WO2005117433A1 - Apparatus and method for corresponding frequency synchronization in on-channel repeater - Google Patents

Apparatus and method for corresponding frequency synchronization in on-channel repeater Download PDF

Info

Publication number
WO2005117433A1
WO2005117433A1 PCT/KR2005/001394 KR2005001394W WO2005117433A1 WO 2005117433 A1 WO2005117433 A1 WO 2005117433A1 KR 2005001394 W KR2005001394 W KR 2005001394W WO 2005117433 A1 WO2005117433 A1 WO 2005117433A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier
error
frequency
signal
reflecting
Prior art date
Application number
PCT/KR2005/001394
Other languages
English (en)
French (fr)
Inventor
Ho-Min Eum
Yong-Tae Lee
Seung- Won Kim
Heung-Mook Kim
Jae-Hyun Seo
Sung-Ik Park
Soo-In Lee
Original Assignee
Electronics And Telecommunications Research Institute
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 Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to US11/579,657 priority Critical patent/US7773665B2/en
Priority to MXPA06013059A priority patent/MXPA06013059A/es
Priority to CA2564044A priority patent/CA2564044C/en
Publication of WO2005117433A1 publication Critical patent/WO2005117433A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/59—Responders; Transponders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/71—Wireless systems
    • H04H20/72—Wireless systems of terrestrial networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • an object of the present invention to provide a frequency synchronizing apparatus for synchronizing the frequency of a transmitting signal with the frequency of a receiving signal by extracting a carrier error and sampling timing error information in a synchronization process of a signal received from a main transmitter or another repeater and reflecting them to the transmitting signal in an on-channel repeater, and a method thereof.
  • a frequency synchronizing apparatus for an on-channel repeater receiving signals and distributing the signals on one channel, which includes: a carrier recovery unit for correcting a carrier frequency error of a receiving signal; a timing recovery unit for correcting a sampling timing error of the receiving signal; a carrier error reflecting unit for reflecting the carrier frequency error extracted from the carrier recovery unit to a transmitting signal; and a timing error reflecting unit for reflecting the sampling timing error extracted from the timing recovery unit to the transmitting signal.
  • a frequency synchronizing apparatus for an on-channel repeater receiving signals and distributing the signals on one channel, which includes: an analog-digital converter for converting an analog receiving signal into a digital signal; a carrier recovery unit for correcting a carrier frequency error of the digital signal; a timing recovery unit for correcting a sampling timing error of the digital signal; a carrier error reflecting unit for reflecting the carrier frequency error extracted from the carrier recovery unit to a transmitting signal; a digital-analog converter for converting the transmitting signal with the carrier frequency error into an analog signal; and a voltage controlling oscillator for reflecting the sampling timing error extracted from the timing recovery unit in an oscillation signal and providing the oscillation signal to the analog-digital converter and the digital-analog converter.
  • Fig. 1 is a diagram showing a service employing conventional repeaters according to an embodiment of prior art
  • Fig. 2 is a diagram showing a service employing conventional repeaters according to another embodiment of the present invention
  • Fig. 3 is a block diagram illustrating an on-channel repeater in accordance with an embodiment of the present invention
  • Fig. 4 is a block diagram describing an on-channel repeater in accordance with another embodiment of the present invention
  • Fig. 1 is a diagram showing a service employing conventional repeaters according to an embodiment of prior art
  • Fig. 2 is a diagram showing a service employing conventional repeaters according to another embodiment of the present invention
  • Fig. 3 is a block diagram illustrating an on-channel repeater in accordance with an embodiment of the present invention
  • Fig. 4 is a block diagram describing an on-channel repeater in accordance with another embodiment of the present invention
  • FIG. 9 is a block diagram describing a carrier error reflecting unit and a timing error reflecting unit of Fig. 6 in accordance with another embodiment of the present invention
  • Fig. 10 is a block diagram illustrating a digital- analog frequency synchronizing apparatus for an on-channel repeater in accordance with an embodiment of the present invention
