[10GBASE-T] [10GBT-Modeling] DFE SNR Simulation: Time-Domain Channel Impulse Responses

["Andrew Baek" <andrew_baek@hotmail.com>]

All,

 

I have been approaching this topic in time domain.  The first step in the direction was to derive

time-domain impulse responses.  Attached are the reponses only due to the insertion loss based on

the three different sources: Avaya measurement on Cat6 from Terry Cobb, the SolarFlare model,

and the Class D model. 

 

The Avaya and SolarFlare produced reasonable looking reponses, while the Class D didn't seem to

result in correct waveform shape.  For the phase of Class D, linear phase was assumed

and the propagation delay used for the plot was computed from the Avaya measurement (assuming

that the signal speed is more or less the same on both Cat5 and Cat6).

 

I am now in the process of performing time-domain simulations of the DFE architecture.  Initially I plan to run

the simulation on the Class D model with linear phase.  The various prop. delays can be extracted from the Avaya

measurements (in most cases, the measurements show constant group delays).  Once I develop

the program, different measurements and models can be simulated.

 

Please let me know if you have any comments.

 

Regards,

 

Andrew

 

 

Time-Domain Impulse Responses.doc