公开(公告)号：US20180102808A1

公开(公告)日：2018-04-12

申请号：US15656906

申请日：2017-07-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Hwui BAE ,  Sang-Jung RA ,  Jin Hyuk SONG ,  Joon Young JUNG ,  Dong Joon CHOI ,  Namho HUR

IPC: H04B3/46 ,  H04B3/23 ,  H04B1/06 ,  H04L29/08 ,  H04L5/00 ,  H04B17/21 ,  H04L7/00

CPC classification number: H04B3/46 ,  H04B1/06 ,  H04B3/232 ,  H04B17/21 ,  H04L5/001 ,  H04L7/0079 ,  H04L27/26 ,  H04L69/323

Abstract: A method of estimating an integer frequency offset and compensating for the integer frequency offset by an estimated error is provided. A frequency offset estimation method may include receiving a reception signal including PLC data and a physical layer link channel (PLC) preamble, detecting first position information on a position of a subcarrier of the PLC preamble in a frequency axis from the reception signal through a cross-correlation between the PLC preamble and the reception signal, detecting second position information on the position of the subcarrier of the PLC preamble defined in a transmission end by restoring the PLC data, and calculating a frequency offset by comparing the first position information with the second position information.

公开(公告)号：US20150139339A1

公开(公告)日：2015-05-21

申请号：US14308779

申请日：2014-06-19

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sang-Jung RA ,  Joon Young JUNG ,  Jae-Ho LEE ,  Dong Joon CHOI ,  Namho HUR

IPC: H04N19/85 ,  H04N19/89

CPC classification number: H04N21/2368

Abstract: A broadcasting transmitting apparatus splits a piece of broadcast content into an audio signal and a video signal, encodes the audio signal to generate an audio bit string, encodes the video signal to generate a video bit string, multiplexes the audio bit string and the video bit string, and modulates the multiplexed bit strings into a symbol. The encoded audio bit string is allocated to some bits of the symbol, and the encoded audio bit string is allocated to the remaining bits of the symbol.

Abstract translation: 广播发送装置将广播内容分割为音频信号和视频信号，对音频信号进行编码，生成音频比特串，对视频信号进行编码，生成视频比特串，复用音频比特串和视频比特 字符串，并将多路复用位串调制成符号。 将经编码的音频比特串分配给符号的某些比特，并将经编码的音频比特串分配给符号的其余比特。

公开(公告)号：US20200322121A1

公开(公告)日：2020-10-08

申请号：US16839916

申请日：2020-04-03

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Myung-Sun BAEK ,  Sang-Jung RA ,  Byungjun BAE ,  Yong Seong CHO ,  Hyoung Kyu SONG ,  Won-Seok LEE

IPC: H04L7/00

Abstract: A method and an apparatus for estimating synchronization of a broadcast signal in a time domain using a synchronization estimation signal through steps of: performing a correlation operation using a correlation window on a plurality of synchronization estimation signals separated to a plurality of paths and outputting a plurality of correlated signals; delaying the plurality of correlated signals to output a plurality of delayed signals; and estimating the synchronization using the plurality of delayed signals are provided.

公开(公告)号：US20150156045A1

公开(公告)日：2015-06-04

申请号：US14308997

申请日：2014-06-19

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jae-Ho LEE ,  Sang-Jung RA ,  Dong Joon CHOI ,  Namho HUR

IPC: H04L27/26

CPC classification number: H04L27/2613 ,  H04L27/2607 ,  H04L27/2627 ,  H04L27/2646

Abstract: In an orthogonal frequency division multiplexing (OFDM) wireless communication system, when path delay information is received from a reception apparatus through a return path after data transmission, a length of a cyclic prefix included in a transmitted signal is adjusted on the basis of a delay value included in the path delay information.

Abstract translation: 在正交频分复用（OFDM）无线通信系统中，当在数据发送之后通过返回路径从接收装置接收到路径延迟信息时，根据延迟来调整包含在发送信号中的循环前缀的长度 值包含在路径延迟信息中。