Data receiving device with delayed equalization and retroactive

Details Data receiving device with delayed equalization and retroactive Data receiving device with delayed equalization and retroactive

1990-07-18

1992-10-27

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

3647242, 333 18, H03H 740

Patent

active

051596091

ABSTRACT:
The field of the invention is that of data processing modules placed in a receiver of a data transmission or emission network, and charged with the equalizing and time-pulse recovery of the received data, in order to furnish to the next elements of the chain of the receiver a clear signal with a clean and resynchronized clock phase.
The objective is to provide a device extending the limits of restoring the service in the case of strong disturbances of the channel.
According to the invention, the device comprises in particular a timepulse recovery circuit (42) arranged in retroactive relooping at the output of the digital equalizer (56) in order to control the said ADC (41) feeding the equalizer, means to stabilize the calculation of filtering coefficients, comprising means to control the interruption of the calculation of new filtering coefficients, according to a criterion of crossing of a threshold of satisfactory equalizing, and means (57) to control the resetting of the filtering coefficients, according to a criterion of crossing of a threshold of maximum operating deviation of the filtering module.

REFERENCES:
patent: 3978407 (1976-08-01), Forney et al.
patent: 4024342 (1977-05-01), Croisier et al.
patent: 4061978 (1977-12-01), Motley et al.
patent: 4550415 (1985-10-01), Debus et al.
patent: 4673979 (1987-06-01), Kobo et al.
patent: 4696015 (1987-09-01), Palicot et al.
patent: 4860310 (1989-08-01), Lamnabhi et al.
patent: 4872184 (1989-10-01), Yamaguchi et al.

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