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WO2009041671A1 - Ｃｆｏおよびｉ／ｑインバランスの補正係数の算出方法とそれを用いた補正方法とパイロット信号の送信方法 - Google Patents

Ｃｆｏおよびｉ／ｑインバランスの補正係数の算出方法とそれを用いた補正方法とパイロット信号の送信方法 Download PDF

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Publication number
WO2009041671A1
WO2009041671A1 PCT/JP2008/067571 JP2008067571W WO2009041671A1 WO 2009041671 A1 WO2009041671 A1 WO 2009041671A1 JP 2008067571 W JP2008067571 W JP 2008067571W WO 2009041671 A1 WO2009041671 A1 WO 2009041671A1
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WO
WIPO (PCT)
Prior art keywords
cfo
pilot signal
imbalance
signal transmission
same
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.)
Ceased
Application number
PCT/JP2008/067571
Other languages
English (en)
French (fr)
Inventor
Hai Lin
Katsumi Yamashita
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.)
Osaka Metropolitan University
Original Assignee
Osaka Prefecture University PUC
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 Osaka Prefecture University PUC filed Critical Osaka Prefecture University PUC
Priority to US12/679,581 priority Critical patent/US20100208783A1/en
Priority to EP08832924.8A priority patent/EP2194665B1/en
Priority to JP2009534448A priority patent/JP5344701B2/ja
Priority to CN200880109427A priority patent/CN101809910A/zh
Publication of WO2009041671A1 publication Critical patent/WO2009041671A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference 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
    • 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
    • H04L27/32—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0083—Signalling arrangements
    • H04L2027/0089—In-band signals
    • H04L2027/0091—Continuous 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26134—Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Radio Transmission System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

　ＯＦＤＭ方式の通信システムは、周波数の有効利用およびマルチパスへの耐性を高めることが出来るため、現在実用が進んでいる。しかし、ＯＦＤＭ方式はスペクトルの重なった多重化信号であるため、ＣＦＯが存在する場合にはキャリア間の直行性が崩れ、誤り率特性が劣化する。また、Ｉ／Ｑ信号の復調においても、π／２位相の異なる局発振信号を得るのが難しいため、Ｉ／Ｑ信号間で不平衡が生じ、誤り率特性が劣化する。 本発明では、新しいパイロット信号を提案し、ＣＦＯやＩ／Ｑインバランスの補正のための補正値を解析的に求め、それを用いてこれらの歪を補正する方法を提供する。また、本発明はＯＦＤＭ方式に関わらずパイロット信号のあるプロトコルにはすべて適用できる。
PCT/JP2008/067571 2007-09-27 2008-09-27 Ｃｆｏおよびｉ／ｑインバランスの補正係数の算出方法とそれを用いた補正方法とパイロット信号の送信方法 Ceased WO2009041671A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US12/679,581 US20100208783A1 (en) 2007-09-27 2008-09-27 Method for calculating cfo and i/q imbalance compensation coefficients, compensation method using the same, and method for transmitting pilot signal
EP08832924.8A EP2194665B1 (en) 2007-09-27 2008-09-27 CFO and I/Q imbalance estimation and compensation
JP2009534448A JP5344701B2 (ja) 2007-09-27 2008-09-27 Ｃｆｏおよびｉ／ｑインバランスの補正係数の算出方法とそれを用いた補正方法とパイロット信号の送信方法
CN200880109427A CN101809910A (zh) 2007-09-27 2008-09-27 Cfo和i/q不均衡的校正系数的算出方法、使用该校正系数的校正方法、以及导频信号的发送方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-252736 2007-09-27
JP2007252736 2007-09-27

Publications (1)

Publication Number Publication Date
WO2009041671A1 true WO2009041671A1 (ja) 2009-04-02

Family

ID=40511551

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/067571 Ceased WO2009041671A1 (ja) 2007-09-27 2008-09-27 Ｃｆｏおよびｉ／ｑインバランスの補正係数の算出方法とそれを用いた補正方法とパイロット信号の送信方法

Country Status (6)

Country Link
US (1) US20100208783A1 (ja)
EP (1) EP2194665B1 (ja)
JP (1) JP5344701B2 (ja)
KR (1) KR20100058584A (ja)
CN (1) CN101809910A (ja)
WO (1) WO2009041671A1 (ja)

Cited By (4)

