WO2004114596A1 - Frame format decoder and training sequence generator for wireless lan networks - Google Patents
Frame format decoder and training sequence generator for wireless lan networks Download PDFInfo
- Publication number
- WO2004114596A1 WO2004114596A1 PCT/IB2004/050941 IB2004050941W WO2004114596A1 WO 2004114596 A1 WO2004114596 A1 WO 2004114596A1 IB 2004050941 W IB2004050941 W IB 2004050941W WO 2004114596 A1 WO2004114596 A1 WO 2004114596A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frame format
- receiver
- data
- training sequence
- bits
- Prior art date
Links
- 238000012549 training Methods 0.000 title claims abstract description 27
- 230000003044 adaptive effect Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 18
- 238000001228 spectrum Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000010363 phase shift Effects 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000009432 framing Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000001427 coherent effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002592 echocardiography Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
- H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/026—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse time characteristics modulation, e.g. width, position, interval
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- spreading of the signal across a wider frequency bandwidth results in comparatively lower power spectral density, so that other communication systems are less likely to suffer interference from the device that transmits the spread spectrum signal. It also makes the spread signal harder to detect and less susceptible to interference (i.e. harder to jam).
- the first stage of equalization is ISI cancellation and that involves taking the output of the symbol decisions and then subtracting the left over energy of the previous symbol from the current symbol before demodulation.
- the next stage in equalization is canceling the ICI interference and that requires a more complex process since the ICI depends on which of the 64 vectors is received.
- Data to be transmitted is encapsulated or "packed” into frames at the transmitter, and decapsulated or “unpacked” from the frames at the receiver.
- the packet preamble provides a mechanism for establishing synchronization (SYNC) between the packing and unpacking operations.
- SYNC synchronization
- the IEEE 802.1 lb standard for Wireless Local Area Networks describes two physical frame formats, namely the long frame format illustrated in Fig. 1 of the drawings and the optional short frame format illustrated in Fig. 2.
- the output of the descrambler 30 will consist of zeros (short frame format) or ones (long frame format) during the SYNC field.
- a counter 32 the number of consecutive zeros or ones is counted. Whe N consecutive zeros or ones are counted, the decoder 22 assumes that the frame format is of the short or long frame type respectively.
- N is an integer, and is a design parameter. For small N, the probability of a wrong decision is relatively great, whereas if Nis large, the probability of a wrong decision is relatively small but it takes more time to make the decision.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/561,856 US7680230B2 (en) | 2003-06-25 | 2004-06-21 | Frame format decoder and training sequence generator for wireless LAN networks |
JP2006516720A JP2007521727A (en) | 2003-06-25 | 2004-06-21 | Wireless LAN network frame format decoder and training sequence generator |
DE602004017468T DE602004017468D1 (en) | 2003-06-25 | 2004-06-21 | ENCODER FOR FRAME FORMAT AND TRAINING SEQUENCE GENERATOR FOR WIRELESS LOCAL AREA NETWORKS |
EP04737098A EP1642416B1 (en) | 2003-06-25 | 2004-06-21 | Frame format decoder and training sequence generator for wireless lan networks |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03101875 | 2003-06-25 | ||
EP03101875.7 | 2003-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004114596A1 true WO2004114596A1 (en) | 2004-12-29 |
Family
ID=33522405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2004/050941 WO2004114596A1 (en) | 2003-06-25 | 2004-06-21 | Frame format decoder and training sequence generator for wireless lan networks |
Country Status (9)
Country | Link |
---|---|
US (1) | US7680230B2 (en) |
