BR0013532B1 - Processo de redução da razão de energia de pico para média em um sinal de freqüência de rádio, e, transmissor de preqüência de rádio fornecendo uma razão reduzida de energia de pico para energia média em um sinal de freqüência de rádio - Google Patents

Processo de redução da razão de energia de pico para média em um sinal de freqüência de rádio, e, transmissor de preqüência de rádio fornecendo uma razão reduzida de energia de pico para energia média em um sinal de freqüência de rádio Download PDF

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Publication number
BR0013532B1
BR0013532B1 BRPI0013532-1A BR0013532A BR0013532B1 BR 0013532 B1 BR0013532 B1 BR 0013532B1 BR 0013532 A BR0013532 A BR 0013532A BR 0013532 B1 BR0013532 B1 BR 0013532B1
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BR
Brazil
Prior art keywords
modulated signal
produce
signal
magnitude
data symbol
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Application number
BRPI0013532-1A
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English (en)
Portuguese (pt)
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BR0013532A (pt
Inventor
Anjali Shastri
Brian William Kroeger
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Ibiquity Digital Corp
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.)
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Publication date
Application filed by Ibiquity Digital Corp filed Critical Ibiquity Digital Corp
Publication of BR0013532A publication Critical patent/BR0013532A/pt
Publication of BR0013532B1 publication Critical patent/BR0013532B1/pt

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    • 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
    • H04L27/2624—Reduction thereof by clipping by soft clipping

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
BRPI0013532-1A 1999-08-24 2000-08-23 Processo de redução da razão de energia de pico para média em um sinal de freqüência de rádio, e, transmissor de preqüência de rádio fornecendo uma razão reduzida de energia de pico para energia média em um sinal de freqüência de rádio BR0013532B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/379780 1999-08-24
US09/379,780 US6128350A (en) 1999-08-24 1999-08-24 Method and apparatus for reducing peak to average power ratio in digital broadcasting systems
PCT/US2000/023184 WO2001015402A1 (en) 1999-08-24 2000-08-23 Method and apparatus for reducing peak to average power ratio in digital broadcasting systems

Publications (2)

Publication Number Publication Date
BR0013532A BR0013532A (pt) 2002-04-30
BR0013532B1 true BR0013532B1 (pt) 2014-09-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0013532-1A BR0013532B1 (pt) 1999-08-24 2000-08-23 Processo de redução da razão de energia de pico para média em um sinal de freqüência de rádio, e, transmissor de preqüência de rádio fornecendo uma razão reduzida de energia de pico para energia média em um sinal de freqüência de rádio

Country Status (15)

Country Link
US (1) US6128350A (enExample)
EP (1) EP1206866B1 (enExample)
JP (1) JP4574095B2 (enExample)
KR (1) KR100623830B1 (enExample)
CN (1) CN1205793C (enExample)
AR (1) AR027843A1 (enExample)
AT (1) ATE308187T1 (enExample)
AU (1) AU765568B2 (enExample)
BR (1) BR0013532B1 (enExample)
CA (1) CA2385125C (enExample)
DE (1) DE60023513T2 (enExample)
MX (1) MXPA02001364A (enExample)
RU (1) RU2234199C2 (enExample)
TW (1) TW519804B (enExample)
WO (1) WO2001015402A1 (enExample)

