🚀 go-pugleaf

Cher JfSafar,

Sorry for my a bit too vehement (sharp) protests regarding to groups and
messages. I know that all this "netiquette" should be followed and that it
isn't nice to cross post for groups in different languages, but I had no
choice, and among the groups related to DSL I can access using the "Mailgate"
(www.mailgate.com) the groups in France looked like the best ones to meet
people capable to help me with the question.
I liked very much the nice attempt Maxime made as a first answer in this
Thread. Although he hasn't given the exact answer for the question, contributed
with a good explanation of QAM and a link to a page with valuable information
about the subject.

At a first instance I thought that the idea given by Maxime would be the
solution for the strange maximum amount of 15 bits per Tone, but during the
Weekend I realized that there is no necessity of a "rounded quadratic number of
bits" as I mentioned in my question. There should be any other limitation
determining this value... Now you came with the exact explanation and put a
final point in the problem.
Thank you for your help and I hope I can still be of any help in the future.
Even if it would be to teach you any words in Portuguese! :)

I would like also to apologise for any disturbances I my have caused cross
posting to many groups and creating a salad of languages in the thread. I will
look forward to be more careful in the future.

Thanks / Merci

Greetings / ??

Alexandre Heil Fran�a

"JfSafar" <jfsafar@easynet.fr> wrote in message
news:3bf4ebb2$0$15820$626a54ce@news.free.fr...

> /english on
> 
> Dear Alexandre
> Ok, i apologize for my first message because i didn' t see you had
> crossposted in others ng.
> Too hurry, because lot of work here..:-(
> 
> I think you made a little confusion in your question.
> 15 bits per tone is the maximum bit/symbol to achieve a 0,0000001 bit error
> rate.
> this correspond to a signal noise ratio of 54,8 dB.
> If you want to rise this value (bits per tone), the SNR will rise too, so it
> will be impossible (or very difficult) to tecchnically install adsl lines.
> To achieve this, the QAM constellation size is 32768 (ie 7 sine and 8
> cosine), because of QAM definition (modulation of phase and amplitude).
> 
> I send you directly a pdf document in english wich explain that.
> 
> PS : i am not "anti-other languages than french"..and i'll be glad if you
> would learn me a few brasilian  words to help me better understand the
> fabulous music of your country :-)
> Excuse me if others answered before me, i have not read all forums in wich
> you have posted your question.

<...>


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