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公开(公告)号：CA2543646A1
公开(公告)日：2005-05-06
申请号：CA2543646
申请日：2004-10-29
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： PARK SUNG-IK , LEE SOO-IN , KIM SEUNG-WON , LEE YONG-TAE , SEO JAE-HYUN
Abstract: Provided is an on-channel repeater and method thereof. The on-channel repeating apparatus includes: a receiving unit for receiving a Radio Frequency (RF) broadcast signal; a demodulating unit for converting the RF signal into a baseband signal; an equalizing unit for equalizing the baseband signal to generate an equalized baseband signal; a modulating unit for converting the equalized baseband signal into an RF signal; and a transmitting unit for transmitting the RF signal.
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公开(公告)号：CA2698669C
公开(公告)日：2014-08-05
申请号：CA2698669
申请日：2008-05-15
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE JAE-YOUNG , PARK SUNG-IK , EUM HO-MIN , SEO JAE-HYUN , KIM HEUNG-MOOK , LIM JONG-SOO , LEE SOO-IN
IPC: H04B7/14
Abstract: Provided is an identification signal analyzing apparatus and method for compensating power of a channel profile occurring at a conventional identification signal analyzing apparatus by using a power compensation. The identification signal analyzing apparatus includes: an identification signal generator for generating an identification signal identical to a known identification signal inserted by a transmission device; a partial correlator for calculating a correlation value between a received signal including the known identification signal inserted by the transmission device and the identification signal generated by the identification signal generator through a partial correlation; a power compensator for compensating power of the correlation value calculated by the partial correlator; and a channel profile extractor for extracting a channel profile from the correlation value compensated by the power compensator.
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公开(公告)号：CA2543646C
公开(公告)日：2012-12-18
申请号：CA2543646
申请日：2004-10-29
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： PARK SUNG-IK , LEE YONG-TAE , SEO JAE-HYUN , KIM SEUNG-WON , LEE SOO-IN , EUM HO-MIN
Abstract: Provided is an on-channel repeater and method thereof. The on-channel repeating apparatus includes: a receiving unit for receiving a Radio Frequency (RF) broadcast signal; a demodulating unit for converting the RF signal into a baseband signal; an equalizing unit for equalizing the baseband signal to generate an equalized baseband signal; a modulating unit for converting the equalized baseband signal into an RF signal; and a transmitting unit for transmitting the RF signal.
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公开(公告)号：CA2465014C
公开(公告)日：2009-01-06
申请号：CA2465014
申请日：2004-04-19
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE SOO-IN , KIM SEUNG-WON , SEO JAE-HYUN , LEE YONG-TAE , PARK SUNG-IK
Abstract: Provided is a modulation apparatus that can reduce time delay of on-channel repeaters in a terrestrial digital television broadcasting system. The time delay is caused by a filter during the modulation operation in the on-channel repeaters. The modulation apparatus of the present research includes: a baseband signal forming unit for forming a baseband signal by combining the output signals of an equalization unit with the pre-defined field/segment synchronization signals in the on-channel repeaters; a pilot inserting unit for inserting a pilot signal to the baseband signal; an up-sampling unit for up-sampling the baseband signal with the pilot signal; a VSB filtering unit for filtering the up-sampled baseband signal based on a Window technique and/or an Equi-Ripple filter to thereby form an in- phase (I) signal and a quadrature (Q) signal; an up-converting unit for up-converting the frequencies of the filtered I and Q signals to frequencies of an intermediate frequency (IF) band; an adding unit for adding the up-converted L and Q signals and converting a resultant signal into a digital VSB signal of the IF band; and a digital-to-analogue converting unit for converting the digital signal of the IF band to an analogue signal.
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公开(公告)号：CA2670747A1
公开(公告)日：2008-06-12
申请号：CA2670747
申请日：2007-11-30
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LIM JONG-SOO , SEO JAE-HYUN , LEE YONG-TAE , LEE SOO-IN , KIM HEUNG-MOOK , LEE JAE-YOUNG , EUM HO-MIN , PARK SUNG-IK
IPC: H04L25/20
Abstract: Provided are a distributed repeater for repeating output signals identica l to input signals through a channel different from that of main transmitter signals but identical to channels of other distributed repeaters, and a dis tributed repeating method thereof. The distributed repeater includes: a pre- processing unit configured to receive a radio frequency (RF) signal transmit ted from an external device and demodulate the RF signal into a baseband sig nal; an equalizer configured to equalize the baseband signal to correct a di stortion occurring on a transmission channel; an identification signal gener ation and insertion unit configured to generate an identification signal for identification of the distributed repeater and network conditioning, and in sert the identification signal in the equalized baseband signal; and a post- processing unit configured to convert the baseband signal from the identific ation signal generation and insertion unit into an RF signal, and send the R F signal.