Families Citing this family (85)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19808993C2 (de) * 1998-03-03 2003-12-18 Fraunhofer Ges Forschung Verfahren zur Spitzenwertreduktion bei Einträger-modulierten oder Mehrträger-modulierten, digitalen Sendesignalen
US6556557B1 (en) 1999-06-02 2003-04-29 At&T Corp. Method and system for reducing of peak-to-average power ratio of transmission signals comprising overlapping waveforms
US6961369B1 (en) 1999-11-09 2005-11-01 Aware, Inc. System and method for scrambling the phase of the carriers in a multicarrier communications system
US6922448B1 (en) * 1999-11-17 2005-07-26 Texas Instruments Incorporated Upstream power back-off
US7908172B2 (en) 2000-03-09 2011-03-15 Impulse Radio Inc System and method for generating multimedia accompaniments to broadcast data
US8396100B2 (en) 2001-07-17 2013-03-12 Impulse Radio, Inc. System and method for transmitting digital multimedia data with analog broadcast data
US7418043B2 (en) * 2000-07-19 2008-08-26 Lot 41 Acquisition Foundation, Llc Software adaptable high performance multicarrier transmission protocol
EP1302045A2 (en) 2000-07-21 2003-04-16 PMC-Sierra Ltd. Reduction of peak to average power ratio
US8670390B2 (en) 2000-11-22 2014-03-11 Genghiscomm Holdings, LLC Cooperative beam-forming in wireless networks
US20020168016A1 (en) * 2001-03-14 2002-11-14 Xianbin Wang Method and apparatus for reducing peak to average power ratio in a multi-carrier modulation communication system
US7127005B2 (en) * 2001-03-23 2006-10-24 James Stuart Wight Computational circuits and methods for processing modulated signals having non-constant envelopes
US10931338B2 (en) 2001-04-26 2021-02-23 Genghiscomm Holdings, LLC Coordinated multipoint systems
US10355720B2 (en) 2001-04-26 2019-07-16 Genghiscomm Holdings, LLC Distributed software-defined radio
US9819449B2 (en) 2002-05-14 2017-11-14 Genghiscomm Holdings, LLC Cooperative subspace demultiplexing in content delivery networks
US20030063663A1 (en) * 2001-10-01 2003-04-03 Bryant Paul Henry Multistage equalizer that corrects for linear and nonlinear distortion in a digitally-modulated signal
US20030067990A1 (en) * 2001-10-01 2003-04-10 Bryant Paul Henry Peak to average power ratio reduction in a digitally-modulated signal
US8331490B2 (en) * 2001-10-22 2012-12-11 Panasonic Corporation Methods and apparatus for conditioning communications signals based on detection of high-frequency events in polar domain
US7054385B2 (en) * 2001-10-22 2006-05-30 Tropian, Inc. Reduction of average-to-minimum power ratio in communications signals
US20070211829A1 (en) * 2001-10-22 2007-09-13 Matsushita Electric Industrial Co., Ltd. Method and apparatus for pulse optimization for non-linear filtering
FR2832275B1 (fr) * 2001-11-12 2004-11-19 Evolium Sas Procede d'ecretage de signaux a plusieurs porteuses transmis par un meme amplificateur non-lineaire
US10200227B2 (en) 2002-05-14 2019-02-05 Genghiscomm Holdings, LLC Pre-coding in multi-user MIMO
US9628231B2 (en) 2002-05-14 2017-04-18 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US10142082B1 (en) 2002-05-14 2018-11-27 Genghiscomm Holdings, LLC Pre-coding in OFDM
US10644916B1 (en) 2002-05-14 2020-05-05 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US7260054B2 (en) * 2002-05-30 2007-08-21 Denso Corporation SINR measurement method for OFDM communications systems
KR100631243B1 (ko) 2002-06-21 2006-10-02 엘지전자 주식회사 비디오 데이터의 재생을 관리하기 위한 데이터 구조를갖는 기록 매체
KR100582957B1 (ko) 2002-06-21 2006-05-23 엘지전자 주식회사 비디오 데이터의 재생을 관리하기 위한 데이터 구조를 갖는기록 매체
EP1516332A4 (en) 2002-06-24 2009-07-22 Lg Electronics Inc RECORDING MEDIUM WITH A DATA STRUCTURE FOR MANAGING THE REPRODUCTION OF MULTI-TITLE VIDEO DATA RECORDED THEREFROM AND PLAYBACK PROCESSES AND DEVICES
