Method for asymmetrically attenuating signals in a transmission

Details Method for asymmetrically attenuating signals in a transmission Method for asymmetrically attenuating signals in a transmission

1996-07-25

1998-12-01

Grant, Chris

Telecommunications

Interference signal transmission

455 31, 348 12, 348 6, H04N 7173

Patent

active

058451919

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.

REFERENCES:
patent: 4520508 (1985-05-01), Reichert, Jr.
patent: 4633202 (1986-12-01), Basile et al.
patent: 4982440 (1991-01-01), Dufresne et al.
patent: 5408259 (1995-04-01), Warwick
patent: 5581801 (1996-12-01), Spriester et al.

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