GB0615516D0 - Bit metric calculation for M-QAM with constellation labelling - Google Patents

Bit metric calculation for M-QAM with constellation labelling

Info

Publication number
GB0615516D0
GB0615516D0 GB0615516A GB0615516A GB0615516D0 GB 0615516 D0 GB0615516 D0 GB 0615516D0 GB 0615516 A GB0615516 A GB 0615516A GB 0615516 A GB0615516 A GB 0615516A GB 0615516 D0 GB0615516 D0 GB 0615516D0
Authority
GB
United Kingdom
Prior art keywords
qam
metric calculation
bit metric
constellation
labelling
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.)
Withdrawn
Application number
GB0615516A
Other versions
GB2440584A (en
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.)
BENZAIR KASSEM
Original Assignee
BENZAIR KASSEM
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 BENZAIR KASSEM filed Critical BENZAIR KASSEM
Priority to GB0615516A priority Critical patent/GB2440584A/en
Publication of GB0615516D0 publication Critical patent/GB0615516D0/en
Publication of GB2440584A publication Critical patent/GB2440584A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03178—Arrangements involving sequence estimation techniques
    • H04L25/03184—Details concerning the metric
    • H04L25/03197—Details concerning the metric methods of calculation involving metrics
    • 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
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
GB0615516A 2006-08-04 2006-08-04 Bit Metric Calculation for Gray Coded M-QAM using (piecewise) linear equations derived from Max-Log approximations Withdrawn GB2440584A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0615516A GB2440584A (en) 2006-08-04 2006-08-04 Bit Metric Calculation for Gray Coded M-QAM using (piecewise) linear equations derived from Max-Log approximations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0615516A GB2440584A (en) 2006-08-04 2006-08-04 Bit Metric Calculation for Gray Coded M-QAM using (piecewise) linear equations derived from Max-Log approximations

Publications (2)

Publication Number Publication Date
GB0615516D0 true GB0615516D0 (en) 2006-09-13
GB2440584A GB2440584A (en) 2008-02-06

Family

ID=37027243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0615516A Withdrawn GB2440584A (en) 2006-08-04 2006-08-04 Bit Metric Calculation for Gray Coded M-QAM using (piecewise) linear equations derived from Max-Log approximations

Country Status (1)

Country Link
GB (1) GB2440584A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8340202B2 (en) 2010-03-11 2012-12-25 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for efficient soft modulation for gray-mapped QAM symbols
CN103840882B (en) * 2012-11-21 2018-09-28 中兴通讯股份有限公司 The transmission of fiber optic network, reception, communication system and signal modulator approach
US11395353B2 (en) 2020-01-23 2022-07-19 Rockwell Collins, Inc. System and method for 4G automatic link establishment protocol enhancement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6594318B1 (en) * 1999-12-02 2003-07-15 Qualcomm Incorporated Method and apparatus for computing soft decision input metrics to a turbo decoder
US6834088B2 (en) * 2001-03-12 2004-12-21 Motorola, Inc. Method and apparatus for calculating bit log-likelihood ratios for QAM signals
WO2003075528A1 (en) * 2002-03-07 2003-09-12 Telefonaktiebolaget L M Ericsson (Publ) Soft value calculation for multilevel signals

Also Published As

Publication number Publication date
GB2440584A (en) 2008-02-06

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)