KR970705263A - 다중 캐리어 전송 시스템 및 프레임 동기화 방법(frame synchronization in multicarrier transmission system) - Google Patents

다중 캐리어 전송 시스템 및 프레임 동기화 방법(frame synchronization in multicarrier transmission system)

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Publication number
KR970705263A
KR970705263A KR1019970700208A KR19970700208A KR970705263A KR 970705263 A KR970705263 A KR 970705263A KR 1019970700208 A KR1019970700208 A KR 1019970700208A KR 19970700208 A KR19970700208 A KR 19970700208A KR 970705263 A KR970705263 A KR 970705263A
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synchronization
complex
frame
amplitude
correlation result
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KR1019970700208A
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English (en)
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KR100417815B1 (ko
Inventor
스타판 니스트룀
에릭 스타레
마르텐 리그넬
괴란 로쓰
브라이언 론로쓰
비다르 링세트
제임스 티. 아스라니스
재키 에스. 쵸우
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에이취디-디바인
아매티 커뮤니게이션스 코포레이션
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Classifications

    • 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
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • 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
    • H04L27/2665—Fine synchronisation, e.g. by positioning the FFT window
    • 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

Abstract

프레임 동기화가 동기화 프레임의 주파수 도메인 복소수 진폭을 저장된 동기화 패턴과 상관시킴으로써 수신기에 모니터되는 이산 다주파 변조 전송 시스템이 발표된다. 만약 상관결과가 프레임 동기화의 손실을 나타내는 한계치 아래로 떨어지면 다수의 상관이 수행되며, 각 경우에 동기화 프레임의 가능산 타임 스프트에 대응하는 복소수 탈순환을 나타내는 복소수 값이 곱해진 동기화 프레임의 저장된 복소수 진폭을 사용한다. 만약 상관 결과가 또다른 한계 치를 초과하면 최상의 상관결과는 프레임 동기화를 재저장하기 위한 타임 시프트를 나타내며 이것은 다음 동기화 프레임이 수신되기 이전에 가능하다.

Description

다중 캐리어 전송 시스템 및 프레임 동기화 방법(FRAME SYNCHRONIZATION IN MULTICARRIER TRANSMISSION SYSTEM)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 다중캐리어 변조를 사용한 전송 시스템을 보여주는 것으로 프레임 동기화가 본 발명의 구체예에 따라 유지되고 재저장된다.
제2도는 1도의 전송 시스템에서 프레임 동기화를 유지 및 제저장하기 위한 단계를 보여주는 순서도이다.

Claims (17)

  1. 동기화 프레임의 복소수 진폭 저장단계; 동기화 프레임의 복소수 진폭을 동기화 패턴을 나타내는 저장된 정보와 상관시켜서 상관결과를 발생하는 단계; 상관 결과가 프레임 동기화의 손실을 나타내는 한계치 아래로 떨어지는지를 결정하고 이 경우에; 저장된 복소수 진폭의 복소수 탈순환을 나타내는 복소수 값이 곱해진 저장된 복소수 진폭과 저장된 정보간에 다수의 상관을 수행하며, 각 복소수 탈순환은 동기화 프레임의 타임 시프트에 대응하여 각 타임 시프트에 대응하는 다수의 상관 결과를 발생하는 단계; 다수의 상관 결과로 부터 프레임 동기화를 재저장하기 위한 타임 시프트를 결정하는 단계; 그리고 프레임 동기화를 재저장하기 위해서 결정된 타임 시프트에 따라서 프레임 경계를 조절하는 단계를 포함하는 동기화 패턴을 포함한 동기화 프레임이 주기적으로 전송되는 다중 캐리어 변조 전송 시스템에서 프레임 동기화를 유지시키는 방법.
  2. 제 1 항에 있어서, 각 상관결과가 각 복소수 진폭을 동기화 패턴을 나타내는 저장된 정보로 부터 대응하는 복소수 진폭으로 곱하고 복소수 곱의 실수부분을 합산함으로써 얻어짐을 특징으로 하는 방법.
  3. 제 2 항에 있어서, 곱해지는 복소수 진폭의 가중화 단계를 더욱 포함함을 특징으로 하는 방법.
  4. 제 3 항에 있어서, 곱해지는 복소수 진폭에 대한 가중화는 각 복소수 진폭과 관련된 다중캐리어 채널의 신호대 잡음비에 달려있음을 특징으로 하는 방법.
  5. 제 1 항에 있어서, 다수의 상관 결과로 부터 프레임 동기화 재저장을 위한 타임시프트 결정 단계가 다수의 상관 결과로 부터 최상의 상관 결과를 결정하고 최상의 상관결과가 제 2 한계치를 초과한다면 최상의 상관결과에 대응하는 타임 시프트를 선택하는 것을 포함함을 특징으로 하는 방법.
  6. 제 5 항에 있어서, 제 2 한계치가 프레임 동기화 손실을 나타내는 한계치보다 큼을 특징으로 하는 방법.
  7. 제 1 항에 있어서, 시스템의 전송기와 수신기 사이에 주파수 동기화를 위한 예정된 주파수를 가지는 톤을 사용하는 단계; 전송기에서 주파수 도메인에 있는 복소수 진폭을 N-지점 신속한 역 푸리에 변환을 사용하여 타임 도메인 값으로 전환하는 단계; 전송기에서 예정된 주파수의 j배인 샘플링 주파수로 타임 도메인 값을 샘플링 하는 단계, 여기서 j는 2급 역급수이다; 수신기에서 N-지점 신속한 푸리에 변환을 사용하여 타임 도메인 값을 주파수 도메인에 있는 복소수 진폭으로 전환시키는 단계를 포함하며 상기 복소수 탈순환은 한 프레임 기간내에 N/j타임 시프트중 하나에 대응함을 특징으로 하는 방법.