CN1565028B (zh) 2002-06-24 2010-05-26 Lg电子株式会社 记录和再现方法及装置
KR20040000290A (ko) 2002-06-24 2004-01-03 엘지전자 주식회사 고밀도 광디스크의 멀티 경로 데이터 스트림 관리방법
KR100866181B1 (ko) * 2002-07-30 2008-10-30 삼성전자주식회사 통신 시스템에서 신호 송수신 방법 및 장치
JP4431043B2 (ja) 2002-10-14 2010-03-10 エルジー エレクトロニクス インコーポレイティド 記録された複数のオーディオストリームの再生を管理するためのデータ構造を有する光ディスク、それによる記録及び再生方法及び装置
ATE547792T1 (de) 2002-10-15 2012-03-15 Lg Electronics Inc Aufzeichnungsmedium mit einer datenstruktur zur verwaltung der wiedergabe mehrerer darauf aufgezeichneter grafikströme und aufzeichnungs- und wiedergabeverfahren und vorrichtungen
CN100483967C (zh) * 2002-12-31 2009-04-29 中国科学技术大学 一种控制峰值功率的发射机和接收机
US7606463B2 (en) 2003-02-24 2009-10-20 Lg Electronics, Inc. Recording medium having data structure for managing playback control and recording and reproducing methods and apparatuses
US7693394B2 (en) 2003-02-26 2010-04-06 Lg Electronics Inc. Recording medium having data structure for managing reproduction of data streams recorded thereon and recording and reproducing methods and apparatuses
US7809775B2 (en) 2003-02-27 2010-10-05 Lg Electronics, Inc. Recording medium having data structure for managing playback control recorded thereon and recording and reproducing methods and apparatuses
WO2004077417A1 (en) 2003-02-28 2004-09-10 Lg Electronics Inc. Recording medium having data structure for managing random/shuffle reproduction of video data recorded thereon and recording and reproducing methods and apparatuses
US7620301B2 (en) 2003-04-04 2009-11-17 Lg Electronics Inc. System and method for resuming playback
GB2401516A (en) * 2003-04-17 2004-11-10 Univ Southampton Peak-to-average power ratio reduction by subtracting shaped pulses from a baseband signal
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
WO2005020529A1 (en) * 2003-08-22 2005-03-03 Koninklijke Philips Electronics N.V. Backward compatible multi-carrier transmission system
US7542517B2 (en) * 2004-02-02 2009-06-02 Ibiquity Digital Corporation Peak-to-average power reduction for FM OFDM transmission
CN1965553B (zh) * 2004-03-12 2010-05-26 株式会社Ntt都科摩 生成误差信号的设备和方法
JP4436409B2 (ja) * 2004-03-12 2010-03-24 株式会社エヌ・ティ・ティ・ドコモ クリッピングおよび修正されたコンステレーションを用いるｏｆｄｍにおけるピーク低減
US8166299B2 (en) 2004-07-06 2012-04-24 Andrew Christopher Kemshall Secure messaging
US8141118B2 (en) * 2004-07-26 2012-03-20 Microsoft Corporation Data broadcasting receiver power management
US11184037B1 (en) 2004-08-02 2021-11-23 Genghiscomm Holdings, LLC Demodulating and decoding carrier interferometry signals
US11552737B1 (en) 2004-08-02 2023-01-10 Genghiscomm Holdings, LLC Cooperative MIMO
US11431386B1 (en) 2004-08-02 2022-08-30 Genghiscomm Holdings, LLC Transmit pre-coding
US7474707B2 (en) * 2004-09-09 2009-01-06 Ibiquity Digital Corporation Bandwidth reduction of an FM broadcast signal using a baseband precompensation technique
CN100364302C (zh) * 2005-01-28 2008-01-23 北京北广科数字广播电视技术有限公司 模拟调幅中波广播发射机数字化改造的数字音频处理方法
US7453953B2 (en) * 2005-06-01 2008-11-18 Motorola, Inc. System and method for enlarging amplitude minima in a linear modulation signal
US7653122B2 (en) * 2005-06-01 2010-01-26 University Of Maryland Method and system for power controlled effective allocation of sub-bands in ultra-wideband communication
US20060291584A1 (en) * 2005-06-28 2006-12-28 Harris Corporation Composite crest factor reduction
US8280420B2 (en) * 2006-04-03 2012-10-02 Qualcomm Incorporated Multi-level saturation
US8064537B2 (en) * 2006-11-03 2011-11-22 Qualcomm Incorporated Method and apparatus for dynamically adjusting a transmission power spectral density of pilot and data symbols
