Centering multi-level data

Details Centering multi-level data Centering multi-level data

1989-05-26

1992-09-15

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

307264, 328164, H04L 2506

Patent

active

051484498

ABSTRACT:
There is provided a scheme for centering data prior to detection. It comprises: determining carrier frequency error, and pre-adjusting the data detection process to compensate for that error throughout the ensuing data detection. This scheme for reliable multi-level data detection further comprises: upon detection of carrier presence, determining carrier frequency error, gating a voltage associated with the frequency error to the differential amplification process to establish common mode rejection and compensating for that error throughout the ensuing multi-level data detection, and then analog-to-digital conversion of the differentially amplified multi-level data. A scheme for computationally centering the subsequent data detected to compensate for the error is also provided.

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patent: 4821292 (1989-04-01), Childress
patent: 4873702 (1989-10-01), Chiu
patent: 4897857 (1990-01-01), Wakatsuki et al.
patent: 4910753 (1990-03-01), Wakatsuki et al.

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