  8. 제 7 항에 있어서, 동기화 프레임이 모든 Q프레임마다 주기적으로 전송되며 Q는 N/j보다 큰 정수임을 특징으로 하는 방법.
  9. 제 8 항에 있어서, 상기 다수의 상관이 한 프레임 기간의 절반까지 어느 방향으로 타임 시프트에 대응하는 N/j상관을 포함함을 특징으로 하는 방법.
  10. 제 9 항에 있어서, N=512, j=8이고, Q=69임을 특징으로 하는 방법.
  11. 제 7 항에 있어서, 다수의 상관 결과로 부터 프레임 동기화를 재저장하기 위한 타임 시프트를 결정하는 단계가 다수의 상관으로 부터 최상의 상관결과를 결정하고 최상의 상관결과가 제 2 한계치를 초과한다면 최상의 상관결과에 대응하는 타임 시프트를 선택하는 것을 포함함을 특징으로 하는 방법.
  12. 제 11 항에 있어서, 제 2 한계치가 프레임 동기화 손실을 나타내는 한계치 보다 큼을 특징으로 하는 방법.
  13. 제 7 항에 있어서, 각 상관결과가 각 복소수 진폭을 동기화 패턴을 나타내는 저장된 정보로 부터 대응하는 복소수 진폭으로 곱하고 복소수 곱의 실수부분을 합산함으로써 얻어짐을 특징으로 하는 방법.
  14. 제 13 항에 있어서, 곱해지는 복소수 진폭의 가중화 단계를 더욱 포함함을 특징으로 하는 방법.
  15. 제 14 항에 있어서, 곱해지는 복소수 진폭의 가중화가 각 복소수 진폭과 관련된 다중 캐리어 패널의 신호대 잡음비에 달려있음을 특징으로 하는 방법.
  16. 타임 도메인 값을 주파수 도메인에 있는 복소수 진폭으로 변화시키는 신속한 푸리에 변화(FFT)장치; 프레임 경계에 따라서 수신된 타임 도메인 값을 FFT장치에 공급하는 버퍼; 시스템의 동기화 프레임의 복소수 진폭을 수신기에 저장된 동기화 패턴과 상관시켜서 상관 결과를 발생하는 상관기; 동기화 프레임의 타임 시프트에 대응하는 복소수 진폭의 복소수 탈순환을 나타내는 복소수 값이 곱해진 복소수 진폭과 저장된 동기화 패턴간에 다수의 상관을 수행하고 최상의 상관결과를 선택함으로써 결정된 타임 시프트에 의해 프레임 경계를 조절하기 위해서 한계치 아래인 상관결과에 반응하는 제어장치를 포함하는 다중 캐리어 변조 전송 시스템 수신기.
  17. 제 16 항에 있어서, 다중 캐리어 채널의 신호대 잡음비에 따라 동기화 패턴을 가중화하는 승산기를 포함함을 특징으로 하는 수신기.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019970700208A 1994-07-15 1995-07-11 다중캐리어전송시스템및프레임동기화방법 KR100417815B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9402464-3 1994-07-13
US08/275,409 1994-07-15
US8/275,409 1994-07-15
US08/275,409 US5627863A (en) 1994-07-15 1994-07-15 Frame synchronization in multicarrier transmission systems

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KR970705263A true KR970705263A (ko) 1997-09-06
KR100417815B1 KR100417815B1 (ko) 2004-05-31

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US (5) US5627863A (ko)
EP (1) EP0771496B1 (ko)
JP (3) JP3303055B2 (ko)
KR (1) KR100417815B1 (ko)
CN (3) CN1095260C (ko)
AU (1) AU696798B2 (ko)
CA (3) CA2347252C (ko)
DE (2) DE29521458U1 (ko)
DK (1) DK0771496T3 (ko)
ES (1) ES2144132T3 (ko)
FI (1) FI115685B (ko)
WO (1) WO1996002991A1 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100713470B1 (ko) * 2000-08-03 2007-04-30 삼성전자주식회사 다중 캐리어를 사용하는 통신 방식에서 초기 동기획득 장치

Families Citing this family (183)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6334219B1 (en) * 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
DE4441566A1 (de) * 1994-11-23 1996-05-30 Bosch Gmbh Robert Verfahren zur digitalen Frequenzkorrektur bei Mehrträgerübertragungsverfahren
US7280564B1 (en) 1995-02-06 2007-10-09 Adc Telecommunications, Inc. Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing
USRE42236E1 (en) 1995-02-06 2011-03-22 Adc Telecommunications, Inc. Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing
GB2302777B (en) * 1995-06-27 2000-02-23 Motorola Israel Ltd Method of recovering symbols of a digitally modulated radio signal
US6289064B1 (en) * 1996-03-07 2001-09-11 Matsushita Communication Industrial Co., Ltd. Synchronization equipment
US5748686A (en) * 1996-04-04 1998-05-05 Globespan Technologies, Inc. System and method producing improved frame synchronization in a digital communication system
US5822368A (en) * 1996-04-04 1998-10-13 Lucent Technologies Inc. Developing a channel impulse response by using distortion
US6002722A (en) * 1996-05-09 1999-12-14 Texas Instruments Incorporated Multimode digital modem
US5790514A (en) * 1996-08-22 1998-08-04 Tellabs Operations, Inc. Multi-point OFDM/DMT digital communications system including remote service unit with improved receiver architecture
US6118758A (en) * 1996-08-22 2000-09-12 Tellabs Operations, Inc. Multi-point OFDM/DMT digital communications system including remote service unit with improved transmitter architecture
US6771590B1 (en) * 1996-08-22 2004-08-03 Tellabs Operations, Inc. Communication system clock synchronization techniques
US5995483A (en) * 1996-08-22 1999-11-30 Tellabs Operations, Inc. Apparatus and method for upstream clock synchronization in a multi-point OFDM/DMT digital communication system
ATE233451T1 (de) * 1996-09-02 2003-03-15 St Microelectronics Nv Verbesserungen bei, oder in bezug auf, mehrträgerübertragungssysteme
DE69718799T2 (de) * 1996-09-02 2003-11-13 St Microelectronics Nv Verbesserungen in, oder in bezug auf mehrträgerübertragungssysteme
WO1998010552A2 (en) * 1996-09-02 1998-03-12 Telia Ab Improvements in, or relating to, multi-carrier transmission systems
US6181714B1 (en) 1996-09-02 2001-01-30 Telia Ab Multi-carrier transmission systems
