of the ARRL's interest in
>possibly developing a new HF mode(s) for soundc