DE602004006537T2 - Modulation und demodulation von ofdm-signalen - Google Patents

Modulation und demodulation von ofdm-signalen Download PDF

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Publication number
DE602004006537T2
DE602004006537T2 DE602004006537T DE602004006537T DE602004006537T2 DE 602004006537 T2 DE602004006537 T2 DE 602004006537T2 DE 602004006537 T DE602004006537 T DE 602004006537T DE 602004006537 T DE602004006537 T DE 602004006537T DE 602004006537 T2 DE602004006537 T2 DE 602004006537T2
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DE
Germany
Prior art keywords
complex
symbols
ofdm
dft
subcarrier
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.)
Expired - Lifetime
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DE602004006537T
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German (de)
English (en)
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DE602004006537D1 (de
Inventor
Simeon Furrer
Jens Jelitto
Wolfgang Schott
Beat Weiss
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International Business Machines Corp
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International Business Machines Corp
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Publication date
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Publication of DE602004006537D1 publication Critical patent/DE602004006537D1/de
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Publication of DE602004006537T2 publication Critical patent/DE602004006537T2/de
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Expired - Lifetime legal-status Critical Current

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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
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
    • 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
    • H04L27/2649—Demodulators
    • H04L27/26524—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation

Landscapes

  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
DE602004006537T 2004-01-06 2004-11-19 Modulation und demodulation von ofdm-signalen Expired - Lifetime DE602004006537T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04405006 2004-01-06
EP04405006 2004-01-06
PCT/IB2004/003799 WO2005076557A1 (en) 2004-01-06 2004-11-19 Modulation and demodulation of ofdm signals

Publications (2)

Publication Number Publication Date
DE602004006537D1 DE602004006537D1 (de) 2007-06-28
DE602004006537T2 true DE602004006537T2 (de) 2008-01-31

Family

ID=34833821

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602004006537T Expired - Lifetime DE602004006537T2 (de) 2004-01-06 2004-11-19 Modulation und demodulation von ofdm-signalen

Country Status (7)

Country Link
US (1) US20090323510A1 (https=)
EP (1) EP1702445B1 (https=)
JP (1) JP4410801B2 (https=)
CN (1) CN1902876B (https=)
AT (1) ATE362683T1 (https=)
DE (1) DE602004006537T2 (https=)
WO (1) WO2005076557A1 (https=)