US5995568A (en) * 1996-10-28 1999-11-30 Motorola, Inc. Method and apparatus for performing frame synchronization in an asymmetrical digital subscriber line (ADSL) system
US6496543B1 (en) * 1996-10-29 2002-12-17 Qualcomm Incorporated Method and apparatus for providing high speed data communications in a cellular environment
JP2988398B2 (ja) * 1996-11-27 1999-12-13 日本電気株式会社 ユニークワード遅延検波方式および復調装置
KR100221336B1 (ko) 1996-12-28 1999-09-15 전주범 직교 주파수 분할 다중화 수신 시스템의 프레임 동기 장치 및 그 방법
KR100230271B1 (ko) * 1997-01-10 1999-11-15 윤종용 Ofdm 시스템 수신기의 미세 fft 윈도우 위치 복원장치
SE517930C2 (sv) * 1997-01-31 2002-08-06 Ericsson Telefon Ab L M Förfarande och anordning för initial synkronisering i ett kommunikationssystem
US6370156B2 (en) 1997-01-31 2002-04-09 Alcatel Modulation/demodulation of a pilot carrier, means and method to perform the modulation/demodulation
US5896425A (en) * 1997-02-24 1999-04-20 At&T Wireless Services Inc Non-uniformly spaced tones for synchronization waveform
US6088385A (en) * 1997-06-30 2000-07-11 Integrated Telecom Express Flexible and scalable rate ADSL transceiver and system
US6065060A (en) * 1997-06-30 2000-05-16 Integrated Telecom Express Modular multiplicative data rate modem and method of operation
US6092122A (en) * 1997-06-30 2000-07-18 Integrated Telecom Express xDSL DMT modem using sub-channel selection to achieve scaleable data rate based on available signal processing resources
US6400759B1 (en) 1997-06-30 2002-06-04 Integrated Telecom Express, Inc. Device driver for rate adaptable modem with forward compatible and expandable functionality
US6128335A (en) * 1997-06-30 2000-10-03 Integrated Telecom Express Software rate adaptable modem with forward compatible and expandable functionality and method of operation
US6442195B1 (en) 1997-06-30 2002-08-27 Integrated Telecom Express, Inc. Multiple low speed sigma-delta analog front ends for full implementation of high-speed data link protocol
US6073179A (en) * 1997-06-30 2000-06-06 Integrated Telecom Express Program for controlling DMT based modem using sub-channel selection to achieve scaleable data rate based on available signal processing resources
US6314102B1 (en) * 1997-07-10 2001-11-06 Alcatel Telecommunications system for providing both narrowband and broadband services to subscribers
US6011807A (en) * 1997-07-18 2000-01-04 Innova Corporation Method and apparatus for transmitting data in a high speed, multiplexed data communication system
EP0895387A1 (de) * 1997-07-28 1999-02-03 Deutsche Thomson-Brandt Gmbh Erkennung des Übertragungsmodus eines DVB-Signales
DE19738780A1 (de) * 1997-09-04 1999-03-11 Thomson Brandt Gmbh Verfahren und Schaltungsanordnung zur Korrektur von Phasen- und/oder Frequenzfehlern digitaler Multicarrier-Signale
US6389062B1 (en) * 1997-09-17 2002-05-14 Texas Instruments Incorporated Adaptive frequency domain equalizer circuits, systems, and methods for discrete multitone based digital subscriber line modem
EP0903897B1 (en) * 1997-09-22 2001-10-31 Alcatel Method and arrangement to determine a clock timing error in a multi-carrier transmission system
US6101216A (en) * 1997-10-03 2000-08-08 Rockwell International Corporation Splitterless digital subscriber line communication system
US6563856B1 (en) 1998-07-08 2003-05-13 Wireless Facilities, Inc. Frame synchronization and detection technique for a digital receiver
US20020159598A1 (en) * 1997-10-31 2002-10-31 Keygen Corporation System and method of dynamic key generation for digital communications
SE511055C2 (sv) * 1997-11-03 1999-07-26 Telia Ab Förbättringar i samband med undertryckning av korthållseko
US6134283A (en) * 1997-11-18 2000-10-17 Amati Communications Corporation Method and system for synchronizing time-division-duplexed transceivers
US6088414A (en) * 1997-12-18 2000-07-11 Alcatel Usa Sourcing, L.P. Method of frequency and phase locking in a plurality of temporal frames
DE19800718A1 (de) * 1998-01-12 1999-07-22 Abb Research Ltd Verfahren zur Übertragung digitaler Daten
US20040160906A1 (en) 2002-06-21 2004-08-19 Aware, Inc. Multicarrier transmission system with low power sleep mode and rapid-on capability
US6151295A (en) * 1998-02-26 2000-11-21 Wavesat Telecom Inc. OFDM receiving system
US6480475B1 (en) 1998-03-06 2002-11-12 Texas Instruments Incorporated Method and system for accomodating a wide range of user data rates in a multicarrier data transmission system
DE19810558A1 (de) * 1998-03-11 1999-09-16 Siemens Ag Integrierbare Funkempfängerschaltung für frequenzmodulierte digitale Signale
