公开(公告)号：WO2009075468A3

公开(公告)日：2010-07-22

申请号：PCT/KR2008005979

申请日：2008-10-10

Applicant: KOREA ELECTRONICS TELECOMM ,  EUM HO MIN ,  LIM HYOUNG SOO ,  LEE YONG TAE ,  KIM HEUNG MOOK ,  LIM JONG SOO

Inventor： EUM HO MIN ,  LIM HYOUNG SOO ,  LEE YONG TAE ,  KIM HEUNG MOOK ,  LIM JONG SOO

IPC: H04B7/14

CPC classification number: H04B7/155 ,  H04W56/0035

Abstract: A repeater converts a frequency of a received signal based on a local oscillating frequency and transmits a transmitting signal of a frequency that is different from the frequency of the received signal. Here, the local oscillating frequency includes a local oscillating error that may be different in a plurality of repeaters. Accordingly, the repeater cancels the local oscillating frequency error itself in a frequency conversion so that transmitting frequencies between the plurality of repeaters may be identical.

Abstract translation: 中继器基于本地振荡频率转换接收信号的频率，并且发送与接收信号的频率不同的频率的发送信号。 这里，本地振荡频率包括在多个中继器中可能不同的本地振荡误差。 因此，中继器在频率转换中抵消本地振荡频率误差本身，使得多个转发器之间的发送频率可以相同。

公开(公告)号：CA2708745C

公开(公告)日：2014-09-30

申请号：CA2708745

申请日：2008-10-10

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： EUM HO MIN ,  LIM HYOUNG SOO ,  LEE YONG TAE ,  KIM HEUNG MOOK ,  LIM JONG SOO

IPC: H04B7/14

Abstract: A repeater converts a frequency of a received signal based on a local oscillating frequency and transmits a transmitting signal of a frequency that is different from the frequency of the received signal. Here, the local oscillating frequency includes a local oscillating error that may be different in a plurality of repeaters. Accordingly, the repeater cancels the local oscillating frequency error itself in a frequency conversion so that transmitting frequencies between the plurality of repeaters may be identical.

公开(公告)号：CA2708745A1

公开(公告)日：2009-06-18

申请号：CA2708745

申请日：2008-10-10

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： EUM HO MIN ,  LIM HYOUNG SOO ,  LEE YONG TAE ,  KIM HEUNG MOOK ,  LIM JONG SOO

IPC: H04B7/14

Abstract: A repeater converts a frequency of a received signal based on a local oscillating frequency and transmits a transmitting signal of a frequency that is different from the frequency of the received signal. Here, the local oscillating frequency includes a local oscillating error that may be different in a plurality of repeaters. Accordingly, the repeater cancels the local oscillating frequency error itself in a frequency conversion so that transmitting frequencies between the plurality of repeaters may be identical.

公开(公告)号：EP2232728A4

公开(公告)日：2014-02-12

申请号：EP08859117

申请日：2008-10-10

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： EUM HO MIN ,  LIM HYOUNG SOO ,  LEE YONG TAE ,  KIM HEUNG MOOK ,  LIM JONG SOO

IPC: H04B7/155 ,  H04W56/00

CPC classification number: H04B7/155 ,  H04W56/0035

公开(公告)号：EP2213035A4

公开(公告)日：2015-01-07

申请号：EP08852904

申请日：2008-09-26

Applicant: KOREA ELECTRONICS TELECOMM

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

IPC: H04B7/15

CPC classification number: H04B7/15528

Abstract: A repeater having different input and output frequencies converts a signal received with the input frequency to a first intermediate frequency signal based on a local oscillating frequency for intermediate frequency conversion, and converts the first intermediate frequency signal to a second intermediate frequency signal by performing digital processing on the first intermediate frequency signal. Then, the repeater generates a first frequency tone signal that corresponds to a difference between the input and output frequencies, and generates a second frequency tone signal from the local oscillating frequency for intermediate frequency conversion and the first frequency tone signal. The repeater up-converts the second intermediate frequency signal to the output frequency based on the second frequency tone signal, and transmits the signal.

公开(公告)号：KR20090043098A

公开(公告)日：2009-05-06

申请号：KR20070108753

申请日：2007-10-29

Applicant: KOREA ELECTRONICS TELECOMM ,  KOREAN BROADCASTING SYSTEM

Inventor： BAE BYUNG JUN ,  LEE YONG TAE ,  KIM GEON ,  PARK SO RA ,  EUM HO MIN ,  PARK SUNG IK ,  LEE JAE YOUNG ,  SEO JAE HYUN ,  KIM HEUNG MOOK ,  LIM JONG SOO ,  LEE SOO IN ,  KWON TAE HOON ,  MOK HA GYUN

IPC: H04N17/04

CPC classification number: H04N17/04 ,  H04B1/1027 ,  H04H20/26 ,  H04H2201/11 ,  H04N5/44513

Abstract: 본 발명은, DMB 전송신호 품질 측정 장치 및 그 방법과, 그를 이용한 DMB 방송 수신 시스템에 관한 것으로서, 방송망을 통하여 수신된 DMB 전송신호로부터 에러 보정 전에 직교변조 신호(예를 들면, I/Q 신호)를 생성하여 신호 품질을 측정함으로써, 신호 품질의 정확성을 높이고자 한다.
이를 위하여, 본 발명은, DMB 전송신호 품질 측정 장치에 있어서, DMB 전송신호를 수신하여 디지털 IF(Intermediate Frequency) 신호로 변환하기 위한 수신 처리 수단; 상기 디지털 IF 신호를 복조하여 직교변조 신호를 생성하기 위한 복조 수단; 및 상기 직교변조 신호를 이용하여 신호품질 측정값을 구하기 위한 신호품질 측정 수단을 포함한다.
DMB, 지상파 DMB, RF 신호 분석, 직교변조 신호, I/Q 신호, 신호품질 측정

Abstract translation: 本发明中，DMB传输的信号质量测量的装置和涉及一种方法和，DMB广播使用同一接收系统，（例如，I / Q信号）从DMB传输信号误差校正之前正交调制的信号经由广播网络接收到的 通过测量信号质量来提高信号质量的准确性。