Peak limiter for suppressing undesirable energy in a return path

Details Peak limiter for suppressing undesirable energy in a return path Peak limiter for suppressing undesirable energy in a return path

1997-06-17

1999-04-06

Lee, John D.

Optical waveguides

With optical coupler

Plural

359115, 359158, 359161, 359162, G02B 628

Patent

active

058928650

ABSTRACT:
A system for preventing the distortion of data signals in a return frequency band by a laser on a return path of bidirectional communication network. The distortion of data signals is prevented by minimizing strong noise energy in the return band. The return frequency band is divided into a lower return frequency band and an upper return frequency band. The lower return band contains frequencies overlapping a noise floor with strong noise signals. The splitting of the upper and lower return frequency bands allows the upper return frequency band to be unaffected by the strong noise signals. The distortion by the strong noise signals on data signals at adjacent frequencies is minimized by transforming signals in the lower return frequency band to another form of signals that are not affected by strong noise energy.

REFERENCES:
patent: 5153763 (1992-10-01), Pidgeon
patent: 5430569 (1995-07-01), Blauvelt et al.
patent: 5570219 (1996-10-01), Shibutani etal.
patent: 5719867 (1998-02-01), Borazjani
patent: 5745836 (1998-04-01), Williams
Published in the Proceedings of SPIE under the title of Broadband Access Systems, vol. 2917, p. 12, in a conference of Nov. 19-22, 1996 by Thomas Williams, "Plant Architectures for . . . HFC Networks", 9 pages.

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