WO2008004154A3 - Bandwidth asymmetric communication system - Google Patents

Bandwidth asymmetric communication system Download PDF

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Publication number
WO2008004154A3
WO2008004154A3 PCT/IB2007/052394 IB2007052394W WO2008004154A3 WO 2008004154 A3 WO2008004154 A3 WO 2008004154A3 IB 2007052394 W IB2007052394 W IB 2007052394W WO 2008004154 A3 WO2008004154 A3 WO 2008004154A3
Authority
WO
WIPO (PCT)
Prior art keywords
bandwidth
communication system
radio frequency
transmission unit
ofdm signals
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/IB2007/052394
Other languages
French (fr)
Other versions
WO2008004154A2 (en
Inventor
Yonggang Du
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to US12/306,270 priority Critical patent/US20090201984A1/en
Priority to EP07789765A priority patent/EP2041892A2/en
Priority to JP2009517526A priority patent/JP2009543405A/en
Publication of WO2008004154A2 publication Critical patent/WO2008004154A2/en
Publication of WO2008004154A3 publication Critical patent/WO2008004154A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2621—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using frequency division multiple access [FDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • H04L5/0046—Determination of the number of bits transmitted on different sub-channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • 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
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • 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
    • 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
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
    • 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
    • H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
    • 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
    • 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
    • H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker
    • H04J13/0029—Gold
    • 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
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • 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
    • H04L27/2662—Symbol synchronisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to a bandwidth asymmetric communication system comprising at least one terminal having an uplink transmission unit (1) for transmitting radio frequency OFDM signals at a radio frequency and an access point having an uplink receiving unit (4) for receiving said radio frequency OFDM signals, said OFDM signals being Orthogonal Frequency Division Multiplex (OFDM) modulated. To reduce the implementation complexity and synchronization requirements a communication system is proposed in which the bandwidth of said uplink transmission unit and of the transmitted radio frequency OFDM signals is smaller than the bandwidth of said uplink receiving unit. Further, a communication system is proposed in which the bandwidth of a downlink transmission unit (7) of the access point is larger than the bandwidth of a downlink receiving unit (11) of the at least one terminal and in which the downlink transmission unit is adapted to generate and transmit radio frequency OFDM signals having a bandwidth that is smaller than the bandwidth of the downlink transmission unit and that is equal to the bandwidth of the downlink receiving unit. Still further, the present invention relates to a communication method, to a terminal and to an access point for use in such a communication system.
PCT/IB2007/052394 2006-07-05 2007-06-21 Bandwidth asymmetric communication system Ceased WO2008004154A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/306,270 US20090201984A1 (en) 2006-07-05 2007-06-21 Bandwidth asymmetric communication system
EP07789765A EP2041892A2 (en) 2006-07-05 2007-06-21 Bandwidth asymmetric communication system
JP2009517526A JP2009543405A (en) 2006-07-05 2007-06-21 Bandwidth asymmetric communication system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06116631.0 2006-07-05
EP06116631A EP1876729A1 (en) 2006-07-05 2006-07-05 Bandwidth asymmetric communication system

Publications (2)

Publication Number Publication Date
WO2008004154A2 WO2008004154A2 (en) 2008-01-10
WO2008004154A3 true WO2008004154A3 (en) 2008-04-03

Family

ID=36746267

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/052394 Ceased WO2008004154A2 (en) 2006-07-05 2007-06-21 Bandwidth asymmetric communication system

Country Status (7)

Country Link
US (1) US20090201984A1 (en)
EP (2) EP1876729A1 (en)
JP (1) JP2009543405A (en)
KR (1) KR20090064359A (en)
CN (1) CN101485117A (en)
TW (1) TW200814582A (en)
WO (1) WO2008004154A2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876730A1 (en) * 2006-07-05 2008-01-09 Koninklijke Philips Electronics N.V. Bandwidth asymmetric communication system
US8050369B2 (en) 2008-04-14 2011-11-01 Telefonaktiebolaget Lm Ericsson (Publ) System and method of receiving and processing multicommunication signals
WO2009154278A1 (en) * 2008-06-20 2009-12-23 日本電信電話株式会社 Receiver device, transmitting system and reception method
US8730938B2 (en) 2009-04-08 2014-05-20 Qualcomm Incorporated Minimizing the impact of self synchronization on wireless communication devices
US8743762B2 (en) * 2009-06-03 2014-06-03 Intel Corporation Partial DMM reception to reduce standby power
CN101909038B (en) * 2010-09-08 2012-12-12 中国人民解放军信息工程大学 Method and device for estimating blind signal bandwidth
EP2774303B1 (en) * 2011-11-02 2020-05-20 NXP USA, Inc. Method and apparatus for automatically detecting a physical layer (phy) mode of a data unit in a wireless local area network (wlan)
CN104244398B (en) * 2014-09-02 2017-10-10 深圳市力合微电子股份有限公司 Generation method based on the OFDM micro power radio communication system synchronization signals modulated
EP3437201B1 (en) * 2016-03-31 2021-07-28 British Telecommunications public limited company Method and apparatus for transmitting data over a plurality of pairs of wires
US11239972B2 (en) * 2016-11-17 2022-02-01 Qualcomm Incorporated Large cell support for narrowband random access
TWI684334B (en) * 2016-12-16 2020-02-01 大陸商貴州濎通芯物聯技術有限公司 Cyclic-frequency shift orthogonal frequency division multiplex spread spectrum device
TWI792954B (en) * 2022-03-23 2023-02-11 瑞昱半導體股份有限公司 Communication device and method of handling papr
EP4566197A1 (en) * 2022-08-01 2025-06-11 Hughes Network Systems, LLC Loopback signal, receiver and transmitter for synchronization

