EP2100421A1 - Dispositif et procédé de formation d'un signal de réduction dans un système multiporteuse - Google Patents

Dispositif et procédé de formation d'un signal de réduction dans un système multiporteuse

Info

Publication number
EP2100421A1
EP2100421A1 EP07821800A EP07821800A EP2100421A1 EP 2100421 A1 EP2100421 A1 EP 2100421A1 EP 07821800 A EP07821800 A EP 07821800A EP 07821800 A EP07821800 A EP 07821800A EP 2100421 A1 EP2100421 A1 EP 2100421A1
Authority
EP
European Patent Office
Prior art keywords
signal
subcarriers
coefficients
reduction
limited
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.)
Withdrawn
Application number
EP07821800A
Other languages
German (de)
English (en)
Inventor
Bernd Hassler
Björn JELONNEK
Gunter Wolff
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.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Nokia Siemens Networks GmbH and Co KG
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 Nokia Siemens Networks GmbH and Co KG filed Critical Nokia Siemens Networks GmbH and Co KG
Priority to EP07821800A priority Critical patent/EP2100421A1/fr
Publication of EP2100421A1 publication Critical patent/EP2100421A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H04L27/2614—Peak power aspects
    • H04L27/2618—Reduction thereof using auxiliary subcarriers
    • 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
    • H04L27/2614—Peak power aspects
    • H04L27/2623—Reduction thereof by clipping

Definitions

  • the maximum instantaneous power of a transmission signal can therefore be significantly higher than the mean value of the transmission power in the case of multi-carrier systems.
  • the ratio of maximum to average transmission power is referred to as Peak to Average Ratio (PAR> 1) or Peak to Average Power Ratio (PAPR> 1).
  • the present invention allows generation of a reduction signal by projecting a clipped signal onto the unused subcarriers.
  • other educational regulations may be used that result in a greater reduction in peak values. It is not necessary to use an iteration loop for determining the reduction signal, which is executed until a reduced signal no longer undergoes any change by trimming and thus no longer exceeds a threshold value specified when limiting. Instead, a fixed number of reduction stages with constant signal delay can be used. According to the present invention, a different threshold is allowed in each reduction stage. Also, the educational requirements for the reduction signal or the coefficients of reduction level to reduction stage may differ.
  • the signal generator may be configured to generate the reduction signal according to the formula:
  • Fig. 1 is a block diagram of a UMTS transmission system
  • FIG. 3 shows a simplified representation of the principle of interpolating limiting, ie the generation of a limited transmission signal with subcarrier-specific error weighting.
  • a threshold may be varied in the limiter 402 to achieve optimal reduction. Further, the coefficient coef ⁇ can be provided with respective weighting factors. Depending on the circumstances, both the
  • Threshold and the weighting factors to be fixed or variable, for example, to be adjusted during operation.
  • the converter 410 is configured to perform an IFFT over the complex input symbols to generate and provide the signal to a first device 400.
  • the first device 400 which may be any of the devices 400 described above, is configured to receive the signal and provide it as a reduced signal to the second device 400.
  • the second device 400 may be any of the devices 400 described above. That is, the cascaded devices 400 may be identical or different.
  • the second device 400 is configured to receive and again reduce the reduced signal from the first device 400.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

L'invention concerne un dispositif (400) de formation d'un signal de réduction pour un signal qui présente plusieurs sous-porteuses, et qui comprend un limiteur (402) configuré pour former un signal limité (S) à partir du signal qui présente plusieurs sous-porteuses, un dispositif (404) de détermination de coefficients configuré pour déterminer à partir du signal limité des coefficients (CK) pour les sous-porteuses inutilisées du signal qui présente plusieurs sous-porteuses et un générateur (406) de signaux configuré pour former à partir des coefficients le signal de réduction (Xn) qui peut être combiné avec le signal pour former un signal réduit. Le dispositif de détermination de coefficients est configuré pour projeter les signaux limités sur une formule (1) de base K.
EP07821800A 2006-11-16 2007-10-24 Dispositif et procédé de formation d'un signal de réduction dans un système multiporteuse Withdrawn EP2100421A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07821800A EP2100421A1 (fr) 2006-11-16 2007-10-24 Dispositif et procédé de formation d'un signal de réduction dans un système multiporteuse

