公开(公告)号：SE9601989D0

公开(公告)日：1996-05-24

申请号：SE9601989

申请日：1996-05-24

Applicant: TELIA AB

Inventor： ISAKSSON MIKAEL

IPC: H04J20060101 ,  H04J

公开(公告)号：SE9601986D0

公开(公告)日：1996-05-24

申请号：SE9601986

申请日：1996-05-24

Applicant: TELIA AB

Inventor： ISAKSSON MIKAEL

IPC: H04L20060101 ,  H04L

公开(公告)号：SE502656C2

公开(公告)日：1995-12-04

申请号：SE9404121

申请日：1994-11-29

Applicant: TELIA AB

Inventor： ENGSTROEM BO ,  ISAKSSON MIKAEL ,  LARSSON ROGER ,  OLOFSSON SVEN-RUNE ,  OLSSON LENNART ,  UNNEBAECK MICHAEL ,  OEQVIST GOERAN

IPC: H04B7/26 ,  H04L7/08 ,  H04L27/26

Abstract: PCT No. PCT/SE95/01382 Sec. 371 Date Aug. 20, 1997 Sec. 102(e) Date Aug. 20, 1997 PCT Filed Nov. 21, 1995 PCT Pub. No. WO96/17455 PCT Pub. Date Jun. 6, 1996A method of a mobile radio system for synchronization a transmitter and receiver. The system relates to MC/DS-CDMA-system. In the system information is transmitted digitally in frames. For that purpose a data channel, a pilot channel and a synchronization channel are created. In the data channel the data blocks D0, D1, D2 etc are separated by a guard space DELTA . In the pilot channel, respective the synchronization channel, the information is arranged in blocks which are synchronous with each other. The repeating distance, A, of the pilot channel, corresponds to the length of one of the data blocks D0, D1, D2 etc. The repeating distance for the synchronization channel is S, corresponding to a number of blocks in the data channel. In the synchronization channel information is introduced into the blocks which indicates their relation to the data channel. The method in this way allows an identification of the position of the pilot channel, which indicates the position of the synchronization channel, at which a decoding of the information of the the synchronization channel appoints the position of the data channel.

公开(公告)号：SE9500743D0

公开(公告)日：1995-03-01

申请号：SE9500743

申请日：1995-03-01

Applicant: TELIA AB

Inventor： ISAKSSON MIKAEL ,  ENGSTROEM BO

IPC: H04L27/26

公开(公告)号：SE9404121D0

公开(公告)日：1994-11-29

申请号：SE9404121

申请日：1994-11-29

Applicant: TELIA AB

Inventor： ENGSTROEM BO ,  ISAKSSON MIKAEL ,  LARSSON ROGER ,  OLOFSSON SVEN-RUNE ,  OLSSON LENNART ,  UNNEBAECK MICHAEL ,  OEQVIST GOERAN

IPC: H04B7/26 ,  H04L7/08 ,  H04L27/26

Abstract: PCT No. PCT/SE95/01382 Sec. 371 Date Aug. 20, 1997 Sec. 102(e) Date Aug. 20, 1997 PCT Filed Nov. 21, 1995 PCT Pub. No. WO96/17455 PCT Pub. Date Jun. 6, 1996A method of a mobile radio system for synchronization a transmitter and receiver. The system relates to MC/DS-CDMA-system. In the system information is transmitted digitally in frames. For that purpose a data channel, a pilot channel and a synchronization channel are created. In the data channel the data blocks D0, D1, D2 etc are separated by a guard space DELTA . In the pilot channel, respective the synchronization channel, the information is arranged in blocks which are synchronous with each other. The repeating distance, A, of the pilot channel, corresponds to the length of one of the data blocks D0, D1, D2 etc. The repeating distance for the synchronization channel is S, corresponding to a number of blocks in the data channel. In the synchronization channel information is introduced into the blocks which indicates their relation to the data channel. The method in this way allows an identification of the position of the pilot channel, which indicates the position of the synchronization channel, at which a decoding of the information of the the synchronization channel appoints the position of the data channel.

