公开(公告)号：CA2892171A1

公开(公告)日：2015-11-22

申请号：CA2892171

申请日：2015-05-21

Applicant: KOREA ELECTRONICS TELECOMM

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

IPC: H03M13/11 ,  H03M13/27 ,  H04L1/00 ,  H04L27/34

Abstract: A bit interleaver, a bit-interleaved coded modulation (BICM) device and a bit interleaving method are disclosed herein. The bit interleaver includes a first memory, a processor, and a second memory. The first memory stores a low-density parity check (LDPC) codeword having a length of 16200 and a code rate of 10/15. The processor generates an interleaved codeword by interleaving the LDPC codeword on a bit group basis. The size of the bit group corresponds to a parallel factor of the LDPC codeword. The second memory provides the interleaved codeword to a modulator for 256-symbol mapping.

公开(公告)号：MX2015001342A

公开(公告)日：2015-07-28

申请号：MX2015001342

申请日：2015-01-28

Applicant: KOREA ELECTRONICS TELECOMM

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

IPC: H04N19/89

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 64800 y un índice de código de 7/15; 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 modulación de manipulación por desplazamiento de fase en cuadratura (QPSK).

公开(公告)号：CA2864634A1

公开(公告)日：2015-04-07

申请号：CA2864634

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 7/15. 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：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.

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：CA2687675A1

公开(公告)日：2010-06-08

申请号：CA2687675

申请日：2009-12-07

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LIM HYOUNGSOO ,  KIM HEUNG-MOOK ,  LEE SOO-IN

IPC: H04W48/10 ,  H04H20/71 ,  H04H60/02 ,  H04H60/90 ,  H04W24/08 ,  H04W36/30

Abstract: An apparatus for transmitting a signal for handoff in a transmitter of a broadcasting network where a plurality of center frequencies exist includes: a baseband broadcasting signal generation unit configured to generate a baseband broadcasting signal from broadcasting data to be transmitted; a transmitter identification signal sequence generation unit configured to generate a transmitter identification signal of the transmitter; a first transmission unit configured to combine the baseband broadcasting signal and the transmitter identification signal, and up-convert the combined signal to a center frequency of the transmitter; and a second transmission unit configured to modulate the transmitter identification signal, and up-convert the modulated transmitter identification signal to center frequencies of adjacent transmitters.

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：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.