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760564A2 (en) * 1995-08-28 1997-03-05 Telia Ab Random access in multicarrier systems
EP0869647A2 (en) * 1997-04-01 1998-10-07 Lucent Technologies Inc. System of multicarreir modulation with dynamically scalable operating parameters
US20030072256A1 (en) * 2001-08-20 2003-04-17 Samsung Electronics Co., Ltd. Method for creating symmetric-identical preamble and method for synchronizing symbol and frequency of orthogonal frequency division multiplexed signals by using symmetric-identical preamble
EP1622295A1 (en) * 2003-05-06 2006-02-01 Diseno de Sistemas en Silicio S.A. Method for the spectral configuration of signals modulated by means of orthogonal frequency division multiplexing (ofdm) for an electrical network

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JP3550085B2 (en) * 2000-11-01 2004-08-04 松下電器産業株式会社 Wireless transmission device and wireless transmission method
JP4012167B2 (en) * 2004-03-31 2007-11-21 株式会社東芝 Wireless communication system
US7047006B2 (en) * 2004-04-28 2006-05-16 Motorola, Inc. Method and apparatus for transmission and reception of narrowband signals within a wideband communication system
KR20050106657A (en) * 2004-05-06 2005-11-11 한국전자통신연구원 A smart antenna system for forming an eigenbeam for uplink in ofdm/tdd systems, and a method thereof
JP4447416B2 (en) * 2004-09-22 2010-04-07 株式会社エヌ・ティ・ティ・ドコモ Multiband mobile communication system and transmitter
US7239659B2 (en) * 2004-11-04 2007-07-03 Motorola, Inc. Method and apparatus for channel feedback
US7969859B2 (en) * 2005-03-18 2011-06-28 Samsung Electronics Co., Ltd. Method and system for dynamically allocating sub-carriers in an orthogonal frequency division multiplexing network
US8325670B2 (en) * 2006-03-31 2012-12-04 Nextel Communications, Inc. Method, apparatus and computer-readable medium for asymmetric frequency division duplexing operation
EP1865679B1 (en) * 2006-06-07 2009-09-30 Mitsubishi Electric R&D Centre Europe B.V. Multicarrier system with multiple null subcarriers in transmitted signal due to variable receive bandwidths and the resulting multiple potential dc subcarriers
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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760564A2 (en) * 1995-08-28 1997-03-05 Telia Ab Random access in multicarrier systems
EP0869647A2 (en) * 1997-04-01 1998-10-07 Lucent Technologies Inc. System of multicarreir modulation with dynamically scalable operating parameters
US20030072256A1 (en) * 2001-08-20 2003-04-17 Samsung Electronics Co., Ltd. Method for creating symmetric-identical preamble and method for synchronizing symbol and frequency of orthogonal frequency division multiplexed signals by using symmetric-identical preamble
EP1622295A1 (en) * 2003-05-06 2006-02-01 Diseno de Sistemas en Silicio S.A. Method for the spectral configuration of signals modulated by means of orthogonal frequency division multiplexing (ofdm) for an electrical network

Also Published As

Publication number Publication date
CN101485117A (en) 2009-07-15
WO2008004154A2 (en) 2008-01-10
EP1876729A1 (en) 2008-01-09
KR20090064359A (en) 2009-06-18
US20090201984A1 (en) 2009-08-13
EP2041892A2 (en) 2009-04-01
JP2009543405A (en) 2009-12-03
TW200814582A (en) 2008-03-16

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