The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 1993
Filed:
Mar. 12, 1991
Joseph W Lechleider, Mendham Township, Morristown, Morris County, NJ (US);
Bell Communications Research, Inc., Livingston, NJ (US);
Abstract
A communication system for coordinated transmission of signals from two data sources over a pair of transmission lines includes a central office transceiver and a remote transceiver terminating the corresponding ends of the pair of transmission lines. Each transceiver includes a transmitter with a complementary receiver. The signal amplitudes propagated on the lines are related to each other according to a prescribed relation that effects enhanced signal-to-noise ratio. The transmitter includes a set of amplification factors determined by the prescribed relation; similarly, the receiver also includes two sets of amplication factors to perform the dual to the transmitter operation. The transmitter incorporates a two-dimensional generalization to a conventional echo canceler, namely, an implementation to cancel both echo and near-end crosstalk interfering components. Also, the receiver incorporates a two-dimensional generalization to a conventional decision feedback equalizer, namely, an implementation to cancel both pre-cursor and post-cursor intersymbol interference as well as far-end crosstalk.