  • Fig. 11 is a block diagram illustrating a digital frequency synchronizing apparatus for an on-channel repeater in accordance with an embodiment of the present invention
  • Fig. 12 is a block diagram illustrating a digital- analog frequency synchronizing apparatus for an on-channel repeater in accordance with another embodiment of the present invention
  • Fig. 10 is a block diagram illustrating a digital- analog frequency synchronizing apparatus for an on-channel repeater in accordance with an embodiment of the present invention
  • Fig. 12 is a block diagram illustrating a digital- analog frequency synchronizing apparatus for an on-channel repeater in accordance with another embodiment of the present invention
  • FIG. 13 is a flowchart describing a digital frequency synchronizing method for an on-channel repeater in accordance with an embodiment of the present invention
  • Fig. 14 is a flowchart describing a carrier frequency error reflecting method of Fig. 13 in accordance with an embodiment of the present invention
  • Fig. 15 is a flowchart describing a carrier frequency error reflecting method of Fig. 13 in accordance with another embodiment of the present invention
  • Fig. 16 is a flowchart describing a timing error reflecting method of Fig. 13 in accordance with an embodiment of the present invention
  • Fig. 17 is a flowchart describing a timing error reflecting method of Fig. 13 in accordance with another embodiment of the present invention.
  • Fig. 3 is a block diagram illustrating an on-channel repeater in accordance with an embodiment of the present invention. As shown in Fig.
  • the on-channel repeater of Fig. 4 includes a receiving antenna 401, an RF receiver 402, an intermediate frequency (IF) down-converter 403, a demodulator 404, an equalizer 405, a modulator 406, an RF up-converter 407, a high-power amplifier 408 > a transmitting antenna 409, and a local oscillator (LO) 410.
  • the RF receiver 402 receives the RF signals transmitted from the main transmitter through the receiving antennal 401, and the IF down-converter 403 down-converts the frequency of the received RF signals into IF signals based on the reference frequency provided from the LO 410.
  • Fig. 5 is a block diagram describing an on-channel repeater synchronizing the frequency of a transmitting signal with that of a receiving signal by using a Global Positioning System (GPS) signal in accordance with an embodiment of the present invention.
  • the on-channel repeater further includes a GPS receiver 411.
  • the GPS receiver 411 divides a GPS reference signal received from the outside and provides oscillation signals needed for analog-digital conversion (ADC) of the demodulator 404 and the digital-analog conversion (DAC) of the modulator 406.
  • ADC analog-digital conversion
  • DAC digital-analog conversion
  • the frequency synchronizing apparatus for an on- channel repeater which is suggested in the present invention, can be classified into a digital type when fixed voltage is used as an input to a voltage controlling oscillator providing an oscillation frequency used for analog-digital conversion and digital-analog conversion and into a digital-analog type when an output from the timing recovery unit is used.
  • Fig. 6 is a block diagram illustrating a digital frequency synchronizing apparatus for an on-channel repeater in accordance with an embodiment of the present invention. As illustrated in Fig.
  • the timing recovery unit 910 includes a timing error detector 911 and a loop filter 912, and a voltage controlled oscillator 920 provides oscillation frequency to an analog-digital converter 930 and a digital-analog converter 940 based on a timing error outputted from the loop filter 912 of the timing recovery unit 910.
  • the carrier recovery unit 803 and the carrier error reflecting unit 808 are realized in the same structures as shown in Fig. 9, they can be realized in the structures of Fig. 8. Fig.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Radio Relay Systems (AREA)
PCT/KR2005/001394 2004-05-12 2005-05-12 Apparatus and method for corresponding frequency synchronization in on-channel repeater WO2005117433A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US11/579,657 US7773665B2 (en) 2004-05-12 2005-05-12 Apparatus and method for corresponding frequency synchronization in on-channel repeater
MXPA06013059A MXPA06013059A (es) 2004-05-12 2005-05-12 Aparato y metodo para sincronizacion de frecuencia correspondiente en un repetidor de canal activo.
CA2564044A CA2564044C (en) 2004-05-12 2005-05-12 Apparatus and method for corresponding frequency synchronization in on-channel repeater

