公开(公告)号：US20220131515A1

公开(公告)日：2022-04-28

申请号：US17179408

申请日：2021-02-19

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Kil Soo JEONG ,  Jeong Seop KIM ,  Ju Hang SOHN ,  Dong Hyeok LEE ,  Chang Gyun KIM ,  Soung Hwan CHI ,  Heejae JUN ,  Yong Woo PARK

IPC: H03H7/01 ,  H02G3/22

Abstract: A current filter externally coupled to a cable includes a coupling portion coupled to a cable portion to surround the cable portion including at least one cable, the coupling portion including a flexible metal, and a ground portion detachably attached to the coupling portion and transmitting a current flowing through the coupling portion to a ground plane.

公开(公告)号：US20210403441A1

公开(公告)日：2021-12-30

申请号：US16975084

申请日：2020-01-10

Applicant: Agency for Defense Development

Inventor： Kuk Tae Kwon ,  Seung Hee Kim ,  Woong Hee Lee ,  Jeong Sub Shim

IPC: C07D257/04 ,  C06B25/34

Abstract: The present invention relates to functional group-protected diazidoglyoxime (DAG), a method of synthesizing the same, and a method of synthesizing TKX-50 using functional group-protected DAG. Insensitive-DAG with enhanced insensitivity, instead of sensitive DAG, may be synthesized to reduce risks of processes and harmfulness arising from threats of explosion and fire accidents caused by impact, friction and static electricity, and thus it is possible to stably synthesize functional group-protected DAG.

公开(公告)号：US11146292B2

公开(公告)日：2021-10-12

申请号：US16722294

申请日：2019-12-20

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Cheolsun Park ,  Chiho Lee ,  Unseob Jeong ,  Dongyeong Kim ,  Junghwan Song ,  Dongweon Yoon

IPC: H03M13/15 ,  H03M13/29 ,  H03M13/11

Abstract: A data decoder includes a communication unit receiving a bit signal with encoded data; a first operation unit that bit shifts the bit signal by a first length, corresponding to a length of a spreading code used to encode the data, to generate a first operation stream; a second operation unit generating a second operation stream without the spreading code; a third operation unit that bit shifts the second operation stream by a second length to generate a third operation stream; a fourth operation unit generating a fourth operation stream from which the data is removed using the second operation stream and the third operation stream; and a polynomial generator that decodes the encoded data using the fourth operation stream.

公开(公告)号：US20210286903A1

公开(公告)日：2021-09-16

申请号：US17202905

申请日：2021-03-16

Applicant: AGENCY FOR DEFENSE DEVELOPMENT ,  Korea University Research and Business Foundation

Inventor： Bohun KIM ,  Jongsun PARK ,  Donghwa KIM ,  Myungkil AHN

IPC: G06F21/72 ,  H03K19/21 ,  H03K3/037 ,  H04L9/06 ,  H04L9/00

Abstract: This application relates to a synchronization circuit for synchronizing signals used in a threshold implementation operation process performing in an S-box of an encryption circuit. In one aspect, the synchronization circuit includes an enable signal generator configured to generate an enable signal. The synchronization circuit may also include a synchronization unit included in an encryption circuit and located inside an S-box that performs a threshold implementation operation that calculates by dividing bits of an input signal into bits equal to or greater than the number of bits of the input signal. The synchronization unit may be configured to synchronize signals used in a threshold implementation operation process based on the generated enable signal.

公开(公告)号：US11108491B2

公开(公告)日：2021-08-31

申请号：US16964956

申请日：2018-10-12

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Woocheol Kim ,  Jaehyoung Park

IPC: H04K3/00 ,  H04W74/08 ,  H04L5/00

Abstract: According to one embodiment of the present invention, in a concealed jamming attack using a false acknowledgement frame, a jamming attack is performed at a point in time during which a data frame is transmitted between a transmission node and a reception node and a false acknowledgement frame is transmitted to the data frame transmission node, such that the data frame transmission node cannot detect a data transmission failure in a MAC layer because of the jamming attack, and thus a jamming attack can be concealed.

