WO2008049623A3 - Receiver and transmitter in a telecommunication system - Google Patents

Receiver and transmitter in a telecommunication system Download PDF

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Publication number
WO2008049623A3
WO2008049623A3 PCT/EP2007/009286 EP2007009286W WO2008049623A3 WO 2008049623 A3 WO2008049623 A3 WO 2008049623A3 EP 2007009286 W EP2007009286 W EP 2007009286W WO 2008049623 A3 WO2008049623 A3 WO 2008049623A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
transmitter
receiver
fourier transformer
telecommunication system
bit
Prior art date
Application number
PCT/EP2007/009286
Other languages
French (fr)
Other versions
WO2008049623A2 (en )
Inventor
Ludwig Schwoerer
Original Assignee
Nokia Corp
Ludwig Schwoerer
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

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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
    • H04L27/2626Arrangements specific to the transmitter
    • H04L27/2627Modulators
    • H04L27/2628Inverse Fourier transform modulators, e.g. IFFT/IDFT
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10Complex mathematical operations
    • G06F17/14Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
    • G06F17/141Discrete Fourier transforms
    • G06F17/142Fast Fourier transforms, e.g. using a Cooley-Tukey type algorithm
    • 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
    • H04L27/2649Demodulators
    • H04L27/265Fourier transform demodulators
    • 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
    • H04L27/2602Signal structure

Abstract

In telecommunication systems, in particular OFDM telecommunication systems, there is a Fourier transformer for transforming the data signal from time to frequency domain. The present invention proposes to define the bit-reversed output of the Fourier transformer at least as a part of a deinterleaving process in a receiver. In a transmitter, the bit-reversed input of the inverse Fourier transformer is used accordingly.
PCT/EP2007/009286 2006-10-26 2007-10-25 Receiver and transmitter in a telecommunication system WO2008049623A3 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP06022392 2006-10-26
EP06022392.2 2006-10-26
US11/654,572 2007-01-18
US11654572 US20080101485A1 (en) 2006-10-26 2007-01-18 Receiver and transmitter in a telecommunication system

Publications (2)

Publication Number Publication Date
WO2008049623A2 true WO2008049623A2 (en) 2008-05-02
WO2008049623A3 true true WO2008049623A3 (en) 2008-06-19

Family

ID=39269335

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/009286 WO2008049623A3 (en) 2006-10-26 2007-10-25 Receiver and transmitter in a telecommunication system

Country Status (1)

Country Link
WO (1) WO2008049623A3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731284A (en) * 1971-12-27 1973-05-01 Bell Telephone Labor Inc Method and apparatus for reordering data
US5365470A (en) * 1993-02-10 1994-11-15 Trw Inc. Fast fourier transform multiplexed pipeline
US6631167B1 (en) * 1999-06-14 2003-10-07 Stmicroelectronics S.A. Process and device for transforming real data into complex symbols, in particular for the reception of phase-modulated and amplitude-modulated carriers transmitted on a telephone line
US20060072649A1 (en) * 2002-10-26 2006-04-06 Kyung-Hi Chang Frequency hopping ofdma method using symbols of comb pattern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731284A (en) * 1971-12-27 1973-05-01 Bell Telephone Labor Inc Method and apparatus for reordering data
US5365470A (en) * 1993-02-10 1994-11-15 Trw Inc. Fast fourier transform multiplexed pipeline
US6631167B1 (en) * 1999-06-14 2003-10-07 Stmicroelectronics S.A. Process and device for transforming real data into complex symbols, in particular for the reception of phase-modulated and amplitude-modulated carriers transmitted on a telephone line
US20060072649A1 (en) * 2002-10-26 2006-04-06 Kyung-Hi Chang Frequency hopping ofdma method using symbols of comb pattern

Also Published As

Publication number Publication date Type
WO2008049623A2 (en) 2008-05-02 application

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