US7440498B2 (en) * 2002-12-17 2008-10-21 Tellabs Operations, Inc. Time domain equalization for discrete multi-tone systems
US6631175B2 (en) * 1998-04-03 2003-10-07 Tellabs Operations, Inc. Spectrally constrained impulse shortening filter for a discrete multi-tone receiver
DK1068704T3 (da) 1998-04-03 2012-09-17 Tellabs Operations Inc Filter til impulssvarforkortning, med yderligere spektrale begrænsninger, til multibærebølgeoverførsel
JP3449984B2 (ja) * 1998-04-14 2003-09-22 フラウンホッファー−ゲゼルシャフト ツァー フォルデルング ダー アンゲヴァンドテン フォルシュング イー．ヴイ． マルチ搬送波システムのためのフレーム構造およびフレーム同期
FI106592B (fi) 1998-05-07 2001-02-28 Nokia Multimedia Network Termi Menetelmä ja laite symbolitahdistuksen saavuttamiseksi ja ylläpitämiseksi erityisesti OFDM-järjestelmässä
JP3480313B2 (ja) 1998-05-26 2003-12-15 富士通株式会社 ディジタル加入者線伝送方法及びｘＤＳＬ装置
US6891887B1 (en) 1998-05-27 2005-05-10 3Com Corporation Multi-carrier LAN adapter device using interpolative equalizer
US6507585B1 (en) 1998-05-27 2003-01-14 3Com Corporation Multi-carrier LAN adapter device using frequency domain equalizer
US6704317B1 (en) 1998-05-27 2004-03-09 3Com Corporation Multi-carrier LAN modem server
US6603811B1 (en) 1998-05-29 2003-08-05 3Com Corporation Low complexity frequency domain equalizer having fast re-lock
US6377683B1 (en) 1998-05-29 2002-04-23 3Com Corporation Low complexity frequency domain echo canceller for DMT transceivers
US6618452B1 (en) * 1998-06-08 2003-09-09 Telefonaktiebolaget Lm Ericsson (Publ) Burst carrier frequency synchronization and iterative frequency-domain frame synchronization for OFDM
JP3622510B2 (ja) 1998-06-19 2005-02-23 富士通株式会社 ディジタル加入者線伝送方法、ａｄｓｌトランシーバ、チャンネルアナリシステ方法及びａｄｓｌ装置
US6219377B1 (en) * 1998-06-29 2001-04-17 Legerity, Inc. Method and apparatus for generating tones in a multi-tone modem
US6795424B1 (en) 1998-06-30 2004-09-21 Tellabs Operations, Inc. Method and apparatus for interference suppression in orthogonal frequency division multiplexed (OFDM) wireless communication systems
US6560273B1 (en) * 1998-10-07 2003-05-06 Ericsson Inc. Delay searcher and delay trackers interaction for new delays assignment to rake fingers
DE19857821A1 (de) * 1998-12-15 2000-06-29 Siemens Ag Verfahren und Kommunikationsanordnung zur Übermittlung von Informationen mit Hilfe eines Multiträgerverfahrens
US6456654B1 (en) * 1998-12-22 2002-09-24 Nortel Networks Limited Frame alignment and time domain equalization for communications systems using multicarrier modulation
US6452991B1 (en) * 1998-12-30 2002-09-17 Ericsson Inc. Systems and methods for acquiring channel synchronization in time division multiple access communications systems using dual detection thresholds
US6654429B1 (en) 1998-12-31 2003-11-25 At&T Corp. Pilot-aided channel estimation for OFDM in wireless systems
US6111919A (en) * 1999-01-20 2000-08-29 Intellon Corporation Synchronization of OFDM signals
US6487252B1 (en) * 1999-01-29 2002-11-26 Motorola, Inc. Wireless communication system and method for synchronization
US6985548B1 (en) * 1999-02-03 2006-01-10 Conexant Systems, Inc. System and method for timing recovery in a discrete multi-tone system
US6539063B1 (en) 1999-02-18 2003-03-25 Ibiquity Digital Corporation System and method for recovering symbol timing offset and carrier frequency error in an OFDM digital audio broadcast system
US7643540B2 (en) * 1999-03-15 2010-01-05 Lg Electronics Inc. Pilot signals for synchronization and/or channel estimation
US6791960B1 (en) 1999-03-15 2004-09-14 Lg Information And Communications, Ltd. Pilot signals for synchronization and/or channel estimation
KR100294711B1 (ko) * 1999-03-15 2001-07-12 서평원 최적의 파일럿 심볼을 이용한 프레임 동기 방법
US6721299B1 (en) * 1999-03-15 2004-04-13 Lg Information & Communications, Ltd. Pilot signals for synchronization and/or channel estimation
KR100308151B1 (ko) * 1999-06-19 2001-11-14 서평원 샘플링된 상관 결과를 이용한 프레임 동기 확인 방법
US7012906B1 (en) * 1999-03-15 2006-03-14 Lg Information & Communications, Ltd. Pilot signals for synchronization and/or channel estimation
US7496132B2 (en) * 1999-03-15 2009-02-24 Kg Electronics Inc. Pilot signals for synchronization and/or channel estimation
US6269132B1 (en) 1999-04-26 2001-07-31 Intellon Corporation Windowing function for maintaining orthogonality of channels in the reception of OFDM symbols
US6074086A (en) * 1999-04-26 2000-06-13 Intellon Corporation Synchronization of OFDM signals with improved windowing
JP3650390B2 (ja) * 1999-05-21 2005-05-18 富士通株式会社 ディジタル加入者線伝送方法及びｘＤＳＬ装置
DE69937912T2 (de) 1999-05-21 2008-12-24 Fujitsu Ltd., Kawasaki Digitales Teilnehmerleitungsverfahren, -gerät und -system unter Verwendung synchroner Verarbeitung
