Dynamically adaptive equalizer system and method

Details Dynamically adaptive equalizer system and method Dynamically adaptive equalizer system and method

1992-08-10

1995-05-16

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

3647242, 333 18, H03H 730, H03K 5159

Patent

active

054167990

ABSTRACT:
An adaptive filter or equalizer for digital data communication includes, a first cascade circuit connected to operate as a digital finite impulse response (FIR) filter, the first cascade circuit having a first plurality of input taps for application of filter weighting signals thereto, a single input for samples of input data, and an output for filtered data. A second cascade circuit, which has the inverse canonical form, has a second plurality of input taps for receiving signal samples of input data, a single input for receiving error signals, and an output for yielding a succession of weighting signals. A sequencing circuit applies data signals to successive cascade stages of the second cascade circuit in a time sequence which is the reverse of that of the weight signals applied to the plurality of input taps of the first cascade circuit, such that the second cascade circuit functions as a weighting signal generator for the first cascade circuit. Storage registers at the inputs of the first and second cascade circuits are updated by weight and data signals, respectively, serve to multiplex application of single inputs to multiple cascade stages. An error signal is derived from the output of said first cascade circuit and applied to the error input of the second cascade circuit.

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Harris HSP43891, 2-Pgs., May 1991.

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