[SI-LIST] Re: long distance calbe data transferring
- From: Georg.Ramsch@xxxxxxxxxxx (Georg Ramsch)
- To: wangyf@xxxxxxxxxxx
- Date: Wed, 08 Sep 2004 20:10:02 +0200
Hallo, Wang !
1) Just a proposal: why do you not use standard DSL chip sets available
in the market?
There is a miriad of those from Infineon, Connexant etc. They offer a
lot of development support.
2) see 1)
3) Simulation: ETSI regulations ( DSL: ITU G.992 G.991 and others )
give information about 7 different telecom cable types with
their impedance over frequency and also stray parameters ( R',L,C').
4) see 1)
On a US web site there is also a noise calculator for telecom cable
occupied with
POTS / ISDN / DSL technologies to estimate
noise level and therefore BER ( Lets see if I find the link, it is
already some years ago ).
My 2 cents
Georg
wangyf@xxxxxxxxxxx wrote:
>Hi, all
>I’m dealing with a project of transferring digital data via 7 km copper
>twisted cable, the data rate is 510-kbit/s or higher, and BER needed is
>1E-5 or lower. This must be a challenging task as the 0s and 1s are
>smeared after they traveled through such a long way. My questions are:
>1. What kind of code is best suited for the transfer.
>2. I need equalization, but are there any proper equalizer for this?
>3. How can I develop model for 7km copper twisted cable? Is there any
>simulation tool for it?
>4. One approach is using ADC to sampling the signal, and then use DSP to
>enhance it. Is it a good method?
>I want to have your helps, and thanks in advance.
>
>Yanfang Wang
>Fast Electronics Laboratory
>University of Science & Technology of China
>E-mail: wangyf@xxxxxxxxxxx
>Phone: +86-551-3603114
>FAX: +86-551-3603114
>
>------------------------------------------------------------------
>To unsubscribe from si-list:
>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
>or to administer your membership from a web page, go to:
>//www.freelists.org/webpage/si-list
>
>For help:
>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>List FAQ wiki page is located at:
> http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>
>List technical documents are available at:
> http://www.si-list.org
>
>List archives are viewable at:
> //www.freelists.org/archives/si-list
>or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
>Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
>
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
