ARLA/CLUSTER: FSQ - Fast Simple QSO: Novo modo digital com codigo fonte aberto

[Paulo Faria]

Viva Luis.
Sim claro. Dei uma olhadela ao manual e parece muito melhor que o ros. Pelo 
menos em teoria. Falta o teste prático.
Sempre me chateou a lentidão do ros e jt, muito embora o SNR destes modos 
seja bom, não são assim tão robustos. O Olivia e um modo muito eficaz e na 
linha destes que falei antes.
Lembro-me de andar a seguir um balão em UHF durante dias a milhares de km, 
com sinais fraquíssimos. Era praticamente inaudível no entanto o "Olívia" 
não falhava.

Teoria a parte, vamos pois testar isto.
Fica o convite feito aos restantes.
Anunciarei nos comments do dxcluster a frequência onde estarei QRV, mas não 
deve andar longe dos 7105kHz.

73 de CS8ABA

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A 9 de Fevereiro de 2015 13:18:22 Luís Garcia Filipe 
<afterhours36  gmail.com> escreveu:

> Queres fazer um teste logo á noite Paulo?
>
> Já estou a ler sobre o novo modo, parece....engraçado
>
> 73
>
>
> CS7AEL
>
> 2015-02-09 14:01 GMT+00:00 Paulo Faria <pauloafaria  sapo.pt>:
>
> >  Obrigado João.
> > Aqui pronto a testar QRV 7105kHz
> >
> > de CS8ABA Paulo Faria
> >
> > On 09-02-2015 12:25, João Costa > CT1FBF wrote:
> >
> >  New open source data mode FSQ
> >
> > Con Wassilieff ZL2AFP has developed a new fast simple chat data mode
> > for use on HF and VHF
> >
> > FSQ is a Fast Simple QSO mode for MF/HF. It works well under NVIS and
> > sunrise/sunset conditions on the lower bands, and also works well for
> > short skip on higher bands. It can also be used on VHF FM, and clearly
> > has a much wider useful range of operating conditions that other more
> > conventional digital modes. Sending speed can be varied between 20 and
> > 60 WPM.
> >
> > FSQ is designed for simple but effective 'Chat' operation, rather like
> > phone text messaging or Skypeâ„¢ chat; fast and easy to use. You don't
> > use 'overs' as you would with a conventional digital or voice mode. It
> > is highly suited to net operation. You just type a sentence and press
> > Enter.
> >
> > An important factor in the design of FSQ is that no synchronising
> > process is required to locate and decode the received characters. Lack
> > of sync means that reception is much less influenced by propagation
> > timing changes that affect almost all other modes, since timing is
> > quite unimportant; it almost completely eliminates impulse noise
> > disruption; and it also contributes to very fast acquisition of the
> > signal (decoding reliably within one symbol of start of reception).
> > Fast acquisition removes the need for addition of extra idle
> > characters at the start of transmission, and this leads to a very
> > slick system. Add high resistance to QRM and QRN, thanks to the low
> > baud rate, and you have a system so robust that it does not need error
> > correction.
> >
> > Sensitivity is believed to be about -13 dB SNR at 6 baud, and -16 dB
> > SNR at 3 baud. That's about 10dB better and several times faster than
> > 12 WPM Morse.
> >
> > FSQ is NOT compatible in any way with EXChat or DominoEX. While also a
> > Chat mode, it uses a completely new and revolutionary protocol.
> >
> > Read more about FSQ athttp://www.qsl.net/zl1bpu/MFSK/FSQweb.htm
> >
> > Direct download linkhttp://www.qsl.net/zl1bpu/SOFT/FSQCALL.zip
> >
> >
> >
> > _______________________________________________
> > CLUSTER mailing 
> listCLUSTER  radio-amador.nethttp://radio-amador.net/cgi-bin/mailman/listinfo/cluster
> >
> >
> >
> > _______________________________________________
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> >
> >
>
>
> --
> Cumprimentos;
>
> Luís Filipe Garcia S.
>
>
>
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