Arrangement for compensating for non-linear distortion in an input signal to be digitized and an echo cancelling system comprising such a arrangement
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United States of America Patent
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May 24, 1988
Grant Date -
N/A
app pub date -
Mar 20, 1987
filing date -
Mar 28, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An arrangement for compensating for non-linear distortion in an input signal to be digitized, comprising an analogue-to-digital converter (2) for converting the input signal into an amplitude-time discrete output signal, means (3) for deriving a set of coefficients which are associated with an orthogonal signal representation of a signal related to the input signal, a memory (4) in which a Table with correction values is stored, means for addressing the memory for reading a correction value from the Table, each of the coefficients determining an address for the memory, means (5) for adding together the correction value and the analogue-to-digital converter output signal for providing a linearized signal, and an adaptive control loop (7,8,16,18) for substituting in the Table the new correction value for the correction value read.
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