Re: [10GBASE-T] The channel model
Xiaopeng,
Worst case channel models for category cables are specified in TIA and ISO
cabling standards.
Given that one of our objectives is to operate over ISO 11801 cabling we
should use the cabling
standards (ISO and TIA) channel specifications as our 10GBASE-T model
baseline (whenever
possible).
For 1000BASE-T, the channel models we used in the matlab simulations
consisted of measurements
(magnitude and phase) of cabling channels scaled to the envelope of the
worst case function specified.
Regards,
Chris
----- Original Message -----
From: <xichen@marvell.com>
To: <stds-802-3-10gbt@ieee.org>
Sent: Tuesday, January 14, 2003 2:44 PM
Subject: [10GBASE-T] The channel model
>
> I would like to propose the following channel and noise model. Then we
> can work together to come up with a model that all of us agree on.
>
> 1. Channel insertion loss model: refer to the RLCG model on page 47 of
> T1E1.4/2000-002R6. Then calibrate the insertion loss (100m) at 100MHz to
> 21dB for CAT-6 and 24dB for CAT-5/5E.
>
> 2. NEXT model: ~f^(1.5)n^(0.6) where n is number of disturbers. In our
> case, n=3. Then calibrate the NEXT at 100MHz to -31dB for CAT-5E
and -40dB
> for CAT-6.
>
> 3. ELFEXT model: ~f^(2)n^(0.6) where n is number of disturbers. In our
> case, n=3. Then calibrate the ELFEXT (100m) at 100MHz to -19dB for CAT-5E
> and -24dB for CAT-6.
>
> 4. ANEXT model:
> CAT-5E: max[-65, -38+15log10(f/1e8)] dB
> CAT-6: max[-65, -41+15log10(f/1e8)] dB
>
> 5: Tranformer model: please contribute
>
> Xiaopeng
>
>
>
>
>