US6608864B1 (en) 1999-05-26 2003-08-19 3Com Corporation Method and apparatus for fault recovery in a decision feedback equalizer
US6785349B1 (en) * 1999-05-28 2004-08-31 3Com Corporation Correlation based method of determining frame boundaries of data frames that are periodically extended
SE521513C2 (sv) * 1999-06-04 2003-11-11 Ericsson Telefon Ab L M Förfarande och anordning i ett flertonstransmissionssystem
US6320901B1 (en) 1999-06-15 2001-11-20 National Semiconductor Corporation Method for fast off-line training for discrete multitone transmissions
US6930995B1 (en) 1999-06-23 2005-08-16 Cingular Wireless Ii, Llc Apparatus and method for synchronization in a multiple-carrier communication system by observing a plurality of synchronization indicators
US6252902B1 (en) * 1999-09-13 2001-06-26 Virata Corporation xDSL modem having DMT symbol boundary detection
US6233276B1 (en) 1999-09-13 2001-05-15 Virata Corporation XDSL modem having time domain filter for ISI mitigation
DE19944495C2 (de) * 1999-09-17 2002-01-03 Bosch Gmbh Robert Verfahren zum Empfang von Funksignalen über einen Funkkanal
US7072412B1 (en) 1999-11-09 2006-07-04 Maurice Bellanger Multicarrier digital transmission system using an OQAM transmultiplexer
US6813325B1 (en) * 1999-12-22 2004-11-02 Globespanvirata, Inc System and method to reduce transmit wander in a digital subscriber line
US20020008525A1 (en) * 2000-02-29 2002-01-24 Ernest Seagraves TTR phase change detection and hyperframe alignment for DSL
US7088765B1 (en) * 2000-03-15 2006-08-08 Ndsu Research Foundation Vector calibration system
JP3732707B2 (ja) * 2000-03-16 2006-01-11 富士通株式会社 加入者側通信装置における再同期制御装置および再同期方法
US6529868B1 (en) * 2000-03-28 2003-03-04 Tellabs Operations, Inc. Communication system noise cancellation power signal calculation techniques
JP3440919B2 (ja) * 2000-04-07 2003-08-25 日本電気株式会社 マルチパス検出回路
US20020048333A1 (en) * 2000-05-25 2002-04-25 Nadeem Ahmed Joint detection in OFDM systems
DE10026325B4 (de) * 2000-05-26 2006-01-19 Robert Bosch Gmbh Verfahren zur Synchronisation von OFDM-Symbolen bei Rundfunkübertragungen
US8363744B2 (en) 2001-06-10 2013-01-29 Aloft Media, Llc Method and system for robust, secure, and high-efficiency voice and packet transmission over ad-hoc, mesh, and MIMO communication networks
WO2001097478A2 (en) * 2000-06-13 2001-12-20 At & T Wireless Services, Inc. Frame synchronization in a multicarrier communication system
US6975585B1 (en) 2000-07-27 2005-12-13 Conexant Systems, Inc. Slotted synchronous frequency division multiplexing for multi-drop networks
US6885696B2 (en) * 2000-07-28 2005-04-26 Nortel Networks Limited Notifying bit allocation changes in a multicarrier modulation communications system
AU2001278109A1 (en) * 2000-08-01 2002-02-13 Aware, Inc. Systems and methods for transporting a network timing reference in an adsl system
CA2361247C (en) * 2000-11-06 2008-10-07 Ntt Docomo, Inc. Transmitter, transmitting method, receiver, and receiving method for mc-cdma communication system
US6999508B1 (en) * 2000-11-07 2006-02-14 Texas Instruments Incorporated Multi-channel frequency domain equalizer for radio frequency interference cancellation
US6438367B1 (en) * 2000-11-09 2002-08-20 Magis Networks, Inc. Transmission security for wireless communications
US7023881B1 (en) * 2000-12-22 2006-04-04 Applied Micro Circuits Corporation System and method for selectively scrambling multidimensional digital frame structure communications
JP2002237807A (ja) * 2001-02-09 2002-08-23 Alps Electric Co Ltd フレーム同期信号検出方式
KR100363174B1 (ko) * 2001-02-15 2002-12-05 삼성전자 주식회사 비 정상 동기 신호를 처리하는 영상 표시 제어 장치 및 그방법
DE10115221A1 (de) 2001-03-28 2002-10-10 Bosch Gmbh Robert Verfahren zur Rahmen- und Frequenzsynchronisation eines OFDM-Signals und Verfahren zum Senden eines OFDM-Signals
US7012981B2 (en) * 2001-04-17 2006-03-14 Cyntrust Communications, Inc. Method and apparatus for improving data frame synchronization in a low SNR environment
US20040240535A1 (en) * 2001-05-10 2004-12-02 Amit Verma Fast exchange during intialization in multicarrier communication systems
US20090031419A1 (en) 2001-05-24 2009-01-29 Indra Laksono Multimedia system and server and methods for use therewith
US8291457B2 (en) 2001-05-24 2012-10-16 Vixs Systems, Inc. Channel selection in a multimedia system
EP2432190A3 (en) 2001-06-27 2014-02-19 SKKY Incorporated Improved media delivery platform
