Pulse or digital communications – Equalizers – Automatic
Patent
1997-11-14
2000-03-07
Chin, Stephen
Pulse or digital communications
Equalizers
Automatic
375222, 375231, 375233, H03H 730
Patent
active
06034993&
ABSTRACT:
An apparatus and method for adaptively equalizing a signal received from a remote transmitter. The equalizer includes a filter having an output and a decision circuit coupled to the filter output. In addition, the equalizer has a reference coupled to the decision circuit. The reference includes a model of a non-linear characteristic of a remote transmitter. The method relates to adaptively equalizing a signal received from a remote transmitter. The method includes the step of receiving a signal corresponding to a predetermined reference level from the remote transmitter. Next, the received signal level is filtered to remove linear error terms. The next step of the method includes measuring a non-linear error term associated with the received and filtered signal. The measured non-linear error term may then be stored and used to make improved decisions on data signals transmitted from the remote transmitter.
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patent: 5539774 (1996-07-01), Nobakht et al.
Kohonen et al., "Combining Linear Equalization and Self-Organizing Adaptation in Dynamic Discrete-Signal Detection", International Joint Conference on Neural Networks (IJCNN), vol. I, 17, Jun. 1990, San Diego, pp. 223-228.
Norrell Andrew L.
Walsh Dale M.
3Com Corporation
Chin Stephen
Fan Chieh M.
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