Unger model

The Unger Model is an empirical standard model for near-end crosstalk (NEXT) power spectra as experienced by communication systems over unshielded twisted pair (UTP).

Twisted pair cables are usually grouped together in a binder where they experience crosstalk. Based on empirical observations, Unger [1] proposed that, at the 1% worst case, the NEXT power spectra , due to a single disturber, can be bounded by

while the NEXT power spectra due to 49 disturbers (full binder) can be bounded by

References

  1. J. H. Unger, "Near-End Crosstalk Model for Line Code Studies", ECSA Contribution, T1D1.3/85-244, November 12, 1985.

See also


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