Isaac Morgan

US Patent:

58451919, Dec 1, 1998

Filed:

Jul 25, 1996

Appl. No.:

8/686302

Inventors:

Isaac E. Morgan - Stone Mountain GA

Assignee:

AT&T Corp - Middletown NJ

International Classification:

H04N 7173

US Classification:

455 51

Abstract:

Ingress noise in a hybrid fiber-coax transmission system (10) may be reduced by employing asymmetric taps (30. sub. 1 '-30. sub. 8 ',) between a pair of line extenders (28--28) for attenuating downstream and upstream information by different weights. The downstream weights of the taps are selected to achieve a substantial constant power level at each tap for individual subscribers (14--14). The upstream attenuation of each tap is selected to allow for a nearly constant level of subscriber-generated information to be received at the line extender while the subscriber generated upstream information is supplied to the taps at a constant value that is maximized to reduce the effect of ingress noise.