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20040033656 2004-05-12
KR10-2004-0033656 2004-05-12

Publications (1)

Publication Number Publication Date
WO2005117433A1 true WO2005117433A1 (en) 2005-12-08

Family

ID=35451274

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/001394 WO2005117433A1 (en) 2004-05-12 2005-05-12 Apparatus and method for corresponding frequency synchronization in on-channel repeater

Country Status (6)

Country Link
US (1) US7773665B2 (ko)
KR (1) KR100613908B1 (ko)
CN (1) CN100531357C (ko)
CA (1) CA2564044C (ko)
MX (1) MXPA06013059A (ko)
WO (1) WO2005117433A1 (ko)

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WO2008069592A1 (en) * 2006-12-08 2008-06-12 Electronics And Telecommunications Research Institute Apparatus and method for synchronizing frequency in distributed repeater
WO2008110992A1 (en) * 2007-03-15 2008-09-18 Selex Communications S.P.A. Improvements to synchronization methods for single-frequency simulcast mobile radio communication networks
EP2232728A2 (en) * 2007-12-11 2010-09-29 Electronics and Telecommunications Research Institute Repeater and method for processing signal, and method for cnverting frequency thereof
CN102077488A (zh) * 2008-06-24 2011-05-25 爱立信电话股份有限公司 频率选择性重发的方法和布置

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US8279988B2 (en) * 2007-09-11 2012-10-02 Advanced Receiver Technologies, Llc Efficient channel estimate based timing recovery
KR100896795B1 (ko) 2007-11-21 2009-05-11 한국전자통신연구원 중계기 및 그의 신호 처리 방법과 그의 주파수 동기 변환방법
TWI407785B (zh) * 2009-06-08 2013-09-01 Himax Media Solutions Inc 數位中頻解調器
US8451386B2 (en) * 2009-06-08 2013-05-28 Himax Media Solutions, Inc. Digital intermediate frequency demodulator
US8831073B2 (en) 2009-08-31 2014-09-09 Sony Corporation Wireless transmission system, wireless communication device, and wireless communication method
CN101854497B (zh) * 2010-05-07 2013-04-03 深圳国微技术有限公司 数字电视接收机及其定时恢复方法
US8693554B2 (en) * 2011-09-12 2014-04-08 Nxp B.V. Capacitive communication circuit and method therefor
US20150285904A1 (en) * 2014-04-04 2015-10-08 Texas Instruments Incorporated Antenna configuration for parking assist radar
KR20160033916A (ko) 2014-09-19 2016-03-29 한국전자통신연구원 샘플링 레이트 컨버터 및 그 방법
KR20170126174A (ko) 2016-05-09 2017-11-17 한국전자통신연구원 계층분할다중화 방송 중계 장치 및 방법
DE102017207604B4 (de) * 2017-05-05 2019-11-28 Conti Temic Microelectronic Gmbh Radarsystem mit Überwachung der Frequenzmodulation einer Folge von gleichartigen Sendesignalen
CN108847877A (zh) * 2018-08-02 2018-11-20 西安安源智造机电设备有限公司 无线通信同频转发系统

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008069592A1 (en) * 2006-12-08 2008-06-12 Electronics And Telecommunications Research Institute Apparatus and method for synchronizing frequency in distributed repeater
WO2008110992A1 (en) * 2007-03-15 2008-09-18 Selex Communications S.P.A. Improvements to synchronization methods for single-frequency simulcast mobile radio communication networks
CN101682499A (zh) * 2007-03-15 2010-03-24 塞雷克斯通信股份有限公司 用于单频同播移动无线电通信网络的同步方法的改进
CN101682499B (zh) * 2007-03-15 2014-03-19 塞雷克斯通信股份有限公司 用于单频同播移动无线电通信网络的同步方法的改进
US8688155B2 (en) 2007-03-15 2014-04-01 Selex Communications S.P.A. Synchronization methods for single-frequency simulcast mobile radio communication networks
EP2232728A2 (en) * 2007-12-11 2010-09-29 Electronics and Telecommunications Research Institute Repeater and method for processing signal, and method for cnverting frequency thereof
EP2232728A4 (en) * 2007-12-11 2014-02-12 Korea Electronics Telecomm REPEATER AND SIGNAL PROCESSING METHOD, AND FREQUENCY CONVERTING METHOD THEREOF
CN102077488A (zh) * 2008-06-24 2011-05-25 爱立信电话股份有限公司 频率选择性重发的方法和布置
US8718540B2 (en) 2008-06-24 2014-05-06 Telefonaktiebolaget L M Ericsson (Publ) Methods and arrangements for frequency selective repetition

Also Published As

Publication number Publication date
MXPA06013059A (es) 2007-02-14
CA2564044C (en) 2013-08-06
US20090129450A1 (en) 2009-05-21
US7773665B2 (en) 2010-08-10
KR20060047837A (ko) 2006-05-18
CN1965580A (zh) 2007-05-16
CA2564044A1 (en) 2005-12-08
KR100613908B1 (ko) 2006-08-22
CN100531357C (zh) 2009-08-19

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