EP (1) | EP1642416B1 (en) |
JP (1) | JP2007521727A (en) |
KR (1) | KR20060034240A (en) |
CN (1) | CN100546265C (en) |
AT (1) | ATE413040T1 (en) |
DE (1) | DE602004017468D1 (en) |
TW (1) | TW200507528A (en) |
WO (1) | WO2004114596A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7583595B2 (en) | 2005-03-31 | 2009-09-01 | Samsung Electronics Co., Ltd. | Data slot allocation method in distributed wireless personal area networks |
US8064414B2 (en) | 2005-12-13 | 2011-11-22 | Qualcomm, Incorporated | Range extension techniques for a wireless local area network |
US20150257106A1 (en) * | 2014-03-06 | 2015-09-10 | Apple Inc. | Wi-Fi Low Energy Preamble |
CN108123784A (en) * | 2016-08-26 | 2018-06-05 | 华为技术有限公司 | The method and apparatus of signal processing |
DE102015203508B4 (en) * | 2014-03-06 | 2019-07-25 | Apple Inc. | Wi-Fi preamble field of low energy |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8583995B2 (en) * | 2005-11-16 | 2013-11-12 | Qualcomm Incorporated | Multi-mode processor |
US8418040B2 (en) * | 2005-11-16 | 2013-04-09 | Qualcomm Incorporated | Method and apparatus for single carrier and OFDM sub-block transmission |
US8910027B2 (en) * | 2005-11-16 | 2014-12-09 | Qualcomm Incorporated | Golay-code generation |
US8429502B2 (en) * | 2005-11-16 | 2013-04-23 | Qualcomm Incorporated | Frame format for millimeter-wave systems |
IL203785A (en) | 2007-09-12 | 2014-07-31 | Qualcomm Inc | Capacity increasing devices and methods for wireless communication |
US8472497B2 (en) * | 2007-10-10 | 2013-06-25 | Qualcomm Incorporated | Millimeter wave beaconing with directional antennas |
CN101931593B (en) * | 2009-06-18 | 2013-12-11 | Tcl集团股份有限公司 | Channel equalization method and device |
WO2013081663A1 (en) * | 2011-12-02 | 2013-06-06 | Intel Corporation | Methods, systems, and apparatuses to enable short frames |
EP2690789A4 (en) * | 2012-01-11 | 2015-04-08 | Shenzhen Hac Telecom Technology Co Ltd | System and method for wireless communication |
WO2013162522A1 (en) * | 2012-04-24 | 2013-10-31 | Intel Corporation | Methods, systems and apparatuses for direct data frames |
JP2014235595A (en) | 2013-06-03 | 2014-12-15 | 株式会社リコー | Non-contact communication mode determination circuit, non-contact communication circuit, and ic card |
WO2015064945A1 (en) * | 2013-10-29 | 2015-05-07 | Samsung Electronics Co., Ltd. | A method and system using ternary sequences for simultaneous transmission to coherent and non-coherent recievers |
DE102015017324B4 (en) * | 2014-03-06 | 2023-12-21 | Apple Inc. | Low energy Wi-Fi preamble field |
WO2016115960A1 (en) | 2015-01-22 | 2016-07-28 | 华为技术有限公司 | Method, device and system for indicating transmission frame structures |
CN106209159B (en) * | 2016-07-18 | 2019-12-13 | 乐鑫信息科技(上海)股份有限公司 | data packet leader sequence and packet header, processing method thereof and data frame |
WO2018090741A1 (en) * | 2016-11-16 | 2018-05-24 | 华为技术有限公司 | Signal processing method and device |
US10292104B2 (en) * | 2017-08-21 | 2019-05-14 | Redpine Signals, Inc. | Quick decision preamble detector with hierarchical processing |
US11153129B1 (en) * | 2020-06-01 | 2021-10-19 | International Business Machines Corporation | Feedforward equalizer with programmable roaming taps |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0851603A2 (en) * | 1996-12-31 | 1998-07-01 | Lucent Technologies Inc. | System and method for spread spectrum code position modulation and wireless local area network employing the same |
EP1191730A1 (en) * | 2000-09-20 | 2002-03-27 | Lucent Technologies Inc. | Communication system and method with variable training means |
US20030147374A1 (en) * | 2002-02-07 | 2003-08-07 | Mao-Ching Chiu | Method and device for detecting preamble of wireless data frame |
WO2003084119A1 (en) * | 2002-03-28 | 2003-10-09 | Advanced Micro Devices, Inc. | Synchronization data detection unit and method |
WO2003094417A1 (en) * | 2002-05-03 | 2003-11-13 | Atheros Communications, Inc. | Dynamic preamble detection |
Family Cites Families (6)
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US5557614A (en) * | 1993-12-22 | 1996-09-17 | Vlsi Technology, Inc. | Method and apparatus for framing data in a digital transmission line |
US5504454A (en) * | 1995-01-30 | 1996-04-02 | Westinghouse Elec. Corp. | Demodulator for powerline carrier communications |
