Digital adaptive receiver employing maximum-likelihood sequence

Details Digital adaptive receiver employing maximum-likelihood sequence Digital adaptive receiver employing maximum-likelihood sequence

1987-06-01

1989-12-05

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

371 43, 364807, H03D 104

Patent

active

048857572

ABSTRACT:
A maximum-likelihood sequence estimator receiver includes a matched filter connected to a digital transmission channel and a sampler for providing sampled signals output by the matched filter. The sampled signals are input to an analog neural network to provide high-speed outputs representative of the transmission channel signals. The neural network outputs are also provided as inputs to a coefficient estimator which produces coefficients for feedback to the matched filter. For time-varying transmission channel characteristics, the coefficient estimator provides a second coefficient output which is utilized for changing the interconnection strengths of the neural network connection matrix to offset the varying transmission channel characteristics.

REFERENCES:
patent: 4484338 (1984-11-01), Clark et al.
patent: 4660166 (1987-04-01), Hopfield
patent: 4701936 (1987-10-01), Clark et al.

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