CA2265745A1 - Method and apparatus for performing decoding of codes at variable data rates - Google Patents

Method and apparatus for performing decoding of codes at variable data rates

Info

Publication number
CA2265745A1
CA2265745A1 CA002265745A CA2265745A CA2265745A1 CA 2265745 A1 CA2265745 A1 CA 2265745A1 CA 002265745 A CA002265745 A CA 002265745A CA 2265745 A CA2265745 A CA 2265745A CA 2265745 A1 CA2265745 A1 CA 2265745A1
Authority
CA
Canada
Prior art keywords
frame
decoded
crc
present
bits
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.)
Granted
Application number
CA002265745A
Other languages
French (fr)
Other versions
CA2265745C (en
Inventor
Jeremy M. Stein
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.)
Qualcomm Inc
Original Assignee
Qualcomm Incorporated
Jeremy M. Stein
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 Qualcomm Incorporated, Jeremy M. Stein filed Critical Qualcomm Incorporated
Publication of CA2265745A1 publication Critical patent/CA2265745A1/en
Application granted granted Critical
Publication of CA2265745C publication Critical patent/CA2265745C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/3738—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35 with judging correct decoding
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/3776—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35 using a re-encoding step during the decoding process
    • 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
    • H04L1/0046—Code rate detection or code type detection
    • 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
    • H04L1/0061—Error detection codes

Abstract

The present invention is a novel and improved method and apparatus for decoding a frame of digital data which contains redundant information provided to validate the decoding operation. In the present invention, a frame of data contains information bits and cyclic redundancy check (CRC) bits. The received frame is decoded and a check is conducted by CRC check (84) to determine whether the CRC
bits correspond correctly for the decoded information bits. If the decoded frame passes the CRC test process, the decoded frame is provided to the user. However, if the decoded frame does not pass the CRC test, then at least one additional decoding process is performed on the received frame. In the first exemplary embodiment of the present invention, if the CRC test is failed, a noise vector of a predetermined set of noise vectors generated by noise generator (80) is summed with the received frame and the resultant frame is decoded for a second time. In the second exemplary embodiment of the present invention, when the CRC test fails, a set of the received symbols are replaced with symbol erasure indications by erasure generator (162).
CA002265745A 1996-09-11 1997-09-11 Method and apparatus for performing decoding of codes at variable data rates Expired - Fee Related CA2265745C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/712,065 US5917837A (en) 1996-09-11 1996-09-11 Method and apparatus for performing decoding of codes with the use of side information associated with the encoded data
US08/712,065 1996-09-11
PCT/US1997/017821 WO1998011670A1 (en) 1996-09-11 1997-09-11 Method and apparatus for performing decoding of codes at variable data rates

Publications (2)

Publication Number Publication Date
CA2265745A1 true CA2265745A1 (en) 1998-03-19
CA2265745C CA2265745C (en) 2006-01-31

Family

ID=24860644

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002265745A Expired - Fee Related CA2265745C (en) 1996-09-11 1997-09-11 Method and apparatus for performing decoding of codes at variable data rates

Country Status (10)

Country Link
US (1) US5917837A (en)
EP (1) EP1023778B1 (en)
JP (1) JP3404049B2 (en)
KR (1) KR100513172B1 (en)
AT (1) ATE288151T1 (en)
AU (1) AU4743797A (en)
CA (1) CA2265745C (en)
DE (1) DE69732380T2 (en)
HK (1) HK1031486A1 (en)
WO (1) WO1998011670A1 (en)