US7010028B2 (en) * 2001-07-16 2006-03-07 Broadcom Corporation System and method for rapid generation of low par Q-mode signals
US7161987B2 (en) 2001-09-26 2007-01-09 Conexant, Inc. Single-carrier to multi-carrier wireless architecture
US7170880B2 (en) * 2001-10-16 2007-01-30 Conexant, Inc. Sample rate change between single-carrier and multi-carrier waveforms
US20030081538A1 (en) * 2001-10-18 2003-05-01 Walton Jay R. Multiple-access hybrid OFDM-CDMA system
US7215685B2 (en) * 2001-11-30 2007-05-08 Intel Corporation Frame aligning deframer
KR20040068616A (ko) * 2002-01-07 2004-07-31 코닌클리케 필립스 일렉트로닉스 엔.브이. 반복 상관 시스템을 통해 탐색하는 셀을 위한 모바일 단말
JP3860762B2 (ja) * 2002-02-14 2006-12-20 株式会社エヌ・ティ・ティ・ドコモ 移動通信システム、チャネル同期確立方法、及び移動局
US7376157B1 (en) * 2002-03-08 2008-05-20 Centillium Communications, Inc. Synchronizing ADSL Annex C transceivers to TTR
US7050521B1 (en) * 2002-05-13 2006-05-23 Analog Devices, Inc. Frequency assisted digital timing recovery
KR100476896B1 (ko) * 2002-05-22 2005-03-17 삼성전자주식회사 티씨엠-아이에스디엔 라인과 공존하는 디지털 가입자라인을 이용한 통신 시스템 및 그것의 프레임 동기화 방법
US7062282B2 (en) * 2002-07-19 2006-06-13 Mediatek, Inc. Method and apparatus for frequency synchronization in a digital transmission system
US6996189B1 (en) 2002-07-26 2006-02-07 Jabil Circuit, Inc. Symmetric spherical QAM constellation
JP4558486B2 (ja) * 2002-08-14 2010-10-06 オアシス・シリコン・システムズ・インコーポレーテッド 位相ロック・ループ、サンプル・レート変換、またはネットワーク・フレーム・レートから生成される同期クロックを用いて、ネットワーク・フレーム・レートでデータをネットワークに送信し、ネットワークから受信するための通信システム
TW583855B (en) * 2002-08-22 2004-04-11 Mediatek Inc Wireless communication device for transmitting RF signals
JP4318510B2 (ja) * 2002-08-28 2009-08-26 パナソニック株式会社 通信装置および通信方法
JP3480466B2 (ja) * 2002-09-17 2003-12-22 富士通株式会社 ディジタル加入者線伝送方法及びｘＤＳＬ装置
US7551640B1 (en) * 2002-09-20 2009-06-23 Cisco Technology, Inc. Method and apparatus for errorless frame timing adjustment
KR100920737B1 (ko) * 2002-10-19 2009-10-07 삼성전자주식회사 다중반송파 수신시스템의 수신성능을 향상시킬 수 있는다중반송파 전송시스템 및 그 전송방법
JP3973543B2 (ja) * 2002-11-20 2007-09-12 三洋電機株式会社 受信方法と装置
GB2422278B (en) * 2002-12-03 2007-04-04 Synad Technologies Ltd Method and device for synchronisation in OFDM
JP3573152B2 (ja) * 2003-02-14 2004-10-06 富士通株式会社 ディジタル加入者線伝送方法及びｘＤＳＬ装置
JP3480469B2 (ja) * 2003-02-14 2003-12-22 富士通株式会社 ディジタル加入者線伝送方法
US7406125B2 (en) * 2003-04-09 2008-07-29 Jabil Circuit, Inc. Method for initialization of per tone frequency domain equalizer (FEQ) through noise reduction for multi-tone based modems
US8230094B1 (en) * 2003-04-29 2012-07-24 Aol Inc. Media file format, system, and method
US7385617B2 (en) * 2003-05-07 2008-06-10 Illinois Institute Of Technology Methods for multi-user broadband wireless channel estimation
US7342980B2 (en) * 2003-12-30 2008-03-11 Intel Corporation Estimating carrier phase in communication systems
US7561626B2 (en) * 2004-06-09 2009-07-14 Marvell World Trade Ltd. Method and system for channel estimation in a data transmission system
US7643582B2 (en) 2004-06-09 2010-01-05 Marvell World Trade Ltd. Method and system for determining symbol boundary timing in a multicarrier data transmission system
US7697619B2 (en) * 2004-06-09 2010-04-13 Marvell World Trade Ltd. Training sequence for channel estimation in a data transmission system
US7817730B2 (en) * 2004-06-09 2010-10-19 Marvell World Trade Ltd. Training sequence for symbol boundary detection in a multicarrier data transmission system
US7492736B2 (en) * 2004-10-29 2009-02-17 Texas Instruments Incorporated System and method for access and management of beacon periods in distributed wireless networks
US7561627B2 (en) * 2005-01-06 2009-07-14 Marvell World Trade Ltd. Method and system for channel equalization and crosstalk estimation in a multicarrier data transmission system
US7564775B2 (en) 2005-04-29 2009-07-21 Qualcomm, Incorporated Timing control in orthogonal frequency division multiplex systems based on effective signal-to-noise ratio
TW200718142A (en) * 2005-08-16 2007-05-01 Wionics Research Frame synchronization
KR101055546B1 (ko) * 2006-08-18 2011-08-08 후지쯔 가부시끼가이샤 노드들 사이의 무선 데이터 프레임 구조
US20080056343A1 (en) * 2006-08-30 2008-03-06 Ravikiran Rajagopal Frame synchronization
CN101179372B (zh) * 2006-11-07 2010-09-15 海能达通信股份有限公司 数字通信系统的链路帧同步系统及方法
US7787523B2 (en) * 2006-12-01 2010-08-31 Broadcom Corporation Method and system for delay matching in a rake receiver for WCDMA closed loop modes
EP1962448A1 (de) * 2007-02-23 2008-08-27 INOVA Semiconductors GmbH Verfahren und Vorrichtung zum Übertragen eines seriellen Datenrahmens
KR100899139B1 (ko) 2007-07-19 2009-05-27 인하대학교 산학협력단 무선 통신 시스템 기반 ｆｆｔ를 이용한 수신 장치 및 방법
