Pulse or digital communications – Receivers – Automatic baseline or threshold adjustment
Reexamination Certificate
2005-04-12
2005-04-12
Luther, William (Department: 2667)
Pulse or digital communications
Receivers
Automatic baseline or threshold adjustment
C375S222000, C327S068000, C370S359000
Reexamination Certificate
active
06879644
ABSTRACT:
A method of automatically determining a peak level of a signal propagated on a carrier medium, such as for example POTS wiring, includes detecting a traversal of a noise threshold level by a data signal. The noise threshold level is determined relative to a noise floor. A determination is then made as to whether the data signal traverses a peak level within a predetermined time interval after the detection of the traversal of the noise threshold level. The peak level is then varied in accordance with the determination of whether the data signal traversed the peak level within the predetermined time interval. For example, should the data signal not traversed the peak level within the predetermined time interval, the peak level may be lowered. Alternatively, should the data signal traversed the peak level within the predetermined time interval, the peak level may be raised.
REFERENCES:
patent: 5091920 (1992-02-01), Ikeda et al.
patent: 5307379 (1994-04-01), Bergstrom et al.
patent: 6163580 (2000-12-01), Jackson et al.
Luther William
Smith-Hill and Bedell
Tut Systems, Inc.
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