WO2008148078A3 - Ofdm-based device and method for performing synchronization in the presence of interference signals - Google Patents
Ofdm-based device and method for performing synchronization in the presence of interference signals Download PDFInfo
- Publication number
- WO2008148078A3 WO2008148078A3 PCT/US2008/064839 US2008064839W WO2008148078A3 WO 2008148078 A3 WO2008148078 A3 WO 2008148078A3 US 2008064839 W US2008064839 W US 2008064839W WO 2008148078 A3 WO2008148078 A3 WO 2008148078A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ofdm
- values
- frequency offset
- based device
- fine frequency
- Prior art date
Links
Classifications
-
- 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
- H04L27/2657—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
- H04L27/2657—Carrier synchronisation
- H04L27/2659—Coarse or integer frequency offset determination and synchronisation
Abstract
An OFDM-based device and method for performing synchronization utilizes a time-domain preamble of an incoming OFDM-based signal to compute an estimated fine frequency offset. The computation of the estimated fine frequency offset involves multiplying values of the time-domain preamble with conjugates of corresponding values of a selected base station time-domain preamble, averaging the resulting multiplied values in predefined segments and self-correlating the resulting averaged values to derive a self-correlation value, which is used to compute the estimated fine frequency offset.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US93167307P | 2007-05-25 | 2007-05-25 | |
US60/931,673 | 2007-05-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008148078A2 WO2008148078A2 (en) | 2008-12-04 |
WO2008148078A3 true WO2008148078A3 (en) | 2009-12-30 |
Family
ID=40072316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2008/064839 WO2008148078A2 (en) | 2007-05-25 | 2008-05-27 | Ofdm-based device and method for performing synchronization in the presence of interference signals |
Country Status (3)
Country | Link |
---|---|
US (1) | US8134911B2 (en) |
TW (1) | TW200913592A (en) |
WO (1) | WO2008148078A2 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100982780B1 (en) | 2008-12-05 | 2010-09-20 | 경희대학교 산학협력단 | Carrier frequency offset estimation using range pointer for ofdm based wlan system |
US9762414B2 (en) * | 2009-02-04 | 2017-09-12 | Acorn Technologies, Inc. | Least squares channel identification for OFDM Systems |
US8761274B2 (en) * | 2009-02-04 | 2014-06-24 | Acorn Technologies, Inc. | Least squares channel identification for OFDM systems |
WO2011059068A1 (en) * | 2009-11-13 | 2011-05-19 | 日本電気株式会社 | Frequency offset estimation method and communication device, wireless communication system and program |
US8842790B2 (en) * | 2009-12-22 | 2014-09-23 | Intel Corporation | Methods and systems to synchronize network nodes |
CN101764780B (en) * | 2009-12-28 | 2015-04-01 | 北京中星微电子有限公司 | Method and device for time and frequency synchronization in orthogonal frequency division multiplexing |
CN102223322B (en) * | 2010-04-15 | 2014-11-05 | 中兴通讯股份有限公司 | Estimation method and apparatus for frequency offset |
CN102377705B (en) * | 2010-08-20 | 2016-09-14 | 英特赛尔美国股份有限公司 | Noise and interference elimination method |
US8548033B2 (en) | 2010-12-23 | 2013-10-01 | Microchip Technology Incorporated | Automatic frequency control under low signal-to-noise conditions |
CN102315908B (en) * | 2011-09-26 | 2014-01-22 | 华为技术有限公司 | Frequency offset estimation method and base station |
US9628095B1 (en) * | 2012-09-05 | 2017-04-18 | Altera Corporation | Parameterizable method for simulating PLL behavior |
WO2017004836A1 (en) * | 2015-07-09 | 2017-01-12 | 华为技术有限公司 | Data detection method and device |
US9538537B1 (en) * | 2015-08-11 | 2017-01-03 | Phasorlab, Inc. | Blind carrier synchronization method for OFDM wireless communication systems |
US10171278B2 (en) * | 2016-05-12 | 2019-01-01 | Cavium, Llc | Methods and apparatus for frequency offset estimation |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030058966A1 (en) * | 2001-09-24 | 2003-03-27 | Gilbert Jeffrey M. | Fine frequency offset estimation and calculation and use to improve communication system performance |
US20030152021A1 (en) * | 2001-09-24 | 2003-08-14 | Yi-Hsiu Wang | Post-fft scaling to reduce multiple effects |
US20050078649A1 (en) * | 2003-10-08 | 2005-04-14 | Tehrani Ardavan M. | Apparatus and method of multiple antenna receiver combining of high data rate wideband packetized wireless communication signals |
US20060233270A1 (en) * | 2005-03-25 | 2006-10-19 | Jae-Young Ahn | Method and apparatus for uplink carrier frequency synchronization and antenna weight vector estimation in OFDMA system having smart antenna |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69939310D1 (en) * | 1998-12-01 | 2008-09-25 | Samsung Electronics Co Ltd | DEVICE FOR FREQUENCY SYNCHRONIZATION OF AN OFDM / CDMA SYSTEM |
US7027429B2 (en) * | 2001-06-19 | 2006-04-11 | Flarion Technologies, Inc. | Method and apparatus for time and frequency synchronization of OFDM communication systems |
KR20050040988A (en) * | 2003-10-29 | 2005-05-04 | 삼성전자주식회사 | Communication method for frequency hopping ofdm based cellular system |
KR100621432B1 (en) * | 2004-04-21 | 2006-09-08 | 삼성전자주식회사 | Apparatus for channel estimations for mitigating inter-cell interference in multiple transmit and multiple receive antennas-orthogonal frequency division multiplexing cellular system and method thereof |
DE602006006160D1 (en) * | 2005-02-25 | 2009-05-20 | Koninkl Philips Electronics Nv | METHOD AND DEVICE FOR SYNCHRONIZING A WIRELESS RECEIVER |
TWI350679B (en) * | 2006-04-03 | 2011-10-11 | Realtek Semiconductor Corp | Frequency offset correction for an ultrawideband communication system |
KR100732382B1 (en) * | 2006-04-27 | 2007-06-27 | 주식회사 팬택 | Apparatus and method of obtaining a preamble in an orthogonal frequency division multiple access mobile terminal |
-
2008
- 2008-05-23 US US12/126,835 patent/US8134911B2/en active Active - Reinstated
- 2008-05-23 TW TW097119030A patent/TW200913592A/en unknown
- 2008-05-27 WO PCT/US2008/064839 patent/WO2008148078A2/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030058966A1 (en) * | 2001-09-24 | 2003-03-27 | Gilbert Jeffrey M. | Fine frequency offset estimation and calculation and use to improve communication system performance |
US20030152021A1 (en) * | 2001-09-24 | 2003-08-14 | Yi-Hsiu Wang | Post-fft scaling to reduce multiple effects |
US20050078649A1 (en) * | 2003-10-08 | 2005-04-14 | Tehrani Ardavan M. | Apparatus and method of multiple antenna receiver combining of high data rate wideband packetized wireless communication signals |
US20060233270A1 (en) * | 2005-03-25 | 2006-10-19 | Jae-Young Ahn | Method and apparatus for uplink carrier frequency synchronization and antenna weight vector estimation in OFDMA system having smart antenna |
Also Published As
Publication number | Publication date |
---|---|
US8134911B2 (en) | 2012-03-13 |
WO2008148078A2 (en) | 2008-12-04 |
TW200913592A (en) | 2009-03-16 |
US20080291893A1 (en) | 2008-11-27 |
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