Method and circuit arrangement for offset correction in a TDMA r

Details Method and circuit arrangement for offset correction in a TDMA r Method and circuit arrangement for offset correction in a TDMA r

1993-01-14

1997-09-02

Bocure, Tesfaldet

Pulse or digital communications

Receivers

Automatic baseline or threshold adjustment

327307, H04L 2506

Patent

active

056639880

ABSTRACT:
The levels of received time-division multiple access (TDMA) signals may vary widely from section to section. In DC-coupled amplifier circuits, the received signals are distorted by offset voltages. Conventional correcting or balancing methods use control mechanisms which do not allow for level variations or offset drift and tend to result in miscompensation of individual signal sections. Other methods depend on time intervals defined in the received signal and having a known average value. It is the object of the invention to provide a correcting method and a circuit arrangement for carrying out the same which achieve a self-adjusting, not widely varying (floating) correction value, thus avoiding miscompensation. This is accomplished by selecting the individual time slots in a comparator with the aid of limit value.

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Cupo et al., "Adaptive Carrier Recovery Systems for Digital Data Communications Receivers." IEEE Journal on Selected Areas in Comm. vol. 7. No. 9. Dec. 1989 pp. 1328-1339.
"Instrumentation & Techniques--Automated Offset Compensation for DC Biopotential Measurements", T. Collura et al, Behavior Research Methods, Instruments & Computers 1990, 22(1), 13-20.

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