中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

30 records (took 0.023 seconds)

    APARATO Y METODO PARA LA MODULACION DE UN REPETIDOR DE CANAL.
    21.
    发明专利
    APARATO Y METODO PARA LA MODULACION DE UN REPETIDOR DE CANAL. 未知

    公开(公告)号：MXPA06008226A

    公开(公告)日：2007-04-16

    申请号：MXPA06008226

    申请日：2004-12-31

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： LEE YONG-TAE ,  KIM SEUNG-WON ,  EUM HO-MIN ,  SEO JAE-HYUN ,  LEE SOO-IN ,  PARK SUNG-IK ,  KIM HEUNG-MOOK

    IPC: H04N7/00 ,  H04N7/015 ,  H04B7/155 ,  H04N5/40

    Abstract: Se proporcionan un aparato y metodo de modulacion de un repetidor en canal. Un objeto de la presente invencion es proporcionar un aparato de modulacion de un repetidor en canal para reducir el retardo de tiempo al configurar y muestrear ascendentemente una senal de banda base, filtrar la senal de banda base muestreada ascendentemente con un filtro de Equi-Ondulacion (ER) o en un metodo de ventana, y convertir la senal de banda base filtrada en una senal de RF. El aparato de modulacion incluye: una unidad de configuracion de senal de banda base para configurar una senal de banda base al configurar un campo de entrada y una senal de sincronizacion de segmento; una unidad de adicion de piloto para agregar una senal piloto a la senal de banda base; una unidad de filtracion para filtrar la senal de banda base con la senal piloto; y una unidad de conversion ascendente de RF para convertir ascendentemente la senal filtrada en una senal de RF. La presente invencion se utiliza para formar una red de repeticion en canal en un sistema de transmision que incluye un sistema de difusion de TV digital.

    APARATO REPETIDOR EN CANAL Y METODO PARA EL SERVICIO DE TRANSMISION DE TELEVISION DIGITAL TERRESTRE.
    22.
    发明专利
    APARATO REPETIDOR EN CANAL Y METODO PARA EL SERVICIO DE TRANSMISION DE TELEVISION DIGITAL TERRESTRE. 未知

    公开(公告)号：MXPA05012578A

    公开(公告)日：2007-03-08

    申请号：MXPA05012578

    申请日：2003-12-27

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM SEUNG-WON ,  PARK SUNG-IK ,  LEE YONG-TAE ,  EUM HO-MIN ,  SEO JAE-HYUN ,  LEE SOO-IN

    IPC: H04N7/015 ,  H04H20/00 ,  H04H20/06 ,  H04N5/21 ,  H04N5/40 ,  H04N5/44 ,  H04N5/455

    Abstract: Se describe un repetidor y metodo para un servicio de servicio de difusion de TV digital terrestre de ATSC. El repetidor de canal activo incluye: una unidad de recepcion para recibir una senal de difusion de Radiofrecuencia (FR) desde un trasmisor principal; una unidad de conversion de enlace descendente de frecuencia para convertir la senal de difusion de RF recibida en una senal de frecuencia intermedia (IF); una unidad de desmodulacion para convertir la senal de IF convertida en una senal de banda base; una unidad de ecualizacion para remover una cierta senal innecesaria generada a partir de la senal de banda base convertida; una unidad de modulacion para convertir la senal de banda base en una senal de IF; una unidad de conversion de enlace ascendente de frecuencia para convertir la senal de IF en una senal de difusion de RF; una unidad de amplificacion de alta potencia para amplificar y repetir la senal de difusion de RF convertida; una unidad de transmision para transmitir la senal de difusion de RF producida de la unidad de amplificacion de alta potencia; y una unidad de sincronizacion de senal para generar la primera frecuencia de referencia, y generar la segunda frecuencia de referencia en la base de la primera frecuencia de referencia de manera que la senal de transmision/recepcion se sincronizan por frecuencia y fase.

    APPARATUS AND METHOD OF ON-CHANNEL REPEATER
    24.
    发明专利
    APPARATUS AND METHOD OF ON-CHANNEL REPEATER 未知

    公开(公告)号：CA2564236A1

    公开(公告)日：2005-11-17

    申请号：CA2564236

    申请日：2004-12-31

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： EUM HO-MIN ,  SEO JAE-HYUN ,  LEE YONG-TAE ,  KIM HEUNG-MOOK ,  PARK SUNG-IK ,  LEE SOO-IN ,  KIM SEUNG-WON

    IPC: H04N7/015 ,  H04B7/155 ,  H04L25/03 ,  H04L25/24 ,  H04N5/21 ,  H04N5/38

    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.

    ON-CHANNEL REPEATING APPARATUS AND METHOD FOR TERRESTRIAL DIGITAL TELEVISION BROADCASTING SERVICE
    25.
    发明专利
    ON-CHANNEL REPEATING APPARATUS AND METHOD FOR TERRESTRIAL DIGITAL TELEVISION BROADCASTING SERVICE 未知

    公开(公告)号：CA2454295A1

    公开(公告)日：2004-11-20

    申请号：CA2454295

    申请日：2003-12-29

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM SEUNG-WON ,  LEE SOO-IN ,  LEE YONG-TAE ,  PARK SUNG-IK

    IPC: H04N7/015 ,  H04H20/00 ,  H04H20/06 ,  H04N5/21 ,  H04N5/40 ,  H04N5/44 ,  H04N5/455 ,  H04N5/00 ,  H04H1/00 ,  H04B7/005

    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.

    APPARATUS AND METHOD FOR ESTIMATING INVERSE CHANNEL OF REPEATER'S RECEIVING CHANNEL
    27.
    发明公开
    APPARATUS AND METHOD FOR ESTIMATING INVERSE CHANNEL OF REPEATER'S RECEIVING CHANNEL 审中-公开
    装置和用于估计逆信道的接收信道AN放大器之间

    公开(公告)号：EP2188915A4

    公开(公告)日：2015-11-11

    申请号：EP08753331

    申请日：2008-05-06

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： PARK SUNG-IK ,  KIM HEUNG-MOOK ,  PARK SO-RA ,  LEE YONG-TAE ,  LIM JONG-SOO ,  LEE SOO-IN

    IPC: H04B7/26 ,  H04B7/155 ,  H04L25/02

    CPC classification number: H04L25/0212 ,  H04B7/155 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0228 ,  H04L25/0246

    Abstract: Provided is an apparatus and method for estimating inverse channel of a repeater's receiving channel, which ensures stability and causality by generating a time-domain filter coefficient having information on an inverse channel of repeater's receiving channel from a signal transmitted from a main transmitter or another repeater. The apparatus includes: a channel estimator for estimating a channel established by a transmission path from a received signal; an inverse minimum phase filter coefficient generator for generating inverse channel of a minimum phase channel from the estimated channel, and converting the inverse channel of the minimum phase channel into a time-domain filter coefficient; an inverse group delay filter coefficient generator for generating a time-domain filter coefficient by using the estimated channel and the minimum phase channel; and a combiner for generating an inverse channel of a receiving channel in a time domain by combining the filter coefficient and the filter coefficient.

Patent Agency Ranking