公开(公告)号：CA2881538A1

公开(公告)日：2015-08-13

申请号：CA2881538

申请日：2015-02-11

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SUNG-IK ,  KWON SUN-HYOUNG ,  LEE JAE-YOUNG ,  KIM HEUNG-MOOK ,  HUR NAM-HO

IPC: H03M13/11 ,  H03M13/27 ,  H03M13/31 ,  H04L1/24 ,  H04L27/34

Abstract: A modulator and a modulation method using a non-uniform 16-symbol signal constellation are disclosed. The modulator includes a memory and a processor. The memory receives a codeword corresponding to a low-density parity check (LDPC) code having a code rate of 2/15. The processor maps the codeword to 16 symbols of the non-uniform 16-symbol signal constellation on a 4-bit basis.

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

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 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.

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

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.

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.

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

IPC: H04L27/00 ,  H04B7/155 ,  H04N7/015 ,  H04L25/03 ,  H04L25/24 ,  H04N5/21 ,  H04N5/38 ,  H04N7/00

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.

公开(公告)号：CA2668058C

公开(公告)日：2016-03-29

申请号：CA2668058

申请日：2007-10-12

Applicant: KOREA ELECTRONICS TELECOMM

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

IPC: H04B7/14

Abstract: Provided is an apparatus and method for analyzing identification (ID) signals by converting radio frequency (RF) signals which are transmitted with an ID signal added thereto by a transmitting part, e.g., a plurality of transmitters or repeaters, into signals of a desired band; creating ID signals that are identical to the ID signals added to the RF signals; calculating correlation values between the converted signals and the created ID signals based on partial correlation; and extracting channel profile of multi-path signals caused by a channel between the transmitting part and the ID signal analyzing apparatus from the correlation value. The technology of the present research is applied to broadcasting and communication.

公开(公告)号：CA2864650A1

公开(公告)日：2016-02-14

申请号：CA2864650

申请日：2014-09-25

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SUNG-IK ,  KIM HEUNG-MOOK ,  KWON SUN-HYOUNG ,  HUR NAM-HO

IPC: H03M13/11 ,  H04N19/90

Abstract: A low density parity check (LDPC) encoder, an LDPC decoder, and an LDPC encoding method are disclosed. The LDPC encoder includes first memory, second memory, and a processor. The first memory stores an LDPC codeword having a length of 64800 and a code rate of 2/15. The second memory is initialized to 0. The processor generates the LDPC codeword corresponding to information bits by performing accumulation with respect to the second memory using a sequence corresponding to a parity check matrix (PCM).

公开(公告)号：MX2015006530A

公开(公告)日：2015-11-23

申请号：MX2015006530

申请日：2015-05-22

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SUNG-IK ,  KIM HEUNG-MOOK ,  KWON SUN-HYOUNG ,  HUR NAM-HO ,  LEE JAE-YOUNG ,  LIM BO-MI

IPC: H03M13/27

Abstract: En la presente descripción se describe un entrelazador de bits, un dispositivo de modulación codificada de bits entrelazados (BICM) y un método de entrelazado de bits; el entrelazador de bits incluye una primera memoria, un procesador y una segunda memoria; la primera memoria almacena una palabra código de revisión de paridad de baja densidad (LDPC) que tiene una longitud de 16200 y un índice de código de 3/15; el procesador genera una palabra código entrelazada al entrelazar la palabra código de LDPC con un criterio de grupo de bits; el tamaño del grupo de bits corresponde a un factor paralelo de la palabra código de LDPC; la segunda memoria proporciona la palabra código entrelazada a un modulador para mapeo de 64 símbolos.

公开(公告)号：MX2015001932A

公开(公告)日：2015-10-26

申请号：MX2015001932

申请日：2015-02-12

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SUNG-IK ,  KIM HEUNG-MOOK ,  KWON SUN-HYOUNG ,  HUR NAM-HO ,  LEE JAE-YOUNG

IPC: H04N19/89

Abstract: Se divulgan un modulador y un método de modulación que usan una constelación de señal de 16 símbolos no uniforme; el modulador incluye una memoria y un procesador; la memoria recibe una palabra código que corresponde con un código de verificación de paridad de baja densidad (LDPC) que tiene una tasa de código de 2/15; el procesador mapea la palabra código a 16 símbolos de la constelación de señal de 16 símbolos no uniforme sobre una base de 4 bits.

公开(公告)号：CA2881523A1

公开(公告)日：2015-08-13

申请号：CA2881523

申请日：2015-02-11

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SUNG-IK ,  KWON SUN-HYOUNG ,  LEE JAE-YOUNG ,  KIM HEUNG-MOOK ,  HUR NAM-HO

IPC: H03M13/11 ,  H03M13/27 ,  H03M13/31 ,  H04L1/24 ,  H04L27/34

Abstract: A modulator and a modulation method using a non-uniform 16-symbol signal constellation are disclosed. The modulator includes a memory and a processor. The memory receives a codeword corresponding to a low-density parity check (LDPC) code having a code rate of 7/15. The processor maps the codeword to 16 symbols of the non-uniform 16-symbol signal constellation on a 4-bit basis.