Stmicroelectronics N.v.

Niklas Grip

Mikael Isaksson

Daniel Bengtsson

Lennart Olsson

Gunnar Bahlenberg

Magnus Johansson

Anders Isaksson

Goran Okvist

Tomas Stefansson

Hans Ohman

Lis-Marie Ljunggren

Sven-Rune Olofsson

Joachim Johansson

Sarah Kate Wilson

Per Odling

Richard Nilsson

Per Ola Borjesson

A RFI canceller, for use in a subscriber line system using multi-carrier modulation, measures a RFI disturbance in carriers falling within a band of frequencies causing the RFI. The RFI ingress into carriers outside the band of frequencies is estimated, and an error correcting signal derived from the estimation of the RFI ingress is subtracted from a received signal. The subscriber line system may be a VDSL system and the multi-carrier modulation may be DMT. The RFI canceller includes a demodulator for demodulating an incoming data stream to provide a first parallel data stream. A parallel to serial convertor converts the first parallel data stream to a first serial data stream. A digital to analogue convertor converts the first serial data stream to a first analogue signal. An analogue RFI canceller circuit combines the analogue signal with an analogue error correcting signal, to produce a second analogue signal. An analogue to digital convertor converts the second analogue signal to a second serial data signal. A serial to parallel convertor converts the second serial data stream to a second parallel data stream. A modulator modulates the second parallel data stream onto a multiplicity of carriers.

Subscriber line transmission systems

Growing community of inventors

Lulea, Sweden

Niklas Grip