US5666366A (en) * | 1996-05-24 | 1997-09-09 | National Semiconductor Corporation | Inter-base synchronization technique for a TDMA communication system |
US6614864B1 (en) * | 1999-10-12 | 2003-09-02 | Itran Communications Ltd. | Apparatus for and method of adaptive synchronization in a spread spectrum communications receiver |
US20030161355A1 (en) * | 2001-12-21 | 2003-08-28 | Rocco Falcomato | Multi-mode framer and pointer processor for optically transmitted data |
US7403539B1 (en) * | 2002-10-09 | 2008-07-22 | Marvell International Ltd. | Clear channel assessment in wireless communications |
-
2004
- 2004-06-21 JP JP2006516720A patent/JP2007521727A/en active Pending
- 2004-06-21 EP EP04737098A patent/EP1642416B1/en not_active Not-in-force
- 2004-06-21 DE DE602004017468T patent/DE602004017468D1/en active Active
- 2004-06-21 KR KR1020057024840A patent/KR20060034240A/en not_active Application Discontinuation
- 2004-06-21 AT AT04737098T patent/ATE413040T1/en not_active IP Right Cessation
- 2004-06-21 CN CNB2004800176728A patent/CN100546265C/en not_active Expired - Fee Related
- 2004-06-21 US US10/561,856 patent/US7680230B2/en active Active
- 2004-06-21 WO PCT/IB2004/050941 patent/WO2004114596A1/en active Application Filing
- 2004-06-23 TW TW093118107A patent/TW200507528A/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0851603A2 (en) * | 1996-12-31 | 1998-07-01 | Lucent Technologies Inc. | System and method for spread spectrum code position modulation and wireless local area network employing the same |
EP1191730A1 (en) * | 2000-09-20 | 2002-03-27 | Lucent Technologies Inc. | Communication system and method with variable training means |
US20030147374A1 (en) * | 2002-02-07 | 2003-08-07 | Mao-Ching Chiu | Method and device for detecting preamble of wireless data frame |
WO2003084119A1 (en) * | 2002-03-28 | 2003-10-09 | Advanced Micro Devices, Inc. | Synchronization data detection unit and method |
WO2003094417A1 (en) * | 2002-05-03 | 2003-11-13 | Atheros Communications, Inc. | Dynamic preamble detection |
Non-Patent Citations (1)
Title |
---|
"Supplement to IEEE Standard for Information technology. Part 11: Wireless LAN Medium Access Control(MAC) and Physical Layer (PHY) specifications: Higher-Speed Physical Layer Extension in the 2.4 GHz Band", IEEE STD 802.11B-1999, XX, XX, 20 January 2000 (2000-01-20), pages 1 - 90, XP002189756 * |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7583595B2 (en) | 2005-03-31 | 2009-09-01 | Samsung Electronics Co., Ltd. | Data slot allocation method in distributed wireless personal area networks |
US8064414B2 (en) | 2005-12-13 | 2011-11-22 | Qualcomm, Incorporated | Range extension techniques for a wireless local area network |
JP2012114922A (en) * | 2005-12-13 | 2012-06-14 | Qualcomm Inc | Range extension techniques for wireless local area network |
US8712400B2 (en) | 2005-12-13 | 2014-04-29 | Qualcomm Incorporated | Range extension techniques for a wireless local area network |
US8792877B2 (en) | 2005-12-13 | 2014-07-29 | Qualcomm Incorporated | Range extension techniques for a wireless local area network |
US9681386B2 (en) | 2014-03-06 | 2017-06-13 | Apple Inc. | Wi-Fi low energy preamble |
US20150257106A1 (en) * | 2014-03-06 | 2015-09-10 | Apple Inc. | Wi-Fi Low Energy Preamble |
US20170245216A1 (en) * | 2014-03-06 | 2017-08-24 | Apple Inc. | Wi-Fi Low Energy Preamble |
US10206173B2 (en) | 2014-03-06 | 2019-02-12 | Apple Inc. | Wi-fi low energy preamble |
DE102015203508B4 (en) * | 2014-03-06 | 2019-07-25 | Apple Inc. | Wi-Fi preamble field of low energy |
US10849071B2 (en) | 2014-03-06 | 2020-11-24 | Apple Inc. | Wi-Fi low energy preamble |
CN108123784A (en) * | 2016-08-26 | 2018-06-05 | 华为技术有限公司 | The method and apparatus of signal processing |
CN108123784B (en) * | 2016-08-26 | 2021-05-18 | 华为技术有限公司 | Method and apparatus for signal processing |
Also Published As
Publication number | Publication date |
---|---|
KR20060034240A (en) | 2006-04-21 |
DE602004017468D1 (en) | 2008-12-11 |
TW200507528A (en) | 2005-02-16 |
US20070140296A1 (en) | 2007-06-21 |
EP1642416A1 (en) | 2006-04-05 |
US7680230B2 (en) | 2010-03-16 |
CN100546265C (en) | 2009-09-30 |
EP1642416B1 (en) | 2008-10-29 |
CN1809994A (en) | 2006-07-26 |
ATE413040T1 (en) | 2008-11-15 |
JP2007521727A (en) | 2007-08-02 |
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