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From: Marcin on 21 Jul 2010 14:19
Hello,

I'd like to put a better and more accurate channel into my Simulink model of an optical communication system. Channel has the spectrum transfer function as show on this graph: http://img146.imageshack.us/img146/6391/channelv1.png. Is it even possible to model such channel by the means of digital filter (that's how I've tried to do it)? Thanks in advance and I'm looking forward to some help;)

Marcin.
From: Marcin on 21 Jul 2010 14:30
"Marcin " <jsensei.000(a)gmail.com> wrote in message <i27dmo$a2d$1(a)fred.mathworks.com>...
> Hello,
>
> I'd like to put a better and more accurate channel into my Simulink model of an optical communication system. Channel has the spectrum transfer function as show on this graph: http://img146.imageshack.us/img146/6391/channelv1.png. Is it even possible to model such channel by the means of digital filter (that's how I've tried to do it)? Thanks in advance and I'm looking forward to some help;)
>
> Marcin.

Please remove the dot from the end of the link. Should be: http://img146.imageshack.us/img146/6391/channelv1.png
From: Marcin on 21 Jul 2010 17:32
"Marcin " <jsensei.000(a)gmail.com> wrote in message <i27dmo$a2d$1(a)fred.mathworks.com>...
> Hello,

Could someone at least point me in some direction? What am I looking for?
From: Walter Roberson on 21 Jul 2010 17:39
Marcin wrote:
> "Marcin " <jsensei.000(a)gmail.com> wrote in message
> <i27dmo$a2d$1(a)fred.mathworks.com>...
>> Hello,
>
> Could someone at least point me in some direction? What am I looking for?

What does the X axis in the graph represent? It is unlabeled. For example,
does it represent distance? Frequency in MHz?

What would the inputs to this "channel" (or filter) be? Do you need multiple
output taps?

From: Marcin on 21 Jul 2010 18:04
Walter Roberson <roberson(a)hushmail.com> wrote in message
> What does the X axis in the graph represent? It is unlabeled. For example,
> does it represent distance? Frequency in MHz?
>
> What would the inputs to this "channel" (or filter) be? Do you need multiple
> output taps?

Oh, I haven't even noticed it wasn't labeled. I apologize. It's frequency of course. My input is a single digital signal and the output should also be a single digital signal but "affected" by the channel (the graph simply shows the channel attinuation in domain of the signal spectrum - fyi. it was measured for the 100m piece of some kind of a plastic fiber).
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