Pulse or digital communications – Equalizers – Automatic
Patent
1995-09-28
1998-09-08
Vo, Don N.
Pulse or digital communications
Equalizers
Automatic
375233, 375317, 375350, 3647242, H03H 730, H03H 740
Patent
active
058056394
ABSTRACT:
An adaptive network includes a summation node for receiving an input signal and delivering an output signal. A decision unit receives the output signal of the summation node as an input signal and has an output for delivering an output signal being a differential signal between the input and output signals of the decision unit. An adaptive feedback branch receives the output signal of the decision unit and has status variables, coefficients and an output. A changeover switch unit couples the output of the feedback branch to the summation node. A monitoring unit monitors an error magnitude of the output signal of the decision unit. The monitoring unit triggers the changeover switch unit in the next clock cycle if a first signal value having an amplitude exceeding a certain threshold value appears, for causing the summation node to be acted upon by a digital zero signal, for setting the status variables of the feedback branch to zero and for freezing the coefficients of the feedback branch.
REFERENCES:
patent: 5481564 (1996-01-01), Kakuishi et al.
patent: 5499268 (1996-03-01), Takahashi
patent: 5524125 (1996-06-01), Tsujimoto
patent: 5581585 (1996-12-01), Takatori et al.
Publ. Introduction to Digital Signal Processing (Proakis et al.), pp. 858-877.
IEEE Publ. 1989, (Graf et al.), pp. 1808-1812, "Design and Performance of an All-Digital Adaptive . . . ".
Gazsi Lajos
Leeb Ferenc
Tonch Reiner
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
Vo Don N.
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