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11.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：CA2553753C
公开(公告)日：2013-06-04
申请号：CA2553753
申请日：2004-12-31
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： PARK SUNG-IK , LEE YONG-TAE , EUM HO-MIN , KIM HEUNG-MOOK , SEO JAE-HYUN , KIM SEUNG-WON , LEE SOO-IN
Abstract: Provided is a modulating apparatus and method of an on-channel repeater. An object of the present invention is to provide a modulating apparatus of an on-channel repeater for reducing time delay by configuring and up-sampling a baseband signal, filtering the up-sampled baseband signal with an Equi-Ripple (ER) filter or in a window method, and converting the filtered baseband signal into an RF signal. The modulating apparatus includes: a baseband signal configuring unit for configuring a baseband. signal by combining an input field and a segment sync signal; a pilot adding unit for adding a pilot signal to the baseband signal; a filtering unit for filtering the baseband signal with the pilot signal; and an RF up-converting unit for up-converting the filtered signal into an RF signal. The present invention is used to form an on-channel repeating network in a transmitting system including a digital TV broadcasting system.
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公开(公告)号：CA2564236C
公开(公告)日：2013-04-02
申请号：CA2564236
申请日：2004-12-31
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： SEO JAE-HYUN , LEE YONG-TAE , KIM HEUNG-MOOK , EUM HO-MIN , PARK SUNG-IK , KIM SEUNG-WON , LEE SOO-IN
Abstract: Provided are an on-channel repeater and a method thereof. The repeater receives signals on one channel and distributes the signals on the same channel by converting RF signals from a main transmitter into baseband signals; equalizing them in a high-performance equalizer; adding a repeater identifier to them; modulating the baseband signals with the repeater identifier into RF signals. The repeater includes: a receiver for receiving RF signals; a demodulator for demodulating the RF signals into baseband signals; an equalizer for equalizing the baseband signals; an adder for adding a repeater identifier to the baseband signals; a modulator for modulating the baseband signals with the repeater identifier added in the adder into RF signals; and a transmitter for transmitting the RF signals modulated in the modulator. The technology of the present invention is used to form an on-channel repeating network in an arbitrary transmission system including a digital television broadcasting system.
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公开(公告)号：CA2668058A1
公开(公告)日：2008-05-08
申请号：CA2668058
申请日：2007-10-12
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LIM JONG-SOO , PARK SUNG-IK , LEE SOO-IN , LEE JAE-YOUNG , KIM HEUNG-MOOK , EUM HO-MIN , SEO JAE-HYUN
IPC: H04B7/14
Abstract: Provided is an apparatus and method for analyzing identification (ID) sig nals by converting radio frequency (RF) signals which are transmitted with a n ID signal added thereto by a transmitting part, e.g., a plurality of trans mitters or repeaters, into signals of a desired band; creating ID signals th at are identical to the ID signals added to the RF signals; calculating corr elation values between the converted signals and the created ID signals base d on partial correlation; and extracting channel profile of multi-path signa ls caused by a channel between the transmitting part and the ID signal analy zing apparatus from the correlation value. The technology of the present res earch is applied to broadcasting and communication.
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Patent Agency Ranking
公开(公告)号：MXPA06013060A
公开(公告)日：2007-02-14
申请号：MXPA06013060
申请日：2004-12-31
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： SEO JAE-HYUN , PARK SUNG-IK , LEE YONG-TAE , KIM HEUNG-MOOK , EUM HO-MIN , KIM SEUNG-WON , LEE SOO-IN
Abstract: Se proporcionan un repetidor de canal activo y un metodo del mismo. El repetidor recibe las senales en un canal y distribuye las senales en el mismo canal mediante convertir las senales RF desde un transmisor principal en las senales de banda base; ecualizandolas en un ecualizador de alto rendimiento, agregando un identificador del repetidor a ellas, modulando las senales de banda base con el identificador del repetidor en las senales RF. El repetidor incluye: un receptor para recibir las senales RF; un demodulador para demodular las senales RF en las senales de banda base, un ecualizador para ecualizar las senales de banda base; un agregador para agregar un identificador del repetidor a las senales de banda base, un modulador para modular las senales de banda base con el identificador del repetidor agregado en el agregador en base senales RF y un transmisor para transmitir las senales RF moduladas en el modulador. La tecnologia de la presente invencion se usa para formar una red de repeticion de canal activo en un sistema de transmision arbitrario incluyendo un sistema de transmision de television digital.
