公开(公告)号：US20150244550A1

公开(公告)日：2015-08-27

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: H04L27/14 ,  H04L25/06

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：US20150163013A1

公开(公告)日：2015-06-11

申请号：US14251300

申请日：2014-04-11

Applicant: Electronics and Telecommunications Research Institute ,  R&DB foundation, Korea Maritime and Ocean University

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

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.

Abstract translation: 公开了一种通过发送装置在频率共享的地面广播系统中发送广播信号的方法。 该方法包括基于根据广播服务定义的组标识（ID）生成包括在物理层帧中排列的导频信号的广播信号，并将所生成的广播信号发送到接收装置，其中布置的导频信号的位置 物理层帧由组ID不同。

公开(公告)号：US20130343392A1

公开(公告)日：2013-12-26

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: H04L12/741

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：US20150358195A1

公开(公告)日：2015-12-10

申请号：US14734928

申请日：2015-06-09

Applicant: Electronics and Telecommunications Research Institute

Inventor： Young Min KIM ,  Heung Mook KIM ,  Jae Hyun SEO

IPC: H04L27/34 ,  H04L1/00

CPC classification number: H04L27/3405 ,  H04L1/0071 ,  H04L1/0086

Abstract: The present invention discloses a digital modulation method for providing multiple services. The method for providing multiple services comprises multiplexing bits by allocating them according to a required SNR (Signal to Noise Ratio) of each service; and modulating multiplexed bits by applying non-uniform distances among constellation symbols.

Abstract translation: 本发明公开了一种用于提供多种服务的数字调制方法。 提供多种服务的方法包括：通过根据每个服务的所需SNR（信噪比）分配比特来复用比特; 以及通过在星座符号之间施加不均匀的距离来调制多路复用位。

公开(公告)号：US20150312645A1

公开(公告)日：2015-10-29

申请号：US14677930

申请日：2015-04-02

Applicant: Electronics and Telecommunications Research Institute

Inventor： You Seok LEE ,  Kwanwoong RYU ,  Heung Mook KIM ,  Jin Hyuk SONG ,  Jae Hyun SEO ,  Ho Min EUM

IPC: H04N21/81 ,  H04N21/43 ,  H04N21/438 ,  H04N21/2383 ,  H04N21/242

CPC classification number: H04N21/814 ,  H04H20/59 ,  H04N21/2383 ,  H04N21/242 ,  H04N21/4302 ,  H04N21/4382

Abstract: When a disaster occurs, a disaster information transmitting apparatus generates disaster information, spreads the disaster information with a spreading code, modulates the spread disaster information, and transmits the modulated disaster information using a guard band of a broadcasting frequency band.

Abstract translation: 发生灾害时，灾害信息发送装置生成灾害信息，利用扩展码扩散灾害信息，调制扩散灾害信息，并使用广播频带的保护频带发送调制灾难信息。

公开(公告)号：US20150295737A1

公开(公告)日：2015-10-15

申请号：US14642076

申请日：2015-03-09

Applicant: Electronics and Telecommunications Research Institute

Inventor： Young Min KIM ,  Jae Hyun SEO ,  Heung Mook KIM

IPC: H04L25/03 ,  H04L1/00 ,  H04B7/04

CPC classification number: H04L25/03318 ,  H04B7/0413 ,  H04B7/0854 ,  H04L1/0042 ,  H04L1/0048 ,  H04L1/206 ,  H04L25/067

Abstract: A soft decision detecting device in a multiple-input multiple-output (MIMO) receiving apparatus detects reception symbols from signals received through a plurality of reception antennas, calculates a variance of interference and noise of the detected reception symbols, and soft-decision-demaps the detected reception symbols by using the variance of interference and noise of the detected reception symbols to thus calculate a soft decision value.

Abstract translation: 多输入多输出（MIMO）接收装置中的软决策检测装置从通过多个接收天线接收的信号检测接收符号，计算检测到的接收符号的干扰和噪声的方差，以及软判决解映射 通过使用所检测的接收符号的干扰和噪声的方差来检测接收符号，从而计算软判决值。