公开(公告)号：SE9400116D0

公开(公告)日：1994-01-18

申请号：SE9400116

申请日：1994-01-18

Applicant: TELIA AB

Inventor： ISAKSSON MIKAEL

IPC: H04L27/26

Abstract: PCT No. PCT/SE94/01266 Sec. 371 Date Aug. 22, 1996 Sec. 102(e) Date Aug. 22, 1996 PCT Filed Dec. 30, 1994 PCT Pub. No. WO95/19671 PCT Pub. Date Jul. 20, 1995A method and an arrangement for synchronization in OFDM modulation. Frequency errors of an IF clock and a sampling clock are controlled by estimating the deviation of the sampling clock and, respectively, the IF clock for two subcarriers with different frequencies. According to the invention, the frequencies are chosen symmetrically around zero and the absolute phase errors are detected for both subcarriers. Timing errors and phase errors are formed from the absolute phase errors in order to generate two control signals. The first control signal is formed from the deviation of the sampling clock and the timing error for controlling the sampling clock while the second control signal is formed from the deviation of the IF clock and the phase error for controlling the IF clock.

公开(公告)号：DE69533142T2

公开(公告)日：2005-07-07

申请号：DE69533142

申请日：1995-11-21

Applicant: TELIA AB

Inventor： ENGSTROEM BO ,  ISAKSSON MIKAEL ,  LARSSON ROGER ,  OLOFSSON SVEN-RUNE ,  UNNEBAECK MICHAEL ,  OEQVIST GOERAN ,  OESTBERG CHRISTER ,  OLSSON LENNART

IPC: H04B7/26 ,  H04L7/08 ,  H04L27/26

Abstract: PCT No. PCT/SE95/01382 Sec. 371 Date Aug. 20, 1997 Sec. 102(e) Date Aug. 20, 1997 PCT Filed Nov. 21, 1995 PCT Pub. No. WO96/17455 PCT Pub. Date Jun. 6, 1996A method of a mobile radio system for synchronization a transmitter and receiver. The system relates to MC/DS-CDMA-system. In the system information is transmitted digitally in frames. For that purpose a data channel, a pilot channel and a synchronization channel are created. In the data channel the data blocks D0, D1, D2 etc are separated by a guard space DELTA . In the pilot channel, respective the synchronization channel, the information is arranged in blocks which are synchronous with each other. The repeating distance, A, of the pilot channel, corresponds to the length of one of the data blocks D0, D1, D2 etc. The repeating distance for the synchronization channel is S, corresponding to a number of blocks in the data channel. In the synchronization channel information is introduced into the blocks which indicates their relation to the data channel. The method in this way allows an identification of the position of the pilot channel, which indicates the position of the synchronization channel, at which a decoding of the information of the the synchronization channel appoints the position of the data channel.

公开(公告)号：DE69624395D1

公开(公告)日：2002-11-28

申请号：DE69624395

申请日：1996-02-23

Applicant: TELIA AB

Inventor： ISAKSSON MIKAEL ,  ENGSTROEM BO

IPC: H04L27/26 ,  H04L5/06

公开(公告)号：EE200000243A

公开(公告)日：2001-06-15

申请号：EEP200000243

申请日：1998-11-11

Applicant: TELIA AB

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

IPC: H04B1/12 ,  H04B15/00 ,  H04B3/32 ,  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：EE200000183A

公开(公告)日：2001-04-16

申请号：EEP200000183

申请日：1998-10-30

Applicant: TELIA AB

Inventor： BAHLENBERG GUNNAR ,  BENGTSSON DANIEL ,  HAAKANSSON SIWERT ,  ISAKSSON ANDERS ,  ISAKSSON LARS-AAKE ,  ISAKSSON MIKAEL ,  JOHANSSON MAGNUS ,  LAHTI MAURITZ ,  LJUNGGREN LIS-MARI ,  LUNDBERG HANS ,  NORDSTROEM TOMAS ,  OLSSON LENNART ,  OLOFSSON SVEN-RUNE ,  STEFANSSON TOMAS ,  OEMAN HANS ,  OEKVIST GOERAN ,  OEDLING PER ,  DENTGEN PETRA ,  SJOEBERG FRANK

IPC: H04J11/00 ,  H04B3/02 ,  H04B3/50 ,  H04L5/02 ,  H04L5/14 ,  H04L5/06