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US7933344B2 (en) 2006-04-25 2011-04-26 Mircosoft Corporation OFDMA based on cognitive radio
US8189621B2 (en) 2006-05-12 2012-05-29 Microsoft Corporation Stack signaling to application with lack of requested bandwidth
DE602007012880D1 (de) * 2006-06-12 2011-04-14 Nxp Bv Polarsignalgenerator
WO2008001269A2 (en) * 2006-06-28 2008-01-03 Nxp B.V. Phase-to- frequency conversion for polar transmitters
US8320474B2 (en) * 2006-12-06 2012-11-27 Qualcomm Incorporated Digital frequency hopping in multi-band OFDM
US8144793B2 (en) 2006-12-12 2012-03-27 Microsoft Corporation Cognitive multi-user OFDMA
US7693428B2 (en) * 2007-02-27 2010-04-06 Celight, Inc. Optical orthogonal frequency division multiplexed communications with nonlinearity compensation
US7929623B2 (en) 2007-03-30 2011-04-19 Microsoft Corporation FEC in cognitive multi-user OFDMA
US7970085B2 (en) 2007-05-08 2011-06-28 Microsoft Corporation OFDM transmission and reception for non-OFDMA signals
FR2919085B1 (fr) * 2007-07-17 2011-06-17 Thales Sa Procede et dispositif d'analyse frequentielle de signaux radioelectriques en temps reel
US8374130B2 (en) 2008-01-25 2013-02-12 Microsoft Corporation Orthogonal frequency division multiple access with carrier sense
US8855087B2 (en) 2008-12-18 2014-10-07 Microsoft Corporation Wireless access point supporting control by multiple applications
CN101616104B (zh) * 2009-07-27 2011-12-07 北京天碁科技有限公司 正交频分复用系统的信道估计方法和装置
CN101741801B (zh) * 2009-11-04 2013-05-01 西安空间无线电技术研究所 一种32路并行数据dft的实现结构
KR101733489B1 (ko) 2010-01-17 2017-05-24 엘지전자 주식회사 무선 통신 시스템에서 제어 정보의 전송 방법 및 장치
WO2011126246A2 (ko) * 2010-04-04 2011-10-13 엘지전자 주식회사 무선 통신 시스템에서 제어 정보의 전송 방법 및 장치
CN102833012B (zh) * 2011-06-17 2014-11-26 鼎桥通信技术有限公司 多载波发射系统中的下行和上行数字中频自检方法
JP2013026901A (ja) * 2011-07-22 2013-02-04 Fujitsu Ltd 無線通信装置及び無線通信方法
US8824580B2 (en) * 2012-08-13 2014-09-02 Telefonaktiebolaget L M Ericsson (Publ) Communicating over a desired tone in the presence of interference having an unknown magnitude that is substantially constant
CN104854569B (zh) * 2012-11-06 2018-01-05 加利福尼亚大学董事会 用于多频带串行器解串器i/o电路的自跟踪方案
CN103986679A (zh) * 2013-02-07 2014-08-13 芯迪半导体科技（上海）有限公司 Ofdm收发器的同相和正交相信号传播时延补偿电路
EP2835926B1 (en) * 2013-08-05 2019-06-12 Alcatel Lucent Transmitter apparatus for conditioning a multicarrier signal, network node, method for conditioning a multicarrier signal, and computer program thereof
US11336496B2 (en) * 2014-10-02 2022-05-17 Stmicroelectronics Sa Real time OFDM transmission system
US9998315B2 (en) * 2016-03-08 2018-06-12 Blackberry Limited Method and apparatus for I-Q decoupled OFDM modulation and demodulation
US10212014B2 (en) * 2016-11-03 2019-02-19 Blackberry Limited Communication with I-Q decoupled OFDM modulation
CN106932492B (zh) * 2017-03-13 2019-06-04 南京航空航天大学 一种基于ofdm信号的超声目标检测方法
CN108965184B (zh) * 2017-05-25 2021-08-17 中兴通讯股份有限公司 一种离散多音频调制复用系统及方法
EP3537679B1 (en) * 2018-03-09 2021-02-24 Nokia Technologies Oy Multi-window fast convolution processing
DE102018119278B4 (de) * 2018-08-08 2020-04-02 Infineon Technologies Ag Verfahren und vorrichtungen für die verarbeitung eines ofdm-radarsignals
US11240082B1 (en) * 2019-04-10 2022-02-01 Arctan, Inc. Methods and systems for modulating and de modulating data
CN112054981B (zh) * 2020-08-17 2022-07-15 西安理工大学 一种实正交相移键控调制解调方法
CN120825375A (zh) * 2024-04-15 2025-10-21 中兴通讯股份有限公司 调制符号处理方法、第一通信节点、第二通信节点及介质

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1273794B (it) * 1994-02-22 1997-07-10 Italtel Spa Sistema con multiplazione ortogonale a divisione di frequenza (ofdm) per la trasmissione di sequenze di dati
US5987005A (en) * 1997-07-02 1999-11-16 Telefonaktiebolaget Lm Ericsson Method and apparatus for efficient computation of discrete fourier transform (DFT) and inverse discrete fourier transform
JP4083861B2 (ja) * 1998-03-06 2008-04-30 株式会社日立国際電気 ディジタル信号伝送装置
EP1063824B1 (en) * 1999-06-22 2006-08-02 Matsushita Electric Industrial Co., Ltd. Symbol synchronisation in multicarrier receivers

Also Published As

Publication number Publication date
EP1702445A1 (en) 2006-09-20
EP1702445B1 (en) 2007-05-16
CN1902876A (zh) 2007-01-24
ATE362683T1 (de) 2007-06-15
CN1902876B (zh) 2010-09-22
US20090323510A1 (en) 2009-12-31
DE602004006537D1 (de) 2007-06-28
WO2005076557A1 (en) 2005-08-18
JP4410801B2 (ja) 2010-02-03
JP2007518302A (ja) 2007-07-05

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