Pulse or digital communications – Repeaters – Testing
Patent
1992-05-01
1994-12-27
Bocure, Tesfaldet
Pulse or digital communications
Repeaters
Testing
375 12, H04L 2503
Patent
active
053772300
ABSTRACT:
In many data communications systems, crosstalk is a significant channel impairment. If all transmitters in such a system must utilize the same shaping function, and if the transmitters are furthermore nominally Nyquist bandlimited, then the crosstalk generally cannot be mitigated by equalization. However, by extending the bandwidth of the transmitted signal in accordance with the principles of the invention, the resultant crosstalk can be efficiently mitigated by equalization. This extended bandwidth signal is produced by adding significant additional energy outside the traditional Nyquist band.
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patent: 4881241 (1989-11-01), Pommier et al.
patent: 5095495 (1992-03-01), Golden
patent: 5163044 (1992-11-01), Golden
"Exploitation of Spectral Redundancy in Cyclostationary Signals", by William A. Gardner, IEEE Signal Processing Magazine, Apr. 1991.
"Minimum Mean Square Euqalization in Cyclostationary and Stationary Interference-Analysis and Subscriber Line Calculations", by Brent R. Petersen, et al., IEEE Journal on Selected Areas in Communications, vol. 9, No. 6, Aug. 1991.
"Suppression of Near-and Far-End Crosstalk by Linear Pre-and Post-Filtering", by Michael L. Honig, et al., IEEE Journal On Selected Areas in Communications, vol. 10, No. 3, Apr. 1992.
"Equalization in Cyclostationary Interference" by Brent R. Petersen, PhD. Thesis submitted to the Faculty of Graduate Studies and Research, Ottawa-Carleton Institute for Electrical Engineering, Ottawa, Ontario, Canada, Oct. 31, 1991.
AT&T Corp.
Bocure Tesfaldet
Opalach Joseph J.
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