Interference reduction in telecommunications systems
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United States of America Patent
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Nov 3, 1998
Grant Date -
N/A
app pub date -
Oct 28, 1996
filing date -
Nov 9, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
Interference on a differential signal received at a first input to a digital data system processor is minimised or cancelled by summing a weighted portion of a local field signal with the differential signal. The local field signal may be a common-mode signal from the same line as the differential signal received at a second input. Weight may be a complex weight which shifts the local field signal in amplitude and phase. A weight control signal is derived from a comparison processor which compares the processed outputs of signal processors. Signal processors are preferably Discrete Multi-tone processors. Several iterations of this technique may be performed to establish an accurate weighting value.
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