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Channel Data Folder

This is the folder that will be searched for the channel files specified in configurations, these can either be Touchstone (.s4p) files or MATLAB data files (.mat). There is no need to specify this folder when setting a filename in a simulation configuration, so if one wants to use "A.s4p" from this folder as the through channel then use the following setting in the function:

simSettings.channel.fileNames.thru = 'A.s4p'

For NEXT and FEXT channels the scheme is similar but appended with an index starting from 1, examples are below. Note: the order of NEXT/FEXT channels has no effect on simulation.

simSettings.channel.fileNames.fext1 = 'C2M__Z100_IL14_WC_BOR_H_L_H_FEXT1.s4p'
simSettings.channel.fileNames.next4 = 'C2M__Z100_IL14_WC_BOR_H_L_H_NEXT4.s4p'
simSettings.channel.fileNames.next3 = 'C2M__Z100_IL14_WC_BOR_H_L_H_NEXT3.s4p'
simSettings.channel.fileNames.fext2 = 'C2M__Z100_IL14_WC_BOR_H_L_H_FEXT2.s4p'

Using Touchstone Files

No special preparations need to be taken to use standard Touchstone (.s4p) files with this program; provided the files contain valid data in the correct format.

Using MATLAB Data Files

Although not the usual method of describing a channel's properties, MATLAB-style data files can be used to describe the frequency responce of a channel from one end to the other. If one chooses to use this method to describe the behaviour of a channel then it needs to contain two vectors of equal length:

  1. frequency - Marks down the frequency value for a given response. Specified in Hz.
  2. response - Describes the response of the channel for a given frequency as a complex number.

(If either of these are missing or misspelled then the program will inform the user and close.)

The motivation for having this feature is to allow for the easy importing and tailoring of arbitrary channels using MATLAB or Octave to plot a response to a simple structure instead of synthesizing a complete Touchstone file.

Credit for Provided Channels

The channel descriptions distributed with this program and used in the examples were provided for research use by other researchers, credit for them is as follows.

"C2M_Z100_IL14_WC_BOR_H_L_H_" Files

Used in examples 0, 1, 3 and 4.

Samtec from their work: "100 GEL C2M Flyover Host Files: Tp0 to Tp2, with and without manufacturing variations, for losses of 9, 10, 11, 12, 13, and 14 dB Losses." IEEE 802.3ck 100 Gb/s per Lane Electrical Study Group. 18-May-2018.

The presentation itself is available here, all the channel files we used and the others they prepared for that presentation are in this dataset. They have additional channel file sets available on their group's page.

"TEC_Whisper27in_" Files

Used in example 2.

TE Connectivity from their work: "100 Gb/s Measured Backplane Channels" for the March 2011 IEEE 802 LMSC Plenary Session presented by Megha Shanbhag.

The presentation itself is available here, the channel files originate from this dataset. They are posted alongside other channel datasets as part of their task force's page.