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WO2010061532A1 (ja) * 2008-11-01 2010-06-03 公立大学法人大阪府立大学 Ｏｆｄｍ通信システムにおけるアナログ損失のハイブリッドドメイン補償パラメータの求め方と補償方法
JP2011503946A (ja) * 2007-10-31 2011-01-27 アイメック 相補ゴーレイシーケンス対を用いて送受信器非理想性を決定し補償するための方法
JP2012044550A (ja) * 2010-08-20 2012-03-01 Mitsubishi Electric Corp 送信装置、受信装置および通信システム
JP2022524455A (ja) * 2020-02-03 2022-05-02 ▲騰▼▲訊▼科技（深▲セン▼）有限公司 側波帯抑圧方法、装置、コンピュータ機器及びコンピュータプログラム

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CN102279402B (zh) * 2011-03-18 2013-08-07 哈尔滨工业大学 一种gnss数据/导频混合信号的频域相干联合捕获方法
US8971465B2 (en) * 2012-03-30 2015-03-03 Qualcomm Incorporated Receiver-side estimation of and compensation for signal impairments
US9143365B2 (en) 2013-01-30 2015-09-22 Qualcomm Incorporated Channel estimation using averaging and interpolation
GB2537800B (en) * 2014-12-22 2018-05-30 Imagination Tech Ltd IQ imbalance estimator
US11012273B1 (en) * 2019-12-31 2021-05-18 Hughes Network Systems, Llc Compensating for frequency-dependent I-Q phase imbalance
US20210229952A1 (en) * 2020-01-24 2021-07-29 Otis Elevator Company Elevator car communication system
US11627531B2 (en) * 2020-11-29 2023-04-11 Silicon Laboratories Inc. WLAN receiver early power down based on center frequency offset detection
CN112888025B (zh) * 2021-01-12 2022-11-11 深圳市极致汇仪科技有限公司 一种基于扩展带宽对接收的wifi数据处理的方法及系统
US11722981B2 (en) * 2021-07-29 2023-08-08 Cisco Technology, Inc. Re-estimating clock offset for frequency-selective wireless channels

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JPH11243434A (ja) * 1998-02-26 1999-09-07 Matsushita Electric Ind Co Ltd 変調方式とそれを用いた無線通信システム
JP2000316031A (ja) * 1999-04-30 2000-11-14 Advantest Corp 直交変調信号評価方法及びこの評価方法を用いた直交変調信号評価装置
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JP2000316031A (ja) * 1999-04-30 2000-11-14 Advantest Corp 直交変調信号評価方法及びこの評価方法を用いた直交変調信号評価装置
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See also references of EP2194665A4

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011503946A (ja) * 2007-10-31 2011-01-27 アイメック 相補ゴーレイシーケンス対を用いて送受信器非理想性を決定し補償するための方法
WO2010061532A1 (ja) * 2008-11-01 2010-06-03 公立大学法人大阪府立大学 Ｏｆｄｍ通信システムにおけるアナログ損失のハイブリッドドメイン補償パラメータの求め方と補償方法
JP5147089B2 (ja) * 2008-11-01 2013-02-20 公立大学法人大阪府立大学 Ｏｆｄｍ通信システムにおけるアナログ損失のハイブリッドドメイン補償パラメータの求め方と補償方法
JP2012044550A (ja) * 2010-08-20 2012-03-01 Mitsubishi Electric Corp 送信装置、受信装置および通信システム
JP2022524455A (ja) * 2020-02-03 2022-05-02 ▲騰▼▲訊▼科技（深▲セン▼）有限公司 側波帯抑圧方法、装置、コンピュータ機器及びコンピュータプログラム
JP7258406B2 (ja) 2020-02-03 2023-04-17 ▲騰▼▲訊▼科技（深▲セン▼）有限公司 側波帯抑圧方法、装置、コンピュータ機器及びコンピュータプログラム
US12126407B2 (en) 2020-02-03 2024-10-22 Tencent Technology (Shenzhen) Company Limited Sideband suppression method and apparatus, computer device, and storage medium

Also Published As

Publication number Publication date
EP2194665A4 (en) 2012-09-12
EP2194665B1 (en) 2013-04-24
JPWO2009041671A1 (ja) 2011-01-27
KR20100058584A (ko) 2010-06-03
CN101809910A (zh) 2010-08-18
JP5344701B2 (ja) 2013-11-20
US20100208783A1 (en) 2010-08-19
EP2194665A1 (en) 2010-06-09

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