WO2000065792A8 - A windowing function for maintaining orthogonality of channels in the reception of ofdm symbols - Google Patents

A windowing function for maintaining orthogonality of channels in the reception of ofdm symbols

Info

Publication number
WO2000065792A8
WO2000065792A8 PCT/US2000/011032 US0011032W WO0065792A8 WO 2000065792 A8 WO2000065792 A8 WO 2000065792A8 US 0011032 W US0011032 W US 0011032W WO 0065792 A8 WO0065792 A8 WO 0065792A8
Authority
WO
WIPO (PCT)
Prior art keywords
sample
symbol
windowed
offset
reception
Prior art date
Application number
PCT/US2000/011032
Other languages
French (fr)
Other versions
WO2000065792A1 (en
Inventor
Lawrence W Yonge Iii
Original Assignee
Intellon Corp
Lawrence W Yonge Iii
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 Intellon Corp, Lawrence W Yonge Iii filed Critical Intellon Corp
Priority to EP00926328A priority Critical patent/EP1181797B1/en
Priority to DE60039167T priority patent/DE60039167D1/en
Priority to CA002371748A priority patent/CA2371748C/en
Priority to JP2000614623A priority patent/JP4421117B2/en
Priority to AU44874/00A priority patent/AU4487400A/en
Publication of WO2000065792A1 publication Critical patent/WO2000065792A1/en
Publication of WO2000065792A8 publication Critical patent/WO2000065792A8/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2649Demodulators
    • H04L27/265Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators

Abstract

A windowing mechanism for processing an OFDM symbol is presented. The windowing mechanism (86, 92, 94) applies an apodizing window function having the property Wj + W¿(FFTSIZE/2+j)?=constant, where FFTSize is the size of the FFT sample, to a received OFDM symbol sample and a time-offset version of the OFDM symbol sample to produce sets of window values. The time-offset sample is offset from the original symbol by one half the symbol period. The time-offset windowed sample is shifted (88) into realignment with the windowed original symbol. Corresponding ones of the windowed values are summed (90) together to restore the windowed symbol to its original form.
PCT/US2000/011032 1999-04-26 2000-04-25 A windowing function for maintaining orthogonality of channels in the reception of ofdm symbols WO2000065792A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP00926328A EP1181797B1 (en) 1999-04-26 2000-04-25 A windowing function for maintaining orthogonality of channels in the reception of ofdm symbols
DE60039167T DE60039167D1 (en) 1999-04-26 2000-04-25 A WINDING FUNCTION FOR OBTAINING ORTHOGONALITY ON THE RECEPTION OF OFDM SYMBOLS
CA002371748A CA2371748C (en) 1999-04-26 2000-04-25 A windowing function for maintaining orthogonality of channels in the reception of ofdm symbols
JP2000614623A JP4421117B2 (en) 1999-04-26 2000-04-25 Window function to maintain channel orthogonality in receiving OFDM symbols
AU44874/00A AU4487400A (en) 1999-04-26 2000-04-25 A windowing function for maintaining orthogonality of channels in the reception of ofdm symbols

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/299,810 1999-04-26
US09/299,810 US6269132B1 (en) 1999-04-26 1999-04-26 Windowing function for maintaining orthogonality of channels in the reception of OFDM symbols

Publications (2)

Publication Number Publication Date
WO2000065792A1 WO2000065792A1 (en) 2000-11-02
WO2000065792A8 true WO2000065792A8 (en) 2001-04-19

Family

ID=23156394

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/011032 WO2000065792A1 (en) 1999-04-26 2000-04-25 A windowing function for maintaining orthogonality of channels in the reception of ofdm symbols

Country Status (8)