KR100902017B1 (ko) * 2007-12-28 2009-06-15 포스데이타 주식회사 직교주파수분할다중접속 방식의 단말기에서 부반송파의크기 조정을 위한 송신 장치 및 방법
GB0810855D0 (en) * 2008-06-13 2008-07-23 Gigle Semiconductors Ltd Method system and computer program for improving a communication system
GB2461904B (en) * 2008-07-17 2011-02-02 Martin Tomlinson Handoff communication system for internet radio
WO2010027768A2 (en) * 2008-08-25 2010-03-11 Aware, Inc. Transmit psd ceiling in packet-based ofdm systems
CN102025682B (zh) * 2010-12-24 2013-05-01 北京邮电大学 全光ofdm系统发射机装置、ofdm系统及处理信号的方法
US8798196B2 (en) 2011-01-25 2014-08-05 Ibiquity Digital Corporation Peak-to-average power ratio reduction for hybrid FM HD radio transmission
US20130044836A1 (en) * 2011-08-18 2013-02-21 Vyycore Ltd. Device and method for pre-distorting and amplifying a signal based on an error attribute
US20130113559A1 (en) * 2011-11-08 2013-05-09 Vyycore Ltd. Device and method for pre-distorting and amplifying a signal based on an error attribute
RU2527478C2 (ru) * 2012-10-03 2014-09-10 Федеральное государственное бюджетное учреждение науки Институт проблем проектирования в микроэлектронике Российской академии наук (ИППМ РАН) Энергоэффективные передатчик и приемник сигналов в проводной линии связи с устройством переключения режимов
US9191256B2 (en) 2012-12-03 2015-11-17 Digital PowerRadio, LLC Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems
US8595590B1 (en) 2012-12-03 2013-11-26 Digital PowerRadio, LLC Systems and methods for encoding and decoding of check-irregular non-systematic IRA codes
US8948272B2 (en) 2012-12-03 2015-02-03 Digital PowerRadio, LLC Joint source-channel decoding with source sequence augmentation
US12224860B1 (en) 2014-01-30 2025-02-11 Genghiscomm Holdings, LLC Linear coding in decentralized networks
US9178740B1 (en) 2014-08-26 2015-11-03 Ibiquity Digital Corporation Peak-to-average power ratio reduction for QAM modulation with HD radio signals
KR102262735B1 (ko) * 2015-01-27 2021-06-09 한국전자통신연구원 시간 영역에서의 ｐａｐｒ 감소를 위한 송신 신호 처리 방법 및 장치
CA2887751C (en) 2015-04-10 2023-09-05 Nautel Limited Multiplex of high definition radio stations
FR3039730B1 (fr) * 2015-07-27 2017-07-21 Thales Sa Reduction du facteur de crete d'une voie d'emission d'un signal mono-porteuse.
US10637705B1 (en) 2017-05-25 2020-04-28 Genghiscomm Holdings, LLC Peak-to-average-power reduction for OFDM multiple access
US10243773B1 (en) 2017-06-30 2019-03-26 Genghiscomm Holdings, LLC Efficient peak-to-average-power reduction for OFDM and MIMO-OFDM
US11343823B2 (en) 2020-08-16 2022-05-24 Tybalt, Llc Orthogonal multiple access and non-orthogonal multiple access
US11917604B2 (en) 2019-01-25 2024-02-27 Tybalt, Llc Orthogonal multiple access and non-orthogonal multiple access
US12206535B1 (en) 2018-06-17 2025-01-21 Tybalt, Llc Artificial neural networks in wireless communication systems
US11082279B2 (en) 2018-09-27 2021-08-03 At&T Intellectual Property I, L.P. Facilitation of reduction of peak to average power ratio for 5G or other next generation network
US10659270B2 (en) 2018-10-10 2020-05-19 At&T Intellectual Property I, L.P. Mapping reference signals in wireless communication systems to avoid repetition
US11418992B2 (en) 2018-11-02 2022-08-16 At&T Intellectual Property I, L.P. Generation of demodulation reference signals in advanced networks
EP3915236A4 (en) 2019-01-25 2023-05-24 Genghiscomm Holdings, LLC ORTHOGONAL MULTI-ACCESS AND NON-ORTHOGONAL MULTI-ACCESS
WO2020242898A1 (en) 2019-05-26 2020-12-03 Genghiscomm Holdings, LLC Non-orthogonal multiple access
CA3070530A1 (en) 2020-01-30 2021-07-30 Nautel Limited Iboc compatible superposition modulation by independent modulators utilizing clipping noise from peak-to-average power reduction

