GB201208244D0 - Preamble detection - Google Patents

Preamble detection

Info

Publication number
GB201208244D0
GB201208244D0 GBGB1208244.2A GB201208244A GB201208244D0 GB 201208244 D0 GB201208244 D0 GB 201208244D0 GB 201208244 A GB201208244 A GB 201208244A GB 201208244 D0 GB201208244 D0 GB 201208244D0
Authority
GB
United Kingdom
Prior art keywords
comparison
phase component
generate
signal
combined
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
GBGB1208244.2A
Other versions
GB2503869B (en
GB2503869A (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.)
Huawei Technologies Research and Development UK Ltd
Original Assignee
Neul Ltd
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 Neul Ltd filed Critical Neul Ltd
Priority to GB1208244.2A priority Critical patent/GB2503869B/en
Publication of GB201208244D0 publication Critical patent/GB201208244D0/en
Priority to PCT/EP2013/059737 priority patent/WO2013167739A1/en
Publication of GB2503869A publication Critical patent/GB2503869A/en
Application granted granted Critical
Publication of GB2503869B publication Critical patent/GB2503869B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation
    • H04L27/266—Fine or fractional frequency offset determination and synchronisation
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2662—Symbol synchronisation
    • H04L27/2663—Coarse synchronisation, e.g. by correlation
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2669—Details of algorithms characterised by the domain of operation
    • H04L27/2671—Time domain
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2675—Pilot or known symbols
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2681—Details of algorithms characterised by constraints
    • H04L27/2685—Speed of convergence
    • 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
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2681—Details of algorithms characterised by constraints
    • H04L27/2688—Resistance to perturbation, e.g. noise, interference or fading

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method for detecting the start of a frame in a signal comprises comparing a first section of the signal with a known sequence (preamble) to generate a first comparison including a first phase component and comparing a second section of the signal with the known sequence to generate a second comparison including a second phase component, the second phase component incorporating an additional rotation relative to the first phase component due to transmitter-receiver frequency mismatch. The second comparison is processed with the first comparison to generate a combined comparison that is representative of the second comparison but without the additional rotation. The processing of the second comparison with the first comparison may comprise multiplying the second comparison with the complex conjugate of the first comparison. Further combined comparisons may be generated and then coherently combined. The invention may be used in a communication network implementing the Weightless (RTM) protocol for machine communications.
GB1208244.2A 2012-05-11 2012-05-11 Preamble detection Active GB2503869B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1208244.2A GB2503869B (en) 2012-05-11 2012-05-11 Preamble detection
PCT/EP2013/059737 WO2013167739A1 (en) 2012-05-11 2013-05-10 Preamble detection in presence of carrier offset

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1208244.2A GB2503869B (en) 2012-05-11 2012-05-11 Preamble detection

Publications (3)

Publication Number Publication Date
GB201208244D0 true GB201208244D0 (en) 2012-06-20
GB2503869A GB2503869A (en) 2014-01-15
GB2503869B GB2503869B (en) 2018-09-05

Family

ID=46396848

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1208244.2A Active GB2503869B (en) 2012-05-11 2012-05-11 Preamble detection

Country Status (2)

Country Link
GB (1) GB2503869B (en)
WO (1) WO2013167739A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5579338A (en) * 1992-06-29 1996-11-26 Mitsubishi Denki Kabushiki Kaisha Spread spectrum receiver using partial correlations
US6310856B1 (en) * 1998-08-07 2001-10-30 Motorola, Inc. CDMA communications system having a searcher receiver and method therefor
KR100355376B1 (en) * 1999-12-15 2002-10-12 삼성전자 주식회사 Apparatus for acquisition for asynchronous wideband DS/CDMA signal
EP1545019A1 (en) * 2003-12-19 2005-06-22 Telefonaktiebolaget LM Ericsson (publ) GPS receiver using differential correlation
US7907679B2 (en) * 2007-01-12 2011-03-15 General Dynamics C4 Systems, Inc. Methods and systems for acquiring signals using coherent match filtering
US8139680B2 (en) * 2007-01-12 2012-03-20 General Dynamics C4 Systems, Inc. Signal acquisition methods and apparatus in wireless communication systems
GB0714581D0 (en) * 2007-07-26 2007-09-05 Cambridge Silicon Radio Ltd Synchronising a receiver to a signal having known structure
WO2011120212A1 (en) * 2010-03-29 2011-10-06 Murata Manufacturing Co., Ltd Method and apparatus for accurate time synchronization in wireless communication system
US8718119B2 (en) * 2011-11-10 2014-05-06 Raytheon Company Spread-carrier self-detecting code receiver with summed delay processing and methods for signal acquisition and detection

Also Published As

Publication number Publication date
GB2503869B (en) 2018-09-05
GB2503869A (en) 2014-01-15
WO2013167739A1 (en) 2013-11-14

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20170831 AND 20170906

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20210812 AND 20210818