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Re: [gaia] Video about community network using HF band

Javier Simó <javier.simo@urjc.es> Wed, 18 March 2020 09:41 UTC

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To: gaia@irtf.org
References: <bf891b74-2c79-a17e-b78a-2a420cc1d158@riseup.net> <CAPOot9uWLawrpQagpKAhZYy5+Ld=edToMjK+KT3KP+3tbyWGUg@mail.gmail.com> <377af1c4-5750-3829-0d2d-74d41295b591@riseup.net>
From: Javier Simó <javier.simo@urjc.es>
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Date: Wed, 18 Mar 2020 10:41:10 +0100
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Subject: Re: [gaia] Video about community network using HF band
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18 years ago we worked on a HF packet-radio based solution and developed 
improvements  using OFDM newQPSK; getting up to 9600 bits/s. I don't 
know whether I can find the expert who might resemble all the details, 
code, etc, but if you feel it could be interesting I can explore that.

Best

Javier


El 18/3/20 a las 4:31, Rafael Diniz escribió:
> Gracias Luiz!
>
> We carried initial tests of this system in Mexico. The raw throughput,
> in reasonable propagation conditions, is from 500 up to 4k bit/s. In
> "real world" tropical region NVIS trx with hundreds of kilometers of
> distance, with packet protocol and ARQ layers in place, the net
> throughput ranges from 50 to 500 bit/s, depending on many factors.
>
> Abrazo,
> Rafael
>
>
> On 3/17/20 6:23 PM, Luis Martinez wrote:
>> Parabens Rafael !
>> It is wonderful, we are discussing a project like that in Mexico. Can
>> you share what is the speed you are able to achieve ?
>> Obrigado.
>> Luiz
>>
>>
>> On March 17, 2020 at 1:37:42 PM, Rafael Diniz (rafael@riseup.net
>> <mailto:rafael@riseup.net>) wrote:
>>
>>> Hi all,
>>>
>>> Here is the link of our latest developments about HERMES[1]:
>>> https://vimeo.com/398331581
>>>
>>> Cheers,
>>> Rafael Diniz
>>> Rhizomatica
>>>
>>> [1] https://www.rhizomatica.org/hermes/
>>>
>>> _______________________________________________
>>> gaia mailing list
>>> gaia@irtf.org <mailto:gaia@irtf.org>
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-- 


*Francisco Javier Simó Reigadas*

*Profesor, Director de la ETSIT*

*Dep**t. Teoría de la Señal y Comunic. y Sist. Telemáticos y Computación*

Universidad Rey Juan Carlos

Campus de Fuenlabrada(Madrid), España

Teléfono: 91 4888167

javier.simo@urjc.es <mailto:javier.simo@urjc.es>| www.urjc.es 
<http://www.urjc.es>| @URJC |

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