公开(公告)号：US20230155634A1

公开(公告)日：2023-05-18

申请号：US17859969

申请日：2022-07-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Bo-Mi LIM ,  Hoi-Yoon JUNG ,  Sung-Ik PARK ,  Hae-Chan KWON ,  Sung-Jun AHN ,  Nam-Ho HUR ,  Hyun-Jeong YIM

IPC: H04B7/0413 ,  H04W4/06 ,  H04L1/00

CPC classification number: H04B7/0413 ,  H04W4/06 ,  H04L1/0071

Abstract: Disclosed herein are a method for transmitting a broadcast signal for signaling information about a combination of Layered-Division Multiplexing (LDM) technology and Multiple-Input Multiple-Output (MIMO) technology and an apparatus using the method. The method includes generating first signaling information indicating whether MIMO technology is applied to an enhanced layer by LDM technology, generating second signaling information indicating an MIMO application method when the MIMO technology is applied to the enhanced layer, and generating a broadcast signal using the first signaling information and the second signaling information.

公开(公告)号：US20230283323A1

公开(公告)日：2023-09-07

申请号：US18177623

申请日：2023-03-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Bo-Mi LIM ,  Sung-Ik PARK ,  Sung-Jun AHN ,  Hoi-Yoon JUNG ,  Hae-Chan KWON ,  Nam-Ho HUR

IPC: H04B7/0413 ,  H04B7/08

CPC classification number: H04B7/0413 ,  H04B7/0811

Abstract: Disclosed herein are a broadcast signal transmission method for signaling a transmission structure based on a combination of LDM technology and MIMO technology and an apparatus using the same. The broadcast signal transmission method may include generating first signaling information, indicating a transmission structure based on a combination of Multiple-Input Multiple-Output (MIMO) technology and Layered Division Multiplexing (LDM) technology, for a first subframe of a current broadcast signal frame, generating second signaling information, indicating a transmission structure based on a combination of the MIMO technology and the LDM technology, for a current subframe subsequent to the first subframe, and generating a broadcast signal using the first signaling information and the second signaling information.

公开(公告)号：US20190013972A1

公开(公告)日：2019-01-10

申请号：US15902909

申请日：2018-02-22

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Myung-Sun BAEK ,  Joung-Il YUN ,  Sang-Woon KWAK ,  Hae-Chan KWON ,  Young-Su KIM ,  Hyoung-Soo LIM ,  Nam-Ho HUR

IPC: H04L25/03 ,  H04L1/06 ,  H04B1/7097 ,  H04W28/02 ,  H04W72/08

Abstract: Disclosed herein are an apparatus and method for providing FTN communication using transmit diversity. A transmission apparatus generates a signal to be output through diversity modulation. A diversity order of diversity modulation may be set based on an FTN parameter, such as a variable for adjusting sampling time or a symbol transmission speed. When the diversity order is set based on the FTN parameter, the FTN parameter and the diversity order may be set so as to satisfy a QoS required of the transmission apparatus, such as a transmission rate and a Bit Error Rate. Depending on the circumstances, the set FTN parameter and diversity order may be provided to a reception apparatus that is to receive the output signal.

公开(公告)号：US20180205578A1

公开(公告)日：2018-07-19

申请号：US15659453

申请日：2017-07-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sang-Woon KWAK ,  Joung-Il YUN ,  Myung-Sun BAEK ,  Hae-Chan KWON ,  Young-Su KIM ,  Hyoung-Soo LIM ,  Nam-Ho HUR

IPC: H04L25/02 ,  H04L1/00 ,  H04L25/03

CPC classification number: H04L25/0228 ,  H04L1/0047 ,  H04L1/005 ,  H04L1/0052 ,  H04L1/0054 ,  H04L25/03853

Abstract: Disclosed herein are a method and apparatus for iterative interference cancellation and channel estimation in a system based on FTN communication including a pilot. Interference of a pilot symbol on a data symbol is estimated, and the estimated interference is eliminated from a sequence of data symbols. When demodulation and channel decoding are performed on the sequence of data symbols, interference between data symbols and interference of a data symbol on a pilot symbol are estimated. Such estimation is repeatedly performed, and as FTN interference is repeatedly estimated and eliminated, channel estimation performance is improved, and through the improved channel estimation performance, the reception performance of the entire system is improved.

公开(公告)号：US20230146118A1

公开(公告)日：2023-05-11

申请号：US18049530

申请日：2022-10-25

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hoi-Yoon JUNG ,  Bo-Mi LIM ,  Sung-Ik PARK ,  Hae-Chan KWON ,  Sung-Jun AHN ,  Nam-Ho HUR

IPC: H04B7/0456 ,  H04L1/00 ,  H03M13/25

CPC classification number: H04B7/0456 ,  H04L1/0071 ,  H03M13/255

Abstract: Disclosed herein are a broadcast signal transmission/reception method using multiple antennas and layered-division multiplexing and an apparatus for the same. A broadcast signal transmission apparatus includes a Multiple-Input Multiple-Output (MIMO) Bit-Interleaved Coded Modulation (BICM) unit for dividing enhanced layer data into two enhanced layer signals having different polarizations, a combination unit for generating a multiplexed signal corresponding to a first transmitting antenna by combining a core layer signal corresponding to core layer data with a first enhanced layer signal, and transmission signal generation units for generating a first transmission signal, corresponding to the multiplexed signal and transmitted through the first transmitting antenna, and a second transmission signal, corresponding to a second enhanced layer signal and transmitted through a second transmitting antenna.

公开(公告)号：US20180034591A1

公开(公告)日：2018-02-01

申请号：US15421295

申请日：2017-01-31

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joung-Il YUN ,  Sang-Woon KWAK ,  Myung-Sun BAEK ,  Hae-Chan KWON ,  Hyoung-Soo LIM ,  Nam-Ho HUR ,  Nam-Shik KIM ,  Bi-Woong CHUNG

IPC: H04L1/00 ,  H04L27/01

CPC classification number: H04L27/01 ,  H04B1/71072 ,  H04L1/005 ,  H04L1/0054 ,  H04L25/03006 ,  H04L25/03834 ,  H04L25/068

Abstract: Disclosed herein are an apparatus and method for receiving a signal based on FTN. The apparatus for receiving a signal based on FTN includes an equalizer for creating a Log Likelihood Ratio (LLR) sequence by equalizing an FTN signal sequence sampled at an FTN signaling rate; a deinterleaver for deinterleaving the created LLR sequence; a decoder for decoding the LLR sequence by correcting errors in the deinterleaved LLR sequence; an interleaver for interleaving the decoded LLR sequence and providing the interleaved LLR sequence to the equalizer; and an FTN interference estimation unit for providing the FTN signal sequence, from which an FTN interference sequence is eliminated, to the equalizer, using the interleaved LLR sequence.