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GB2355164B - Demodulator circuit - Google Patents

Demodulator circuit

Info

Publication number
GB2355164B
GB2355164B GB9923763A GB9923763A GB2355164B GB 2355164 B GB2355164 B GB 2355164B GB 9923763 A GB9923763 A GB 9923763A GB 9923763 A GB9923763 A GB 9923763A GB 2355164 B GB2355164 B GB 2355164B
Authority
GB
United Kingdom
Prior art keywords
demodulator circuit
demodulator
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB9923763A
Other versions
GB9923763D0 (en
GB2355164A (en
Inventor
Jonathan Parker
Matthew James Collins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oak Technology Inc
Conexant Systems LLC
Original Assignee
Oak Technology Inc
Conexant Systems LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oak Technology Inc, Conexant Systems LLC filed Critical Oak Technology Inc
Priority to GB9923763A priority Critical patent/GB2355164B/en
Publication of GB9923763D0 publication Critical patent/GB9923763D0/en
Priority to PCT/US2000/040993 priority patent/WO2001026318A2/en
Priority to EP00977260A priority patent/EP1224784A2/en
Publication of GB2355164A publication Critical patent/GB2355164A/en
Priority to US10/105,731 priority patent/US7106810B2/en
Application granted granted Critical
Publication of GB2355164B publication Critical patent/GB2355164B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—DC level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/067—DC level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing soft decisions, i.e. decisions together with an estimate of reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Quality & Reliability (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Time-Division Multiplex Systems (AREA)
GB9923763A 1999-10-07 1999-10-07 Demodulator circuit Expired - Fee Related GB2355164B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB9923763A GB2355164B (en) 1999-10-07 1999-10-07 Demodulator circuit
PCT/US2000/040993 WO2001026318A2 (en) 1999-10-07 2000-09-26 Demodulator circuit for demapping a multi-carrier signal using channel state information
EP00977260A EP1224784A2 (en) 1999-10-07 2000-09-26 Demodulator circuit for demapping a multi-carrier signal using channel state information
US10/105,731 US7106810B2 (en) 1999-10-07 2002-03-22 Method and apparatus for a demodulator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9923763A GB2355164B (en) 1999-10-07 1999-10-07 Demodulator circuit

Publications (3)

Publication Number Publication Date
GB9923763D0 GB9923763D0 (en) 1999-12-08
GB2355164A GB2355164A (en) 2001-04-11
GB2355164B true GB2355164B (en) 2004-06-09

Family

ID=10862311

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9923763A Expired - Fee Related GB2355164B (en) 1999-10-07 1999-10-07 Demodulator circuit

Country Status (3)

Country Link
EP (1) EP1224784A2 (en)
GB (1) GB2355164B (en)
WO (1) WO2001026318A2 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7106810B2 (en) 1999-10-07 2006-09-12 Matthew James Collins Method and apparatus for a demodulator circuit
ATE333744T1 (en) 2000-12-28 2006-08-15 Conexant Systems Inc MULTI CARRIER DEMODULATOR
GB2370952B (en) * 2001-01-05 2003-04-09 British Broadcasting Corp Improvements in channel state measurement and in discriminating digital values from a received signal suitable for use with OFDM signals
GB0110907D0 (en) * 2001-05-03 2001-06-27 British Broadcasting Corp Improvements in decoders for many carrier signals, in particular in DVB-T recievers
US7308050B2 (en) 2001-06-08 2007-12-11 Broadcom Corporation Detection and mitigation of temporary impairments in a communications channel
US7570576B2 (en) * 2001-06-08 2009-08-04 Broadcom Corporation Detection and mitigation of temporary (bursts) impairments in channels using SCDMA
KR20030017886A (en) * 2001-08-23 2003-03-04 한국전자통신연구원 Method for calculating soft bit values for decoding per a bit unit and communication system using the same
US7773699B2 (en) * 2001-10-17 2010-08-10 Nortel Networks Limited Method and apparatus for channel quality measurements
IL162191A0 (en) * 2001-11-29 2005-11-20 Qualcomm Inc Method and apparatus for determining the log-likelihood ratio with precoding
US7236548B2 (en) 2001-12-13 2007-06-26 Koninklijke Philips Electronics N.V. Bit level diversity combining for COFDM system
KR100441510B1 (en) * 2002-02-01 2004-07-23 삼성전자주식회사 The appartus for correcting error of data using channel state information
DE102004025826A1 (en) * 2004-05-24 2005-12-22 Micronas Gmbh Method for recovering a bit sequence from QPSK or QAM symbols
US8331465B2 (en) 2005-08-23 2012-12-11 Apple Inc. Adaptive two-dimensional channel interpolation
EP2043314A1 (en) 2007-09-25 2009-04-01 Thomson Licensing, Inc. A self-adaptive frequency interpolator for use in a multi-carrier receiver
CN103188176B (en) * 2011-12-31 2016-03-02 中国电子科技集团公司第五十研究所 The method of single-frequency or arrowband interference effect is reduced in ofdm system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013378A2 (en) * 1995-10-01 1997-04-10 Geotek Communications, Inc. Apparatus and method for determining and using channel state information
GB2319148A (en) * 1996-09-27 1998-05-13 Plessey Telecomm Noise level determination in a quadrature amplitude modulated signal
WO1998027681A2 (en) * 1996-12-18 1998-06-25 Koninklijke Philips Electronics N.V. Transmission system and recording system having a simplified symbol detector
GB2340353A (en) * 1998-05-09 2000-02-16 Lg Electronics Inc Method and device for demapping digital video data
GB2342546A (en) * 1998-10-01 2000-04-12 British Broadcasting Corp Measuring channel state from a received signal and discriminating digital values from a received signal, suitable for use in COFDM

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134635A (en) * 1990-07-30 1992-07-28 Motorola, Inc. Convolutional decoder using soft-decision decoding with channel state information
US5229767A (en) * 1991-09-05 1993-07-20 Motorola, Inc. Decoder for convolutionally encoded information

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013378A2 (en) * 1995-10-01 1997-04-10 Geotek Communications, Inc. Apparatus and method for determining and using channel state information
GB2319148A (en) * 1996-09-27 1998-05-13 Plessey Telecomm Noise level determination in a quadrature amplitude modulated signal
WO1998027681A2 (en) * 1996-12-18 1998-06-25 Koninklijke Philips Electronics N.V. Transmission system and recording system having a simplified symbol detector
GB2340353A (en) * 1998-05-09 2000-02-16 Lg Electronics Inc Method and device for demapping digital video data
GB2342546A (en) * 1998-10-01 2000-04-12 British Broadcasting Corp Measuring channel state from a received signal and discriminating digital values from a received signal, suitable for use in COFDM

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Park M.-Y et al, "A demapping method using the pilots in COFDM system", IEEE Transactions on Consumer Electronics, vol. 44, no. 3, August 1998, pp1150-1153, see whole document *

Also Published As

Publication number Publication date
WO2001026318A2 (en) 2001-04-12
GB9923763D0 (en) 1999-12-08
WO2001026318A3 (en) 2001-12-06
GB2355164A (en) 2001-04-11
EP1224784A2 (en) 2002-07-24

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Legal Events

Date Code Title Description
COOA Change in applicant's name or ownership of the application
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20061007