Country Link
US (1) US6269132B1 (en)
EP (1) EP1181797B1 (en)
JP (1) JP4421117B2 (en)
AT (1) ATE398375T1 (en)
AU (1) AU4487400A (en)
CA (1) CA2371748C (en)
DE (1) DE60039167D1 (en)
WO (1) WO2000065792A1 (en)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442816B1 (en) * 1998-07-08 2004-09-18 삼성전자주식회사 Orthogonal Frequency Division Multiplexing (OFDM) Receiver Synchronization Method and Apparatus
US6760300B1 (en) * 1999-02-17 2004-07-06 Imec High speed wireless OFDM transceiver modem
US6891792B1 (en) * 1999-05-14 2005-05-10 At&T Corp. Method for estimating time and frequency offset in an OFDM system
NZ506558A (en) 2000-08-25 2003-04-29 Ind Res Ltd A broadband indoor communication system using ofdm
NZ509688A (en) 2001-02-01 2003-06-30 Ind Res Ltd Maximum likelihood sychronisation (estimating time delay) for wireless digital communications system using a pilot symbol
US7327794B2 (en) * 2002-06-24 2008-02-05 Intellon Corporation Method and apparatus for detecting a jammed channel in a block oriented digital communication system
WO2004038980A2 (en) * 2002-10-21 2004-05-06 Intellon Corporation Contention-free access intervals on a csma network
US6931076B2 (en) * 2002-12-31 2005-08-16 Intel Corporation Signal detector
US7103111B2 (en) * 2003-06-16 2006-09-05 Motorola, Inc. System and method for generating a spectral efficient root raised cosine (RRC) pulse for increasing spectral efficiency
US7684568B2 (en) * 2003-11-24 2010-03-23 Intellon Corporation Encrypting data in a communication network
US8090857B2 (en) 2003-11-24 2012-01-03 Qualcomm Atheros, Inc. Medium access control layer that encapsulates data from a plurality of received data units into a plurality of independently transmittable blocks
FR2871314B1 (en) * 2004-06-07 2006-09-15 Nortel Networks Ltd METHOD FOR ESTIMATING SYMBOLS OF DIGITAL SIGNAL AND RECEIVER FOR IMPLEMENTING THE METHOD
US8218694B2 (en) 2004-08-03 2012-07-10 Agency For Science, Technology And Research Method for transmitting a digital signal, method for receiving a digital signal, transmitter and receiver
DE102004044957B4 (en) * 2004-09-16 2007-04-19 Infineon Technologies Ag Medium access control unit, mobile radio device and method for mapping by means of a mobile radio device data to be transmitted
US7668247B2 (en) * 2005-01-14 2010-02-23 Texas Instruments Incorporated Methods and systems for performing an overlap-and-add operation
KR100800692B1 (en) * 2005-04-11 2008-02-01 삼성전자주식회사 Apparatus for frequency offset estimation in orthogonal frequency division multiplexing systems and method of the same
US7688904B2 (en) * 2005-05-12 2010-03-30 Intellon Corporation Generating signals for transmission of information
US7590183B2 (en) * 2005-05-12 2009-09-15 Intellon Corporation Generating signals for transmission of information
US7558294B2 (en) * 2005-07-27 2009-07-07 Intellon Corporation Time synchronization in a network
US8175190B2 (en) 2005-07-27 2012-05-08 Qualcomm Atheros, Inc. Managing spectra of modulated signals in a communication network
US7729372B2 (en) 2005-07-27 2010-06-01 Sharp Corporation Communicating in a network that includes a medium having varying transmission characteristics
US7822059B2 (en) 2005-07-27 2010-10-26 Atheros Communications, Inc. Managing contention-free time allocations in a network
US8098757B2 (en) * 2005-10-21 2012-01-17 Alcatel Lucent Method and apparatus for windowing orthogonal frequency division multiplexed signals
US7733983B2 (en) * 2005-11-14 2010-06-08 Ibiquity Digital Corporation Symbol tracking for AM in-band on-channel radio receivers
JP4695523B2 (en) * 2006-02-16 2011-06-08 株式会社東芝 Signal receiving apparatus, signal receiving method, and signal receiving program
US7860147B2 (en) * 2006-08-16 2010-12-28 Harris Corporation Method of communicating and associated transmitter using coded orthogonal frequency division multiplexing (COFDM)
US7903749B2 (en) * 2006-08-16 2011-03-08 Harris Corporation System and method for applying frequency domain spreading to multi-carrier communications signals
US7813433B2 (en) * 2006-08-16 2010-10-12 Harris Corporation System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (OFDM) with selected subcarriers turned on or off
US7751488B2 (en) * 2006-08-16 2010-07-06 Harris Corporation System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (OFDM)
US7649951B2 (en) 2006-08-16 2010-01-19 Harris Corporation System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (OFDM) with applied frequency domain spreading
JP4322928B2 (en) * 2007-02-14 2009-09-02 株式会社東芝 Signal receiving device
KR101484798B1 (en) 2007-05-10 2015-01-28 퀄컴 인코포레이티드 Managing distributed access to a shared medium
US9521090B2 (en) 2007-06-04 2016-12-13 Qualcomm Incorporated Authorizing stations into a centrally managed network
US8595278B2 (en) * 2009-03-03 2013-11-26 Broadcom Corporation Method and system for unconstrained frequency domain adaptive filtering
CN101599941B (en) * 2009-04-24 2012-05-30 新邮通信设备有限公司 Method and device for generating orthogonal frequency division multiplexing signal
KR101441862B1 (en) 2010-04-12 2014-09-23 퀄컴 인코포레이티드 Providing delimiters for low-overhead communication in a network
CN113391122A (en) * 2021-06-09 2021-09-14 中电科思仪科技股份有限公司 Method for improving selectivity of frequency spectrum monitoring channel

