公开(公告)号：US11817977B2

公开(公告)日：2023-11-14

申请号：US17710625

申请日：2022-03-31

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Byung Chan Kim ,  Kang Hee Kim ,  Haeng Sook Ro ,  Gwang Moon Park ,  Soo Ho Sohn ,  Ki Cheol Tae

IPC: H04B3/46 ,  H04L27/00

CPC classification number: H04L27/0012 ,  H04L27/0006

Abstract: In the present invention, in classifying modulation types of a plurality of modulation signals by using a classifier (an artificial neural network model based on machine learning), the classifier may classify the modulation types of the modulation signals by using pieces of I/Q data, sampled with one sampling frequency, as input data, and thus, may quickly classify the modulation signals.

公开(公告)号：US10044112B2

公开(公告)日：2018-08-07

申请号：US15209951

申请日：2016-07-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Gwang Moon Park ,  Haeng Sook Ro ,  Sang In Cho ,  Yong Seok Choi

IPC: H01Q21/00 ,  H01Q21/24 ,  H01Q1/24 ,  H01Q9/14 ,  H01Q9/16 ,  H01Q21/20 ,  H01Q21/30

Abstract: Disclosed are a variable antenna and an apparatus for detecting a radio signal. The variable antenna includes: a first receiving unit including at least one liquid metal antenna element; a second receiving unit including at least one liquid metal antenna element having a length different from a length of the first receiving unit; and a gain control unit configured to electrically adjust lengths of the liquid metal antenna elements for one of the first receiving unit and the second receiving unit according to the frequency of a received signal, wherein each antenna array realized by the liquid metal antenna elements of the first receiving unit and the second receiving unit is arranged in a single bay.

公开(公告)号：US12231210B2

公开(公告)日：2025-02-18

申请号：US18319125

申请日：2023-05-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Gwang Moon Park

IPC: H04B7/08 ,  H04B17/20 ,  H04B17/23

Abstract: A weak signal detection device for detecting a weak signal appearing intermittently with a level that is less than or equal to internal noise of a radio frequency (RF) receiving part may comprise: a cross-correlation spectrum processing part configured to generate a cross-correlation spectrum using a correlation between RF receiving channels; and a waveform combiner configured to generate an output spectrum having a spectrum persistent function by assigning weight values to a current waveform and a previous waveform of the cross-correlation spectrum.