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:
Feb. 24, 2004
Filed:
May. 17, 1999
Wayne Raymond Getchell, Nepean, CA;
Nortel Networks Limited, St. Laurent, CA;
Abstract
A method and apparatus for transmit power control in a subscriber loop for high frequency data services are described. Transmit signal power levels are maintained at minimum levels for achieving acceptable communications between a transmitter and a receiver. Transmit signal power levels are adjusted dynamically on a link-by-link basis by employing command controllable transmit power attenuators at the transmitters. The transmit power attenuators are controlled by transmit signal power controllers which issue commands to the transmit power attenuators. Excess transmit power is avoided and parasitic signal coupling between communication links is reduced. The advantages are cross-talk reduction, longer loop length and higher data rates.