Family Cites Families (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5917916B2 (en) 1975-12-26 1984-04-24 日本電気株式会社 Isoudouukisouchi
US4438511A (en) 1980-11-10 1984-03-20 Telebit Corporation Packetized ensemble modem
US5191576A (en) 1988-11-18 1993-03-02 L'Etat Francais and Telediffusion de France S.A. Method for broadcasting of digital data, notably for radio broadcasting at high throughput rate towards mobile receivers, with time frequency interlacing and analog synchronization
US5357502A (en) 1990-02-06 1994-10-18 France Telecom And Telediffusion De France Sa Device for the reception of digital data time frequency interlacing, notably for radio broadcasting at high bit rate towards mobile receivers with nyquist temporal window
FR2658016B1 (en) 1990-02-06 1994-01-21 Etat Francais Cnet METHOD FOR BROADCASTING DIGITAL DATA, ESPECIALLY FOR BROADBAND BROADCASTING TO MOBILES, WITH TIME-FREQUENCY INTERLACING AND CONSISTENT DEMODULATION, AND CORRESPONDING RECEIVER.
CA2078445A1 (en) 1990-03-30 1991-10-17 Arthur Gordon Mason Method and apparatus for transmitting and receiving ofdm carriers
SG44771A1 (en) * 1991-02-28 1997-12-19 Philips Electronics Nv System for broadcasting and receiving digital data receiver and transmitter for use in such system
US5282222A (en) 1992-03-31 1994-01-25 Michel Fattouche Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum
US5555268A (en) 1994-01-24 1996-09-10 Fattouche; Michel Multicode direct sequence spread spectrum
GB9218874D0 (en) 1992-09-07 1992-10-21 British Broadcasting Corp Improvements relating to the transmission of frequency division multiplex signals
US5546429A (en) 1992-11-09 1996-08-13 Motorola, Inc. Frequency hopping code division multiple access radio communication unit
DE69327837T2 (en) 1992-12-01 2000-10-12 Koninkl Philips Electronics Nv Subband diversity transmission system
EP1035699B1 (en) 1993-01-20 2005-03-16 Koninklijke Philips Electronics N.V. Method for isolating a block frequency from a block formatted signal
CA2115118A1 (en) 1993-02-08 1994-08-09 Arie Geert Cornelis Koppelaar Method of transmitting a data stream, transmitter and receiver
SE500986C2 (en) 1993-07-20 1994-10-17 Telia Ab Method and apparatus for synchronization in digital transmission system of type OFDM
JPH0746217A (en) 1993-07-26 1995-02-14 Sony Corp Digital demodulator
JPH0746218A (en) 1993-07-28 1995-02-14 Sony Corp Digital demodulator
US5444697A (en) 1993-08-11 1995-08-22 The University Of British Columbia Method and apparatus for frame synchronization in mobile OFDM data communication
US5596604A (en) 1993-08-17 1997-01-21 Amati Communications Corporation Multicarrier modulation transmission system with variable delay
JP3041175B2 (en) 1993-11-12 2000-05-15 株式会社東芝 OFDM synchronous demodulation circuit
US5450456A (en) * 1993-11-12 1995-09-12 Daimler Benz Ag Method and arrangement for measuring the carrier frequency deviation in a multi-channel transmission system
JP3074103B2 (en) 1993-11-16 2000-08-07 株式会社東芝 OFDM synchronous demodulation circuit
