公开(公告)号：US09369316B2

公开(公告)日：2016-06-14

申请号：US14618058

申请日：2015-02-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Young Min Kim ,  Jae Hyun Seo ,  Heung Mook Kim

IPC: H04L27/06 ,  H04L25/06 ,  H04L27/20 ,  H04L27/38

CPC classification number: H04L25/067 ,  H04L27/2032 ,  H04L27/38

Abstract: A digital demodulation system calculates an I channel value and a Q channel value of a received signal. The digital demodulation system then changes detection levels to obtain non-uniform detection levels. The digital demodulation system then demodulates the received signal bit by bit by using the changed detection levels and the I channel value and the Q channel value.

Abstract translation: 数字解调系统计算接收信号的I信道值和Q信道值。 然后，数字解调系统改变检测水平以获得不均匀的检测水平。 然后，数字解调系统通过使用改变的检测电平和I信道值和Q信道值逐位地解调接收信号。

公开(公告)号：US09246806B2

公开(公告)日：2016-01-26

申请号：US13966766

申请日：2013-08-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Hyun Seo ,  Hyoung Soo Lim ,  Heung Mook Kim ,  Yong Tae Lee ,  Sung Ik Park ,  Jong Soo Lim ,  Soo In Lee

IPC: H04L12/28 ,  H04L12/741 ,  H04H20/30

CPC classification number: H04L45/74 ,  H04H20/30

Abstract: In a digital broadcasting signal transmission system, a transmission frame includes a frame body and a frame header, and the frame body is divided into a plurality of sub-bands in the frequency domain and is divided into a plurality of symbols in the time domain. The frame header is provided in the former part of the transmission frame and is transmitted with a signal in the time domain. The frame body includes a plurality of services, and the services respectively receive at least one sub-band and at least one symbol. The frame header includes information on the plurality of services, and information on the plurality of services includes information on the sub-band and the symbol to which the services are allocated, information on channel encoding levels of the services, and information on digital modulation levels of the services.

Abstract translation: 在数字广播信号传输系统中，传输帧包括帧体和帧头，并且帧体被划分成频域中的多个子带，并且在时域中被划分为多个符号。 帧头在传输帧的前一部分中提供，并且在时域中以信号发送。 帧体包括多个服务，并且服务分别接收至少一个子带和至少一个符号。 帧头包括关于多个服务的信息，并且关于多个服务的信息包括关于子带和分配服务的符号的信息，关于服务的信道编码级别的信息以及关于数字调制级别的信息 的服务。

公开(公告)号：US09686042B2

公开(公告)日：2017-06-20

申请号：US14251300

申请日：2014-04-11

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung Ik Park ,  Sun Hyoung Kwon ,  Heung Mook Kim ,  Nam Ho Hur ,  Jeong Chang Kim ,  Jae Hyun Seo ,  Ho Min Eum

IPC: H04L1/00 ,  H04L27/26 ,  H04L5/00 ,  H04W16/14 ,  H04N21/61 ,  H04N21/438

CPC classification number: H04L1/0042 ,  H04L1/0075 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2692 ,  H04N21/4382 ,  H04N21/6112 ,  H04W16/14

Abstract: Disclosed is a method of transmitting, by a transmission device, broadcast signals in a frequency-shared terrestrial broadcast system. The method includes generating the broadcast signals including pilot signals arranged at a physical layer frame based on a group identification (ID) defined according to a broadcast service, and transmitting the generated broadcast signals to a reception device, wherein the positions of the pilot signals arranged at the physical layer frame are different by group IDs.

公开(公告)号：US08837553B2

公开(公告)日：2014-09-16

申请号：US13684485

申请日：2012-11-23

Applicant: Electronics and Telecommunications Research Institute ,  Korean Broadcasting System ,  Nextwill Co., Ltd.

Inventor： Sung Ik Park ,  Hyoungsoo Lim ,  Ho Min Eum ,  Jae Hyun Seo ,  Heung Mook Kim ,  Nam Ho Hur ,  Young Woo Suh ,  Jae Kwon Lee ,  Ha Kyun Mok ,  Won Gi Seo ,  Ju Byung Kim

IPC: H04B1/00 ,  H04N21/2383 ,  H04N21/81 ,  H04N21/438 ,  H04B1/707

CPC classification number: H04B1/707 ,  H04H20/30 ,  H04H60/07 ,  H04N21/2383 ,  H04N21/4382 ,  H04N21/8126

Abstract: Provided are an apparatus for addition data transmission includes: an IF broadcasting signal generating unit receiving the broadcast data, and FEC and modulation of the received broadcast data to generate a broadcasting signal in an intermediate frequency (IF) band; an IF addition signal generating unit receiving the addition data to generate an addition signal in the IF band by using direct sequence spread spectrum (DSSS); an average power controlling unit controlling average power of the addition signal in the IF band; a signal combining unit combining the broadcasting signal in the IF band and the addition signal in the IF band to generate a combination signal; an RF upward converting unit upwardly converting the combination signal in a signal in a radio frequency (RF) band to a combination signal in the RF band; and a transmitting unit transmitting the combination signal in the RF band.

Abstract translation: 提供了一种用于附加数据传输的装置，包括：IF广播信号产生单元，接收广播数据，以及FEC和调制所接收的广播数据以产生中频（IF）频带中的广播信号; IF附加信号发生单元，通过使用直接序列扩频（DSSS）接收加法数据以产生IF频带中的相加信号; 平均功率控制单元，控制IF频带中的相加信号的平均功率; 信号组合单元，组合IF频带中的广播信号和IF频带中的相加信号，以产生组合信号; 射频向上转换单元将射频（RF）频带中的信号中的组合信号向上转换为RF频带中的组合信号; 以及在RF频带中发送组合信号的发送单元。