GB2454262B (en) * 2007-11-05 2011-02-09 British Broadcasting Corp Signal discovery
JP2009118388A (ja) * 2007-11-09 2009-05-28 Nec Electronics Corp 受信装置
US8583067B2 (en) * 2008-09-24 2013-11-12 Honeywell International Inc. Apparatus and method for improved wireless communication reliability and performance in process control systems
US20100183060A1 (en) * 2009-01-19 2010-07-22 Electronics And Telecommunications Research Institute Method and apparatus of frequency offset-free frame synchronization for high order qam signals in modem apparatus
US20100287402A1 (en) * 2009-05-11 2010-11-11 Electronics And Telecommunications Research Institute Timestamping apparatus and method
WO2011022566A1 (en) * 2009-08-20 2011-02-24 Alfred E. Mann Foundation For Scientific Research Optimal narrowband interference removal for signals separated in time
CN101742013B (zh) * 2009-12-22 2012-12-05 中兴通讯股份有限公司 一种模拟用户线接入复用系统及方法
EP2341654B1 (en) * 2009-12-30 2016-09-14 Lantiq Deutschland GmbH Bit allocation in a multicarrier system
US10271407B2 (en) 2011-06-30 2019-04-23 Lutron Electronics Co., Inc. Load control device having Internet connectivity
US9544977B2 (en) 2011-06-30 2017-01-10 Lutron Electronics Co., Inc. Method of programming a load control device using a smart phone
US9386666B2 (en) 2011-06-30 2016-07-05 Lutron Electronics Co., Inc. Method of optically transmitting digital information from a smart phone to a control device
US20130222122A1 (en) 2011-08-29 2013-08-29 Lutron Electronics Co., Inc. Two-Part Load Control System Mountable To A Single Electrical Wallbox
US20140161000A1 (en) * 2012-12-10 2014-06-12 Futurewei Technologies, Inc. Timing offset correction in a tdd vectored system
US9413171B2 (en) 2012-12-21 2016-08-09 Lutron Electronics Co., Inc. Network access coordination of load control devices
US10019047B2 (en) 2012-12-21 2018-07-10 Lutron Electronics Co., Inc. Operational coordination of load control devices for control of electrical loads
US10244086B2 (en) 2012-12-21 2019-03-26 Lutron Electronics Co., Inc. Multiple network access load control devices
US10135629B2 (en) 2013-03-15 2018-11-20 Lutron Electronics Co., Inc. Load control device user interface and database management using near field communication (NFC)
US9282525B2 (en) 2013-06-24 2016-03-08 Freescale Semiconductor, Inc. Frequency-domain symbol and frame synchronization in multi-carrier systems
US9106499B2 (en) 2013-06-24 2015-08-11 Freescale Semiconductor, Inc. Frequency-domain frame synchronization in multi-carrier systems
US9100261B2 (en) 2013-06-24 2015-08-04 Freescale Semiconductor, Inc. Frequency-domain amplitude normalization for symbol correlation in multi-carrier systems
EP4160974A1 (en) * 2015-07-06 2023-04-05 Telefonaktiebolaget LM ERICSSON (PUBL) Resource allocation for data transmission in wireless systems
KR102205792B1 (ko) 2016-03-31 2021-01-22 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. 원격 측정 애플리케이션들에 대한 간섭에 강한 패킷 검출을 위한 최적화된 프리앰블 및 방법
US10020838B2 (en) 2016-09-23 2018-07-10 Microsoft Technology Licensing, Llc Sequence generation for spread spectrum from signal sampling
US10447338B2 (en) * 2016-09-23 2019-10-15 Microsoft Technology Licensing, Llc Orthogonal spreading sequence creation using radio frequency parameters
US11764940B2 (en) 2019-01-10 2023-09-19 Duality Technologies, Inc. Secure search of secret data in a semi-trusted environment using homomorphic encryption

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203071A (en) * 1978-08-08 1980-05-13 The Charles Stark Draper Laboratory, Inc. Pseudo-random-number-code-detection and tracking system
US4365338A (en) * 1980-06-27 1982-12-21 Harris Corporation Technique for high rate digital transmission over a dynamic dispersive channel
US4450558A (en) * 1981-01-12 1984-05-22 General Datacomm Industries, Inc. Method and apparatus for establishing frame synchronization
US4644523A (en) * 1984-03-23 1987-02-17 Sangamo Weston, Inc. System for improving signal-to-noise ratio in a direct sequence spread spectrum signal receiver
US4888769A (en) * 1985-12-06 1989-12-19 Tiw Systems, Inc. TDMA terminal controller
JPH0666745B2 (ja) * 1988-04-06 1994-08-24 日本電気株式会社 フレーム同期方式
FR2658017B1 (fr) 1990-02-06 1992-06-05 France Etat Procede de diffusion de donnees numeriques, notamment pour la radiodiffusion a haut debit vers des mobiles, a entrelacement temps-frequence et aide a l'acquisition de la commande automatique de frequence, et recepteur correspondant.