SG48266A1 (en) 1993-12-22 1998-04-17 Philips Electronics Nv Multicarrier frequency hopping communications system
SE501608C2 (en) 1994-01-18 1995-03-27 Telia Ab Procedure and arrangement for synchronization in OFDM modulation
US5452015A (en) 1994-02-10 1995-09-19 Philips Electronics North America Corporation Method and apparatus for combating co-channel NTSC interference for digital TV transmission
JP2731722B2 (en) 1994-05-26 1998-03-25 日本電気株式会社 Clock frequency automatic control system and transmitter and receiver used therefor
US5627863A (en) 1994-07-15 1997-05-06 Amati Communications Corporation Frame synchronization in multicarrier transmission systems
US5682376A (en) 1994-12-20 1997-10-28 Matsushita Electric Industrial Co., Ltd. Method of transmitting orthogonal frequency division multiplex signal, and transmitter and receiver employed therefor
US5774450A (en) 1995-01-10 1998-06-30 Matsushita Electric Industrial Co., Ltd. Method of transmitting orthogonal frequency division multiplexing signal and receiver thereof
KR100411165B1 (en) 1995-02-01 2004-04-28 코닌클리케 필립스 일렉트로닉스 엔.브이. Error prevention transmission method of data, error reception method of data, and transmission system for data transmission
JP3130752B2 (en) 1995-02-24 2001-01-31 株式会社東芝 OFDM transmission receiving method and transmitting / receiving apparatus
SE514986C2 (en) 1995-03-01 2001-05-28 Telia Ab Method and device for synchronization with OFDM systems
US5636224A (en) 1995-04-28 1997-06-03 Motorola Inc. Method and apparatus for interleave/de-interleave addressing in data communication circuits
US5790516A (en) 1995-07-14 1998-08-04 Telefonaktiebolaget Lm Ericsson Pulse shaping for data transmission in an orthogonal frequency division multiplexed system
US5633896A (en) * 1996-02-21 1997-05-27 Usa Digital Radio Partners, L.P. AM compatible digital waveform demodulation using a dual FFT
US5802117A (en) 1996-02-08 1998-09-01 Philips Electronics North America Corporation Method and apparatus for joint frequency offset and timing estimation of a multicarrier modulation system
KR100186930B1 (en) 1996-03-13 1999-05-15 (소장)배문한 Initial frame synchronization method using ofdm method
US5732113A (en) 1996-06-20 1998-03-24 Stanford University Timing and frequency synchronization of OFDM signals
CA2183140C (en) 1996-08-12 2001-11-20 Grant Mcgibney Ofdm timing and frequency recovery system
US5886749A (en) 1996-12-13 1999-03-23 Cable Television Laboratories, Inc. Demodulation using a time domain guard interval with an overlapped transform
US6074086A (en) * 1999-04-26 2000-06-13 Intellon Corporation Synchronization of OFDM signals with improved windowing

Also Published As

Publication number Publication date
JP4421117B2 (en) 2010-02-24
AU4487400A (en) 2000-11-10
CA2371748A1 (en) 2000-11-02
US6269132B1 (en) 2001-07-31
ATE398375T1 (en) 2008-07-15
DE60039167D1 (en) 2008-07-24
EP1181797B1 (en) 2008-06-11
JP2002543673A (en) 2002-12-17
EP1181797A4 (en) 2005-10-26
CA2371748C (en) 2008-08-05
EP1181797A1 (en) 2002-02-27
WO2000065792A1 (en) 2000-11-02

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