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370622A (en) * 1981-03-23 1983-01-25 Rockwell International Corporation IMD Limiter
JPH03198407A (ja) * 1989-12-26 1991-08-29 Mitsubishi Electric Corp 線形増幅器
US5381449A (en) * 1990-06-12 1995-01-10 Motorola, Inc. Peak to average power ratio reduction methodology for QAM communications systems
US5201071A (en) * 1990-09-26 1993-04-06 Rockwell International Corporation Method and apparatus for reducing the peak envelope voltage of an RF transmitter while maintaining signal average power
RU2019041C1 (ru) * 1991-04-26 1994-08-30 Борис Иванович Волков Система цифрового стереофонического радиовещания
GB9218874D0 (en) * 1992-09-07 1992-10-21 British Broadcasting Corp Improvements relating to the transmission of frequency division multiplex signals
US5302914A (en) * 1992-10-20 1994-04-12 At&T Bell Laboratories Method and apparatus for reducing the peak-to-average power in multi-carrier RF communication systems
US5300894A (en) * 1992-10-20 1994-04-05 At&T Bell Laboratories Circuitry for minimizing peak power in an amplifier carrying a plurality of signals of differing frequencies
US5359601A (en) * 1992-10-30 1994-10-25 Scientific-Atlanta, Inc. Apparatus providing dynamic virtual service selection in a multi-service communications system
FR2707127A1 (fr) * 1993-06-29 1995-01-06 Philips Laboratoire Electroniq Système de transmission numérique à prédisposition.
JP3420613B2 (ja) * 1993-06-30 2003-06-30 日本無線株式会社 直交変調器
US5349300A (en) * 1993-08-10 1994-09-20 Motorola, Inc. Method and apparatus for controlling a peak envelope power of a PA
GB9418514D0 (en) * 1994-09-14 1994-11-02 At & T Global Inf Solution Information transmission system
US5838732A (en) * 1994-10-31 1998-11-17 Airnet Communications Corp. Reducing peak-to-average variance of a composite transmitted signal generated by a digital combiner via carrier phase offset
US5835536A (en) * 1995-02-02 1998-11-10 Motorola, Inc. Method and apparatus for reducing peak-to-average requirements in multi-tone communication circuits
US5621762A (en) * 1995-06-12 1997-04-15 Motorola, Inc. Radio with peak power and bandwidth efficient modulation
US5606578A (en) * 1995-06-26 1997-02-25 Motorola, Inc. Radio with peak power and bandwidth efficient modulation using asymmetric symbol constellations
US5727026A (en) * 1995-11-15 1998-03-10 Motorola, Inc. Method and apparatus for peak suppression using complex scaling values
US5710990A (en) * 1996-03-21 1998-01-20 Motorola, Inc. Transmitter which adjusts peak-to-average power of a multicarrier signal by switching between a group of channels and a phase-adjusted group of channels
US5796784A (en) * 1996-03-27 1998-08-18 Motorola, Inc. Method and apparatus for modifying amplitude of at least one symbol
US5696794A (en) * 1996-04-04 1997-12-09 Motorola, Inc. Method and apparatus for conditioning digitally modulated signals using channel symbol adjustment
US5815532A (en) * 1996-05-01 1998-09-29 Glenayre Electronics, Inc. Method and apparatus for peak-to-average ratio control in an amplitude modulation paging transmitter
US5949796A (en) * 1996-06-19 1999-09-07 Kumar; Derek D. In-band on-channel digital broadcasting method and system
JPH1051418A (ja) * 1996-08-06 1998-02-20 Mitsubishi Electric Corp ディジタル受信装置
US5970053A (en) * 1996-12-24 1999-10-19 Rdl, Inc. Method and apparatus for controlling peak factor of coherent frequency-division-multiplexed systems
FR2758030B1 (fr) * 1996-12-31 1999-03-26 Sgs Thomson Microelectronics Procede et dispositif de mise en forme d'un bruit d'ecretage d'une modulation multiporteuse
US6081158A (en) * 1997-06-30 2000-06-27 Harris Corporation Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system
US6049707A (en) * 1997-09-02 2000-04-11 Motorola, Inc. Broadband multicarrier amplifier system and method using envelope elimination and restoration
FR2771242B1 (fr) * 1997-11-14 2003-10-24 Itis Procede et dispositif pour reduire le facteur de crete de signaux de radiodiffusion ou telediffusion numerique

Also Published As

Publication number Publication date
KR20020036846A (ko) 2002-05-16
KR100623830B1 (ko) 2006-09-18
DE60023513D1 (de) 2005-12-01
JP2003507968A (ja) 2003-02-25
CA2385125A1 (en) 2001-03-01
AU765568B2 (en) 2003-09-25
EP1206866A1 (en) 2002-05-22
JP4574095B2 (ja) 2010-11-04
US6128350A (en) 2000-10-03
TW519804B (en) 2003-02-01
AR027843A1 (es) 2003-04-16
CN1370365A (zh) 2002-09-18
AU6931000A (en) 2001-03-19
RU2234199C2 (ru) 2004-08-10
CN1205793C (zh) 2005-06-08
ATE308187T1 (de) 2005-11-15
DE60023513T2 (de) 2006-07-20
BR0013532A (pt) 2002-04-30
CA2385125C (en) 2008-06-03
WO2001015402A1 (en) 2001-03-01
MXPA02001364A (es) 2002-07-30
EP1206866B1 (en) 2005-10-26

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Ipc: H04L 27/26 (2006.01), H04L 27/32 (2006.01), H04J 1

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