CN1682509A - 多载波发射系统中同相及正交分支间不对称前导信号的评估及均衡 - Google Patents
多载波发射系统中同相及正交分支间不对称前导信号的评估及均衡 Download PDFInfo
- Publication number
- CN1682509A CN1682509A CN03821375.3A CN03821375A CN1682509A CN 1682509 A CN1682509 A CN 1682509A CN 03821375 A CN03821375 A CN 03821375A CN 1682509 A CN1682509 A CN 1682509A
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- China
- Prior art keywords
- prime
- centerdot
- distortion
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- 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.)
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- 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
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
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- 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
-
- 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
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
- H04L27/3863—Compensation for quadrature error in the received signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0016—Stabilisation of local oscillators
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
Claims (12)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002141676 DE10241676A1 (de) | 2002-09-09 | 2002-09-09 | Präambel zur Schätzung und Entzerrung von Unsymmetrien zwischen Inphase- und Quadraturzweig in Mehrträger-Übertragungssystemen |
DE10241676.1 | 2002-09-09 | ||
PCT/DE2003/002815 WO2004025918A1 (de) | 2002-09-09 | 2003-08-22 | Präambel zur schätzung und entzerrung von unsymmetrien zwischen inphase- und quadraturzweig in mehrträger-übertragungssystemen |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1682509A true CN1682509A (zh) | 2005-10-12 |
CN1682509B CN1682509B (zh) | 2011-12-21 |
Family
ID=31724544
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN03821375.3A Expired - Fee Related CN1682509B (zh) | 2002-09-09 | 2003-08-22 | 多载波发射系统中同相及正交分支间不对称前导信号的评估及均衡方法 |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1537711B1 (zh) |
CN (1) | CN1682509B (zh) |
DE (2) | DE10241676A1 (zh) |
WO (1) | WO2004025918A1 (zh) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101627599A (zh) * | 2007-03-09 | 2010-01-13 | 高通股份有限公司 | 使用无偏训练序列的正交不平衡估计 |
CN101584171B (zh) * | 2006-03-24 | 2012-08-29 | Lg电子株式会社 | 在无线通信系统中配置前导以支持数据符号传输的方法和结构 |
CN101202727B (zh) * | 2006-12-14 | 2013-03-13 | 北京三星通信技术研究有限公司 | 子载波干扰自抵消导引符号的构造方法 |
US8526543B2 (en) | 2007-03-09 | 2013-09-03 | Qualcomm Incorporated | Quadrature imbalance estimation using unbiased training sequences |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8081695B2 (en) | 2007-03-09 | 2011-12-20 | Qualcomm, Incorporated | Channel estimation using frequency smoothing |
US8290083B2 (en) | 2007-03-09 | 2012-10-16 | Qualcomm Incorporated | Quadrature imbalance mitigation using unbiased training sequences |
RU2458474C2 (ru) * | 2007-03-09 | 2012-08-10 | Квэлкомм Инкорпорейтед | Уменьшение квадратурного дисбаланса с использованием несмещенных обучающих последовательностей |
JP5290209B2 (ja) * | 2007-03-09 | 2013-09-18 | クゥアルコム・インコーポレイテッド | 直交変調回転トレーニング・シーケンス |
DE602008003301D1 (de) | 2008-04-11 | 2010-12-16 | Ericsson Telefon Ab L M | Verfahren und Anordnung zur Einschätzung des IQ-Ungleichgewichts |
CN101582872B (zh) * | 2008-05-15 | 2013-03-06 | 北京六合万通微电子技术股份有限公司 | 一种ofdm接收机幅相偏差校正方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6185251B1 (en) * | 1998-03-27 | 2001-02-06 | Telefonaktiebolaget Lm Ericsson | Equalizer for use in multi-carrier modulation systems |
US7177372B2 (en) * | 2000-12-21 | 2007-02-13 | Jian Gu | Method and apparatus to remove effects of I-Q imbalances of quadrature modulators and demodulators in a multi-carrier system |
-
2002
- 2002-09-09 DE DE2002141676 patent/DE10241676A1/de not_active Withdrawn
-
2003
- 2003-08-22 DE DE50302309T patent/DE50302309D1/de not_active Expired - Lifetime
- 2003-08-22 WO PCT/DE2003/002815 patent/WO2004025918A1/de active IP Right Grant
- 2003-08-22 EP EP03794795A patent/EP1537711B1/de not_active Expired - Fee Related
- 2003-08-22 CN CN03821375.3A patent/CN1682509B/zh not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101584171B (zh) * | 2006-03-24 | 2012-08-29 | Lg电子株式会社 | 在无线通信系统中配置前导以支持数据符号传输的方法和结构 |
CN101202727B (zh) * | 2006-12-14 | 2013-03-13 | 北京三星通信技术研究有限公司 | 子载波干扰自抵消导引符号的构造方法 |
CN101627599A (zh) * | 2007-03-09 | 2010-01-13 | 高通股份有限公司 | 使用无偏训练序列的正交不平衡估计 |
CN101627599B (zh) * | 2007-03-09 | 2012-12-12 | 高通股份有限公司 | 使用无偏训练序列的正交不平衡估计 |
US8428175B2 (en) | 2007-03-09 | 2013-04-23 | Qualcomm Incorporated | Quadrature modulation rotating training sequence |
US8526543B2 (en) | 2007-03-09 | 2013-09-03 | Qualcomm Incorporated | Quadrature imbalance estimation using unbiased training sequences |
Also Published As
Publication number | Publication date |
---|---|
WO2004025918A1 (de) | 2004-03-25 |
DE50302309D1 (de) | 2006-04-13 |
EP1537711B1 (de) | 2006-01-25 |
CN1682509B (zh) | 2011-12-21 |
DE10241676A1 (de) | 2004-03-18 |
EP1537711A1 (de) | 2005-06-08 |
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C06 | Publication | ||
PB01 | Publication | ||
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SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: INTEL MOBILE COMMUNICATIONS LTD. Free format text: FORMER OWNER: INTEL MOBILE COMMUNICATIONS TECHNOLOGY LTD. Effective date: 20120529 Owner name: INTEL MOBILE COMMUNICATIONS TECHNOLOGY LTD. Free format text: FORMER OWNER: INFENNIAN TECHNOLOGIES AG Effective date: 20120529 |
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C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20120529 Address after: Neubiberg, Germany Patentee after: Intel Mobile Communications GmbH Address before: Munich, Germany Patentee before: INFINEON TECHNOLOGIES AG Effective date of registration: 20120529 Address after: Neubiberg, Germany Patentee after: Intel Mobile Communications GmbH Address before: Neubiberg, Germany Patentee before: Intel Mobile Communications GmbH |
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C56 | Change in the name or address of the patentee | ||
CP01 | Change in the name or title of a patent holder |
Address after: Neubiberg, Germany Patentee after: Intel Mobile Communications GmbH Address before: Neubiberg, Germany Patentee before: Intel Mobile Communications GmbH |
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20170822 |
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CF01 | Termination of patent right due to non-payment of annual fee |