公开(公告)号：US11722355B2

公开(公告)日：2023-08-08

申请号：US17220659

申请日：2021-04-01

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae-Hwui Bae ,  Young-Su Kim ,  Dong-Joon Choi ,  Nam-Ho Hur

IPC: H04L27/34 ,  H04L1/00 ,  H04J99/00

CPC classification number: H04L27/3488 ,  H04J99/00 ,  H04L1/0071

Abstract: Disclosed herein are an apparatus and method for transmitting and receiving a 4-layer layered-division multiplexing (LDM) signal. An apparatus for transmitting a 4-layer layered-division multiplexing signal includes a layered-division multiplexing modulation unit for generating a 3-layer layered-division multiplexing signal by performing layered-division multiplexing modulation on three layer signals and generating a 4-layer layered-division multiplexing signal by inserting a Pseudo-random Noise (PN) sequence into the 3-layer layered-division multiplexing signal, a pilot insertion unit for inserting a pilot into the 4-layer layered-division multiplexing signal, and a transmission unit for transmitting the 4-layer layered-division multiplexing signal.

公开(公告)号：US20210336837A1

公开(公告)日：2021-10-28

申请号：US17220659

申请日：2021-04-01

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae-Hwui Bae ,  Young-Su Kim ,  Dong-Joon Choi ,  Nam-Ho Hur

IPC: H04L27/34 ,  H04L1/00 ,  H04J99/00

Abstract: Disclosed herein are an apparatus and method for transmitting and receiving a 4-layer layered-division multiplexing (LDM) signal. An apparatus for transmitting a 4-layer layered-division multiplexing signal includes a layered-division multiplexing modulation unit for generating a 3-layer layered-division multiplexing signal by performing layered-division multiplexing modulation on three layer signals and generating a 4-layer layered-division multiplexing signal by inserting a Pseudo-random Noise (PN) sequence into the 3-layer layered-division multiplexing signal, a pilot insertion unit for inserting a pilot into the 4-layer layered-division multiplexing signal, and a transmission unit for transmitting the 4-layer layered-division multiplexing signal.

公开(公告)号：US10892924B2

公开(公告)日：2021-01-12

申请号：US16797845

申请日：2020-02-21

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jae-Hwui Bae ,  Sun-Hyoung Kwon ,  Young-Su Kim ,  Dong-Joon Choi ,  Nam-Ho Hur

IPC: H04W72/04 ,  H04L27/00 ,  H04J99/00

Abstract: Disclosed herein is a demodulation method of a Layer-Division Multiplexing (LDM) system. The demodulation method may include receiving an LDM modulation signal, restoring a first-layer signal from the LDM modulation signal and remodulating the first-layer signal, restoring and remodulating a second-layer signal by performing cancellation of the amplitude component of the first-layer signal from the LDM modulation signal using signaling information independently of restoration and remodulation of the first-layer signal, and restoring a third-layer signal using the first-layer signal, the second-layer signal, and the LDM modulation signal.