公开(公告)号：CA2714748A1

公开(公告)日：2011-04-30

申请号：CA2714748

申请日：2010-09-08

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SUNG-IK ,  LIM HYOUNGSOO ,  KIM HEUNG-MOOK ,  KANG DONGHOON ,  OH WANGROK

IPC: H04L23/02 ,  H03D7/00 ,  H03M9/00 ,  H04B1/68 ,  H04H20/00 ,  H04L27/32

Abstract: A transmitter for transmitting data in a communication system includes: a serial/parallel (S/P) conversion unit configured to convert data into an I signal and a Q signal; multiplication units configured to multiply the converted I and Q signals by orthogonal sequences, respectively; conversion units configured to Hilbert-transform the I and Q signals multiplied by the orthogonal sequences; addition units configured to add the I and Q signals multiplied by the orthogonal sequences and the Hilbert-transformed Q and I signal, respectively; and an intermediate frequency (IF)/radio frequency (RF) unit configured to up-convert the added I signal and the added Q signal and transmit the converted I and Q signals.

公开(公告)号：CA2713701A1

公开(公告)日：2011-04-30

申请号：CA2713701

申请日：2010-08-24

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SUNG-IK ,  KIM HEUNG-MOOK ,  OH WANGROK ,  KANG DONGHOON

IPC: H04H20/44 ,  H04H40/18

Abstract: An apparatus for transmitting data in a communication system includes: a processor configured to process broadcasting data regarding various types of digital broadcasts to be provided to users; an S/P converter configured to convert additional data of the broadcasting data into a parallel type; a phase selector configured to generate a phase selection value using additional data bits, except for a first additional data bit, of the converted parallel-type additional data; a sequence generator configured to generate a sequence using the first additional data bit and the phase selection value; and an adder configured to couple the generated sequence with the processed broadcasting data.

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.

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.

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

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

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.

公开(公告)号：BRPI0416673A

公开(公告)日：2007-02-13

申请号：BRPI0416673

申请日：2004-03-27

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SUNG-IK ,  KIM SEUNG-WON ,  KIM HYOUNG-NAM

IPC: H04N7/015 ,  H03M13/25 ,  H04L1/00 ,  H04L25/03 ,  H04L27/02 ,  H04N5/21 ,  H04N5/44

Abstract: A decision feedback equalizing apparatus and a method of decision feedback equalization make a channel property of an inferior receiving signal to mild by using a channel-matched filter and decrease decision errors of symbol detector output signals by using a trellis decoder with decreased complexity, whose trace back depth is 1 (TBD=1).

公开(公告)号：CA2553753A1

公开(公告)日：2005-07-28

申请号：CA2553753

申请日：2004-12-31

Applicant: KOREA ELECTRONICS TELECOMM

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

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

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 o n- channel repeater for reducing time delay by configuring and up-sampling a baseband signal, filtering the up-sampled baseband signal with an Equi-Rippl e (ER) filter or in a window method, and converting the filtered baseband sign al 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 sign al 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.

公开(公告)号：AU2003285812A1

公开(公告)日：2004-12-13

申请号：AU2003285812

申请日：2003-12-27

Applicant: KOREA ELECTRONICS TELECOMM

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

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

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.

公开(公告)号：EP2174430A4

公开(公告)日：2013-12-04

申请号：EP07833957

申请日：2007-11-09

Applicant: KOREA ELECTRONICS TELECOMM

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

IPC: H04B7/14 ,  H04B7/155 ,  H04B17/40

CPC classification number: H04B7/15585 ,  H04B1/525

公开(公告)号：EP1875633A4

公开(公告)日：2012-03-21

申请号：EP05822465

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 ,  H04B7/155

CPC classification number: H04B7/155 ,  H04B7/15564