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公开(公告)号：CA2605834C
公开(公告)日：2012-02-14
申请号：CA2605834
申请日：2005-12-29
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： PARK SUNG-IK , LEE YONG-TAE , EUM HO-MIN , KIM HEUNG-MOOK , SEO JAE-HYUN , KIM SEUNG-WON , LEE SOO-IN
IPC: H04B7/14
Abstract: Provided are an on-channel repeater and a method thereof. The on-channel repeater can extract reception channel information from signals transmitted from a main transmitter or another repeater, compensate for channel distortion caused on a transmission channel by inversely reflecting the extracted reception channel information to the received signals, and transmit the channel-distortion compensated signals through the same channel as a reception channel, and a method thereof. The on-channel repeater includes: a receiver for receiving RF signals transmitted from outside; a down-converter for down-converting the received RF signals into signals of a desired band; a channel-estimator for estimating an inverse value of a reception channel based on the down- converted signals; an adaptation filter for compensating for channel distortion by using a filter having the inverse value of the estimated reception channel; an up- converter for up-converting the channel distortion-compensated signals into RF signals; and a transmitter for transmitting the up-converted RF signals.
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公开(公告)号：MX2009005722A
公开(公告)日：2009-06-08
申请号：MX2009005722
申请日：2007-11-30
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： PARK SUNG-IK , LEE YONG-TAE , KIM HEUNG-MOOK , EUM HO-MIN , LEE SOO-IN , LEE JAE-YOUNG , SEO JAE-HYUN , LIM JONG-SOO
IPC: H04L25/20
Abstract: Se proporciona un repetidor distribuido para repetir señales de salida idénticas a las señales de entrada a través de un canal diferente al de las señales de transmisión principales, pero idéntico a los canales de otros repetidores distribuidos y un método de repetición distribuida del mismo. El repetidor distribuido incluye: Una unidad de pre-procesamiento configurada para recibir una señal de radiofrecuencia (RF) transmitida desde de un dispositivo externo y desmodular la señal de RF en una señal de banda base; un ecualizador configurado para ecualizar la señal de banda base para corregir una distorsión que ocurre en un canal de transmisión; una unidad de inserción y generación de señal de identificación configurada para generar una señal de identificación para identificación del repetidor distribuido y acondicionamiento de red e insertar la señal de identificación en la señal de banda base ecualizada; y una unidad de post-procesamiento configurado para convertir la señal de banda base de la unidad de inserción y generación de señal de identificación en una señal de RF y enviar la señal de RF.
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公开(公告)号：CA2686925A1
公开(公告)日：2008-11-20
申请号：CA2686925
申请日：2007-11-09
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： SEO JAE-HYUN , EUM HO-MIN , PARK SUNG-IK , LEE SOO-IN , KIM HEUNG-MOOK , LIM JONG-SOO , LEE JAE-YOUNG , LEE YONG-TAE
IPC: H04B7/14
Abstract: Provided is an on-channel repeater, which removes feedback signals caused due to low isolation of transmission/reception antennas and a method thereo f. The on-channel repeater includes : a receiver for receiving radio frequen cy (RF) signals and converting them into baseband signals; a subtractor for subtracting replicas of feedback signals from the baseband signals to thereb y produce signals whose feedback signals are primarily removed; a demodulato r for demodulating the signals which include the remaining feedback signals; an equalizer for equalizing the demodulated signals to thereby produce equa lized signals; a transmitter for modulating the equalized signals to thereby produce modulated signals, converting the modulated signals into RF signals , and transmitting the RF signals in the air; a down-converter for down-conv erting the RF signals into baseband signals; and a replica generator for cal culating the replicas based on the baseband signals of the down- converter a nd the signals without feedback signals of the subtractor, and feeding back them to the subtractor.
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20.发明专利
公开(公告)号：CA2454295C
公开(公告)日：2007-05-15
申请号：CA2454295
申请日：2003-12-29
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE SOO-IN , PARK SUNG-IK , LEE YONG-TAE , KIM SEUNG-WON , EUM HO-MIN , SEO JAE-HYUN
Abstract: A repeater and method for an ATSC terrestrial digital TV broadcasting service. The on-channel repeater includes: a receiving unit for receiving a Radio Frequency (RF) broadcast signal from a main transmitter; a frequency downlink converting unit for converting the received RF broadcast signal into an intermediate frequency (IF) signal; a demodulating unit for converting the converted IF signal into a baseband signal; an equalizing unit for removing noise and multi-path signals generated from the converted baseband signal; a modulating unit for converting the baseband signal into an IF signal; a frequency uplink converting unit for converting the IF signal into a RF broadcast signal; a high power amplifying unit for amplifying and repeating the converted RF broadcast signal; a transmitting unit for transmitting the RF broadcast signal outputted from the high power amplifying unit; and a signal synchronizing unit for generating the first reference frequency, and generating the second reference frequency based on the first reference frequency such that the transmission/reception signal are frequency-and-phase synchronized.
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