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KR100234026B1 (en) * 1997-02-14 1999-12-15 김영환 Dc data transfer unit
JPH11163961A (en) * 1997-11-26 1999-06-18 Matsushita Electric Ind Co Ltd Method for judging transmission rate and its device
US6647071B2 (en) * 1998-11-06 2003-11-11 Texas Instruments Incorporated Method and apparatus for equalization and tracking of coded digital communications signals
JP3239870B2 (en) * 1998-12-28 2001-12-17 日本電気株式会社 Data error correction system
US6674807B1 (en) * 1999-01-21 2004-01-06 Samsung Electronics Co., Ltd. Communication apparatus and method for a CDMA communication system
US6378106B1 (en) * 1999-05-28 2002-04-23 Lucent Technologies Inc. Viterbi decoding using single-wrong-turn correction
FI107676B (en) 1999-06-21 2001-09-14 Nokia Mobile Phones Ltd Method and arrangement for utilizing a particular approach in signal management to convey information
US7080307B2 (en) * 2000-03-02 2006-07-18 Kawasaki Steel Corporation Error correction decoder with correction of lowest soft decisions
US6480827B1 (en) * 2000-03-07 2002-11-12 Motorola, Inc. Method and apparatus for voice communication
US6760699B1 (en) * 2000-04-24 2004-07-06 Lucent Technologies Inc. Soft feature decoding in a distributed automatic speech recognition system for use over wireless channels
US7065159B2 (en) * 2001-03-14 2006-06-20 Lucent Technologies Inc. Compensation based bit-error-rate estimation for convolutionally encoded transmissions in wireless systems
US20040010746A1 (en) * 2002-07-10 2004-01-15 Lucas L. Victor Forward error correction system for wireless communications
US7047475B2 (en) * 2003-02-04 2006-05-16 Hewlett-Packard Development Company, L.P. CRC encoding scheme for conveying status information
US7809090B2 (en) * 2005-12-28 2010-10-05 Alcatel-Lucent Usa Inc. Blind data rate identification for enhanced receivers
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748626A (en) * 1987-01-28 1988-05-31 Racal Data Communications Inc. Viterbi decoder with reduced number of data move operations
US4845714A (en) * 1987-06-08 1989-07-04 Exabyte Corporation Multiple pass error correction process and apparatus for product codes
US5023889A (en) * 1988-05-31 1991-06-11 California Institute Of Technology Trellis coded multilevel DPSK system with doppler correction for mobile satellite channels
US5056117A (en) * 1989-08-07 1991-10-08 At&T Bell Laboratories Decision feedback equalization with trellis coding
US5208816A (en) * 1989-08-18 1993-05-04 At&T Bell Laboratories Generalized viterbi decoding algorithms
CA2020899C (en) * 1989-08-18 1995-09-05 Nambirajan Seshadri Generalized viterbi decoding algorithms
US5416787A (en) * 1991-07-30 1995-05-16 Kabushiki Kaisha Toshiba Method and apparatus for encoding and decoding convolutional codes
JP2683665B2 (en) * 1991-11-27 1997-12-03 日本電気株式会社 Maximum likelihood sequence estimator
CA2113941A1 (en) * 1993-01-25 1994-07-26 Andrew J. Macdonald Error correcting decoder and decoding method for receivers in digital cellular communications systems
US5396516A (en) * 1993-02-22 1995-03-07 Qualcomm Incorporated Method and system for the dynamic modification of control paremeters in a transmitter power control system
US5673291A (en) * 1994-09-14 1997-09-30 Ericsson Inc. Simultaneous demodulation and decoding of a digitally modulated radio signal using known symbols
US5781565A (en) * 1994-09-09 1998-07-14 Sony Corporation Data recording/reproducing method, data reproducing apparatus and recording medium
US5577053A (en) * 1994-09-14 1996-11-19 Ericsson Inc. Method and apparatus for decoder optimization
US5802105A (en) * 1994-11-30 1998-09-01 Qualcomm Incorporated Method and apparatus for testing a digital communication channel

Also Published As

Publication number Publication date
DE69732380D1 (en) 2005-03-03
KR100513172B1 (en) 2005-09-08
EP1023778B1 (en) 2005-01-26
JP3404049B2 (en) 2003-05-06
ATE288151T1 (en) 2005-02-15
KR20000036044A (en) 2000-06-26
HK1031486A1 (en) 2001-06-15
JP2002501682A (en) 2002-01-15
CA2265745C (en) 2006-01-31
US5917837A (en) 1999-06-29
EP1023778A1 (en) 2000-08-02
WO1998011670A1 (en) 1998-03-19
DE69732380T2 (en) 2006-03-30
AU4743797A (en) 1998-04-02

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