公开(公告)号：DE69811716T2

公开(公告)日：2003-12-04

申请号：DE69811716

申请日：1998-11-11

Applicant: ST MICROELECTRONICS NV

Inventor： ISAKSSON MIKAEL ,  JOHANSSON MAGNUS ,  OLSSON LENNART ,  STEFANSSON TOMAS ,  OEHMAN HANS ,  BAHLENBERG GUNNAR ,  ISAKSSON ANDERS ,  OEKVIST GOERAN ,  LJUNGGREN LIS-MARIE ,  BENGTSSON DANIEL ,  OLOFSSON SVEN-RUNE ,  JOHANSSON JOACHIM ,  BOERJESSON OLA ,  GRIP NIKLAS ,  NILSSON RICHARD ,  SJOEBERG FRANK ,  WILSON SARAH ,  OEDLING PER

IPC: H04B3/32 ,  H04B1/12 ,  H04B15/00 ,  H04L25/10 ,  H04L27/26

Abstract: 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.

公开(公告)号：DE69910015D1

公开(公告)日：2003-09-04

申请号：DE69910015

申请日：1999-05-11

Applicant: ST MICROELECTRONICS NV

Inventor： BOERJESSON OLA ,  ISAKSSON MIKAEL ,  OEDLING PER ,  BENGTSSON DANIEL ,  BAHLENBERG GUNNAR ,  JOHANSSON MAGNUS ,  OLSSON LENNART ,  OEKVIST GOERAN

IPC: H03M1/12

Abstract: A circuit, for digitizing an analogue signal includes an analogue to digital converter, a clip processor adapted to estimate a value for clipped digital signal samples, and a buffer adapted to dynamically store a plurality of digitized samples produced by the analogue to digital converter. The clip processor is adapted to read digitized samples from the buffer and replace clipped digitized samples with the estimated values, thereby mitigating the effects of clipping in an output of the circuit.

公开(公告)号：DE69910015T2

公开(公告)日：2004-04-15

申请号：DE69910015

申请日：1999-05-11

Applicant: ST MICROELECTRONICS NV

Inventor： BOERJESSON OLA ,  ISAKSSON MIKAEL ,  OEDLING PER ,  BENGTSSON DANIEL ,  BAHLENBERG GUNNAR ,  JOHANSSON MAGNUS ,  OLSSON LENNART ,  OEKVIST GOERAN

IPC: H03M1/12

Abstract: A circuit, for digitizing an analogue signal includes an analogue to digital converter, a clip processor adapted to estimate a value for clipped digital signal samples, and a buffer adapted to dynamically store a plurality of digitized samples produced by the analogue to digital converter. The clip processor is adapted to read digitized samples from the buffer and replace clipped digitized samples with the estimated values, thereby mitigating the effects of clipping in an output of the circuit.

公开(公告)号：DE69811716D1

公开(公告)日：2003-04-03

申请号：DE69811716

申请日：1998-11-11

Applicant: ST MICROELECTRONICS NV

Inventor： ISAKSSON MIKAEL ,  JOHANSSON MAGNUS ,  OLSSON LENNART ,  STEFANSSON TOMAS ,  OEHMAN HANS ,  BAHLENBERG GUNNAR ,  ISAKSSON ANDERS ,  OEKVIST GOERAN ,  LJUNGGREN LIS-MARIE ,  BENGTSSON DANIEL ,  OLOFSSON SVEN-RUNE ,  JOHANSSON JOACHIM ,  BOERJESSON OLA ,  GRIP NIKLAS ,  NILSSON RICHARD ,  SJOEBERG FRANK ,  WILSON SARAH ,  OEDLING PER

IPC: H04B3/32 ,  H04B1/12 ,  H04B15/00 ,  H04L25/10 ,  H04L27/26

Abstract: 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.