GB9020170D0 (en) * 1990-09-14 1990-10-24 Indep Broadcasting Authority Orthogonal frequency division multiplexing
US5343499A (en) 1990-06-12 1994-08-30 Motorola, Inc. Quadrature amplitude modulation synchronization method
US5170413A (en) * 1990-12-24 1992-12-08 Motorola, Inc. Control strategy for reuse system assignments and handoff
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
DE4128713A1 (de) * 1991-08-29 1993-03-04 Daimler Benz Ag Verfahren und anordnung zur messung der traegerfrequenzablage in einem mehrkanaluebertragungssystem
US5440561A (en) * 1991-09-30 1995-08-08 Motorola, Inc. Method for establishing frame synchronization within a TDMA communication system
WO1993006917A1 (en) * 1991-09-30 1993-04-15 Exxon Chemical Patents Inc. Microfiltration of zeolites
FR2682249B1 (fr) * 1991-10-08 1993-12-03 Thomson Csf Procede de demodulation numerique d'un signal composite.
US5241544A (en) * 1991-11-01 1993-08-31 Motorola, Inc. Multi-channel tdm communication system slot phase correction
JPH05304519A (ja) * 1992-04-02 1993-11-16 Nec Corp フレーム同期回路
US5285474A (en) * 1992-06-12 1994-02-08 The Board Of Trustees Of The Leland Stanford, Junior University Method for equalizing a multicarrier signal in a multicarrier communication system
US5299236A (en) * 1992-11-13 1994-03-29 Toshiba America Information Systems, Inc. System and method for obtaining and maintaining synchronization of a demodulated signal
US5590160A (en) * 1992-12-30 1996-12-31 Nokia Mobile Phones Ltd. Symbol and frame synchronization in both a TDMA system and a CDMA
ES2159540T3 (es) * 1993-02-08 2001-10-16 Koninkl Philips Electronics Nv Receptor, con multiplexor de division ortogonal de frecuencia, con compensacion para retardos diferenciales.
US5305349A (en) * 1993-04-29 1994-04-19 Ericsson Ge Mobile Communications Inc. Quantized coherent rake receiver
US5479447A (en) 1993-05-03 1995-12-26 The Board Of Trustees Of The Leland Stanford, Junior University Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines
SE500986C2 (sv) * 1993-07-20 1994-10-17 Telia Ab Förfarande och anordning för synkronisering i digitalt transmissionssystem av typen OFDM
US5386590A (en) * 1993-07-28 1995-01-31 Celeritas Technologies, Ltd. Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
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
US5400322A (en) 1993-08-20 1995-03-21 Amati Communications Corp. Updating of bit allocations in a multicarrier modulation transmission system
US5666378A (en) * 1994-03-18 1997-09-09 Glenayre Electronics, Inc. High performance modem using pilot symbols for equalization and frame synchronization
US6549512B2 (en) * 1997-06-25 2003-04-15 Texas Instruments Incorporated MDSL DMT architecture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100713470B1 (ko) * 2000-08-03 2007-04-30 삼성전자주식회사 다중 캐리어를 사용하는 통신 방식에서 초기 동기획득 장치

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AU696798B2 (en) 1998-09-17
US20020094049A1 (en) 2002-07-18
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CN1233137C (zh) 2005-12-21
FI970161A (fi) 1997-03-14
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US6359933B1 (en) 2002-03-19
US5627863A (en) 1997-05-06
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US5901180A (en) 1999-05-04
US6912261B2 (en) 2005-06-28
DE69513834T2 (de) 2000-07-06
CA2347252A1 (en) 1996-02-01
JP2004147345A (ja) 2004-05-20
US20040199554A1 (en) 2004-10-07
FI970161A0 (fi) 1997-01-15
KR100417815B1 (ko) 2004-05-31
CN1095260C (zh) 2002-11-27
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FI115685B (fi) 2005-06-15
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AU3006695A (en) 1996-02-16
CN1352504A (zh) 2002-06-05
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