Interference reduction in telecommunications systems

Details Interference reduction in telecommunications systems Interference reduction in telecommunications systems

1996-10-28

1998-11-03

Chin, Wellington

Pulse or digital communications

Systems using alternating or pulsating current

Antinoise or distortion

370201, 370282, 379406, 379410, H04K 102

Patent

active

058320326

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.

REFERENCES:
patent: 4186349 (1980-01-01), Gordy et al.
patent: 4270223 (1981-05-01), Marston
patent: 5047736 (1991-09-01), Ghose
patent: 5410750 (1995-04-01), Cantwell et al.

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