公开(公告)号：US20210250017A1

公开(公告)日：2021-08-12

申请号：US17171757

申请日：2021-02-09

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Yeonsoo JANG ,  Jintae PARK ,  Beomjun PARK ,  Insun KIM ,  Ghiback KIM

IPC: H03H17/02

Abstract: This application relates to a signal filtering device. The device includes a memory and a processor. The processor may generate one or more matrices based on a size of a digital filter bank that generates an output signal by dividing an input signal into a plurality of channels and store in the memory each of the generated one or more matrices to which a plurality of digital filter bank coefficients or a plurality of input signals are assigned. The processor may also partially calculate the stored plurality of digital filter bank coefficients and the plurality of signals based on a number of at least some of the plurality of channels, and calculate the calculated digital filter bank coefficients and signals. The processor may further perform a discrete Fourier transform (DFT) on the calculated signal and compensate for a phase of the discrete Fourier transformed signal according to a preset reference.

公开(公告)号：US20210126239A1

公开(公告)日：2021-04-29

申请号：US17053011

申请日：2019-10-14

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Yu Song CHOI ,  Tae Young AHN ,  Jang Hyeon CHO

IPC: H01M4/12 ,  H01M6/36 ,  H01M4/10

Abstract: A lithium anode of a thermal battery may include a metal alloy foam in which a plurality of pores is formed and including nickel (Ni), iron (Fe), chromium (Cr), and aluminum (Al) mixed in a predetermined composition ratio, and lithium impregnated into the metal alloy foam in a molten state and accommodated in the pores, wherein the chromium in the composition ratio may facilitate the impregnation of the lithium into the pores and reduce the reactivity of the metal alloy foam to the lithium at an operating temperature of the thermal battery, and the aluminum in the composition ratio may facilitate the impregnation of the lithium into the pores and prevent the lithium from penetrating into a surface of the metal alloy foam.

公开(公告)号：US20210103311A1

公开(公告)日：2021-04-08

申请号：US17064866

申请日：2020-10-07

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Jong Pyo HAN ,  Seo Hee YANG ,  Jae Ho PARK

IPC: G06F1/10 ,  G06F7/46

Abstract: This application relates to a method and apparatus for outputting signals. In one aspect, the apparatus includes a signal control unit configured to generate two or more control signals upon two or more conditions, which respectively correspond to the two or more control signals being satisfied. The apparatus also includes a signal output unit configured to output a final output signal depending on the two or more control signals upon an input signal being inputted into the signal output unit.

公开(公告)号：US20210063582A1

公开(公告)日：2021-03-04

申请号：US17001684

申请日：2020-08-25

Applicant: AGENCY FOR DEFENSE DEVELOPMENT ,  AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Jae Sung LIM ,  Ho Ki BAEK ,  Jin Seok LEE ,  Kyung Woo KIM ,  Jae Hyun HAM

IPC: G01S19/29 ,  G01S19/25

Abstract: Provided is a method and apparatus for selecting an airborne position reference node. A weight center coordinate of the repeaters is calculated by using position coordinates of repeaters, a plane having a vector connecting the weight center coordinate and a position coordinate of a user as a normal vector is determined, and the position coordinates of the repeaters are orthographically projected onto the plane. A certain number of repeaters located farthest from the weight center coordinate of the repeaters are selected to be airborne position reference nodes, on the basis of the orthographically projected coordinates of the repeaters and the weight center coordinate.

公开(公告)号：US20210013897A1

公开(公告)日：2021-01-14

申请号：US16925908

申请日：2020-07-10

Applicant: AGENCY FOR DEFENSE DEVELOPMENT

Inventor： Sang Won KIM ,  Dong Keun LEE ,  Jeung Min JOO ,  Jung Hoon KIM ,  Sung Jin JO ,  Un Seob JEONG

IPC: H03M1/10 ,  G01R23/14 ,  H03M1/60 ,  H03M1/12

Abstract: Provided are an apparatus and a method for measuring a frequency of a broadband signal by using low-speed ADCs having sub-Nyquist sampling rates. A plurality of channels each including a low-speed ADC having a sub-Nyquist sampling rate (e.g. sampling frequency from several MHz to hundreds of MHz) are provided, and the frequency of an input signal corresponding to a combination of frequencies calculated through the respective channels is estimated. Therefore, as the number of channels increases, the range of measurable frequencies may be extended.