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Patent Agency Ranking16.发明专利
公开(公告)号：MXPA06013059A
公开(公告)日：2007-02-14
申请号：MXPA06013059
申请日：2005-05-12
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM SEUNG-WON , PARK SUNG-IK , LEE YONG-TAE , EUM HO-MIN , SEO JAE-HYUN , LEE SOO-IN , KIM HEUNG-MOOK
Abstract: Se proporciona un aparato de sincronizacion de frecuencia y un metodo que puede sincronizar las frecuencias entre las senales de recepcion y las senales de transmision mediante extraer un error de portador y la informacion del error de regulacion de muestreo en un proceso de sincronizacion de la senal de recepcion desde un transmisor principal u otro repetidor y reflejarlos en la senal de transmision en un repetidor de canal activo. El aparato incluye un medio de recuperacion del portador para compensar un error de frecuencia del portador de una senal de recepcion; un medio de recuperacion de regulacion para compensar un error de regulacion de muestreo de la senal de recepcion; un medio reflector del error del portador para reflectar el error de frecuencia del portador extraido desde el medio de recuperacion del portador a una senal de transmision y un medio reflector del error de regulacion para reflejar el error de regulacion de muestreo extraido desde el medio de recuperacion de regulacion a la senal de transmision. La presente invencion se usa para formar una red de repeticion de canal activo en cualquier sistema de transmision incluyendo un sistema de transmision de television digital.
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公开(公告)号：CA2564044A1
公开(公告)日：2005-12-08
申请号：CA2564044
申请日：2005-05-12
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM SEUNG-WON , EUM HO-MIN , LEE YONG-TAE , KIM HEUNG-MOOK , SEO JAE-HYUN , PARK SUNG-IK , LEE SOO-IN
Abstract: Provided is a frequency synchronizing apparatus and method that can synchronize frequencies between receiving signals and transmitting signals b y extracting a carrier error and sampling timing error information in a synchronization process of the receiving signal from a main transmitter or another repeater and reflecting them in the transmitting signal in an on- channel repeater. The apparatus includes a carrier recovery means for compensating a carrier frequency error of a receiving signal; a timing recovery means for compensating a sampling timing error of the receiving signal; a carrier error reflecting means for reflecting the carrier frequenc y error extracted from the carrier recovery means to a transmitting signal; an d a timing error reflecting means for reflecting the sampling timing error extracted from the timing recovery means to the transmitting signal. The present invention is used to form an on-channel repeating network in any transmission system including a digital television broadcasting system.
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公开(公告)号：CA2465014A1
公开(公告)日：2005-04-29
申请号：CA2465014
申请日：2004-04-19
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： PARK SUNG-IK , SEO JAE-HYUN , LEE YONG-TAE , LEE SOO-IN , KIM SEUNG-WON
Abstract: Provided is a modulation apparatus that can reduce time delay of on-channel repeaters in a terrestrial digital television broadcasting system. The time delay is caused by a filter during the modulation operation in the on-channel repeaters. The modulation apparatus of the present research includes: a baseband signal forming unit for forming a baseband signal by combining the output signals of an equalization unit with the pre-defined field/segment synchronization signals in the on-channel repeaters; a pilot inserting unit for inserting a pilot signal to the baseband signal; an up-sampling unit for up-sampling the baseband signal with the pilot signal; a VSB filtering unit for filtering the up-sampled baseband signal based on a Window technique and/or an Equi-Ripple filter to thereby form an in- phase (I) signal and a quadrature (Q) signal; an up-converting unit for up-converting the frequencies of the filtered I and Q signals to frequencies of an intermediate frequency (IF) band; an adding unit for adding the up-converted L and Q signals and converting a resultant signal into a digital VSB signal of the IF band; and a digital-to-analogue converting unit for converting the digital signal of the IF band to an analogue signal.
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公开(公告)号：CA2564044C
公开(公告)日：2013-08-06
申请号：CA2564044
申请日：2005-05-12
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： EUM HO-MIN , LEE YONG-TAE , KIM SEUNG-WON , KIM HEUNG-MOOK , SEO JAE-HYUN , PARK SUNG-IK , LEE SOO-IN
Abstract: Provided is a frequency synchronizing apparatus and method that can synchronize frequencies between receiving signals and transmitting signals by extracting a carrier error and sampling timing error information in a synchronization process of the receiving signal from a main transmitter or another repeater and reflecting them in the transmitting signal in an on-channel repeater. The apparatus includes a carrier recovery means for compensating a carrier frequency error of a receiving signal; a timing recovery means for compensating a sampling timing error of the receiving signal; a carrier error reflecting means for reflecting the carrier frequency error extracted from the carrier recovery means to a transmitting signal; and a timing error reflecting means for reflecting the sampling timing error extracted from the timing recovery means to the transmitting signal. The present invention is used to form an on-channel repeating network in any transmission system including a digital television broadcasting system.
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公开(公告)号：CA2698669A1
公开(公告)日：2009-03-12
申请号：CA2698669
申请日：2008-05-15
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE JAE-YOUNG , PARK SUNG-IK , EUM HO-MIN , SEO JAE-HYUN , KIM HEUNG-MOOK , LIM JONG-SOO , LEE SOO-IN
IPC: H04B7/14
Abstract: Provided is an identification signal analyzing apparatus and method for compensating power of a channel profile occurring at a conventional identification signal analyzing apparatus by using a power compensation. The identification signal analyzing apparatus includes: an identification signal generator for generating an identification signal identical to a known identification signal inserted by a transmission device; a partial correlator for calculating a correlation value between a received signal including the known identification signal inserted by the transmission device and the identification signal generated by the identification signal generator through a partial correlation; a power compensator for compensating power of the correlation value calculated by the partial correlator; and a channel profile extractor for extracting a channel profile from the correlation value compensated by the power compensator.
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