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06023834A EP1924044A1 (fr) 2006-11-16 2006-11-16 Dispositif et procédé pour la génération d'un signal pour la réduction du PAR dans un système à multiporteuses
EP07821800A EP2100421A1 (fr) 2006-11-16 2007-10-24 Dispositif et procédé de formation d'un signal de réduction dans un système multiporteuse
PCT/EP2007/061437 WO2008058840A1 (fr) 2006-11-16 2007-10-24 Dispositif et procédé de formation d'un signal de réduction dans un système multiporteuse

Publications (1)

Publication Number Publication Date
EP2100421A1 true EP2100421A1 (fr) 2009-09-16

Family

ID=37896164

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06023834A Withdrawn EP1924044A1 (fr) 2006-11-16 2006-11-16 Dispositif et procédé pour la génération d'un signal pour la réduction du PAR dans un système à multiporteuses
EP07821800A Withdrawn EP2100421A1 (fr) 2006-11-16 2007-10-24 Dispositif et procédé de formation d'un signal de réduction dans un système multiporteuse

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06023834A Withdrawn EP1924044A1 (fr) 2006-11-16 2006-11-16 Dispositif et procédé pour la génération d'un signal pour la réduction du PAR dans un système à multiporteuses

Country Status (4)

Country Link
US (1) US8467463B2 (fr)
EP (2) EP1924044A1 (fr)
CN (1) CN101601247B (fr)
WO (1) WO2008058840A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010037405A1 (fr) * 2008-09-30 2010-04-08 Telecom Italia S.P.A. Procédé de transmission de signaux numériques, système de transmission correspondant, signal et produit de programme d'ordinateur associés
WO2011026266A1 (fr) * 2009-09-01 2011-03-10 Xi'an Jiaotong-Liverpool University Réalisation d'un facteur de crête minimal pour des systèmes à porteuses multiples
JP5631485B2 (ja) * 2012-09-07 2014-11-26 三菱電機株式会社 送信機および送信方法
KR102269078B1 (ko) * 2014-02-18 2021-06-24 삼성전자주식회사 송신 장치, 수신 장치 및 그 제어 방법
WO2015126171A1 (fr) 2014-02-18 2015-08-27 Samsung Electronics Co., Ltd. Appareil de transmission, appareil de réception et leurs procédés de commande
US20240080233A1 (en) * 2022-09-01 2024-03-07 Qualcomm Incorporated Techniques for waveform compression

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60121885A (ja) * 1983-12-05 1985-06-29 Victor Co Of Japan Ltd 映像信号の雑音低減回路
US4748498A (en) * 1985-11-19 1988-05-31 Matsushita Electric Industrial Co., Ltd. Luminance signal processing circuit with recursive filter for reducing noise while retaining a high vertical resolution
DE19838295B4 (de) 1997-12-15 2012-06-28 Robert Bosch Gmbh Adaptive Subträgerselektion zur Verringerung der Spitzenwerte eines Multiträger-Signals
US6356606B1 (en) * 1998-07-31 2002-03-12 Lucent Technologies Inc. Device and method for limiting peaks of a signal
EP1248429B1 (fr) 2001-03-29 2016-08-17 Texas Instruments Incorporated Modulation discrète à tons multiples avec un rapport réduit entre puissance de crête et puissance moyenne par utilisation de sous-canaux non-chargés
KR100754621B1 (ko) * 2001-11-09 2007-09-05 삼성전자주식회사 직교주파수분할다중화 방식의 이동통신시스템에서피크전력 대 평균전력의 감소장치 및 방법
DE10219318B4 (de) 2002-04-30 2005-04-14 Siemens Ag Verfahren zur Bildung eines trägerfrequenten Ausgangssignals aus n Teilsignalen eines Basisfrequenzbands
KR100841637B1 (ko) * 2006-04-14 2008-06-26 삼성전자주식회사 광대역 무선통신시스템에서 클리핑 잡음을 줄이기 위한장치 및 방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008058840A1 *

Also Published As

Publication number Publication date
US8467463B2 (en) 2013-06-18
US20100128811A1 (en) 2010-05-27
EP1924044A1 (fr) 2008-05-21
WO2008058840A1 (fr) 2008-05-22
CN101601247B (zh) 2013-01-02
CN101601247A (zh) 2009-12-09

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