公开(公告)号：US20220268920A1

公开(公告)日：2022-08-25

申请号：US17445661

申请日：2021-08-23

Applicant: AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Jae Hyun KIM ,  Kyeongrok KIM

IPC: G01S13/90

Abstract: Disclosed are a method and apparatus for processing source data of a synthetic aperture radar in a satellite, including receiving source data generated based on a signal returned after an electronic device steers a beam from a synthetic aperture radar and backscatters, setting a plurality of subswaths after the electronic device parses the source data, storing based on the plurality of subswaths after the electronic device decodes the source data; and generating image data after the electronic device calls the decoded source data in the order of the plurality of sub swaths.

公开(公告)号：US20210302568A1

公开(公告)日：2021-09-30

申请号：US17148689

申请日：2021-01-14

Applicant: AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Jae Hyun KIM ,  Kyeongrok Kim

IPC: G01S13/90 ,  G01S7/35

Abstract: The present invention provides an apparatus for compensating a phase error of an RF band chirp signal by pre-distorting a base band chirp signal, including: a waveform generator to output the base band chirp signal; an RF modulator to output the RF band chirp signal by upconverting the base band chirp signal; an error calculation unit to calculate a phase error over time for a predetermined time by comparing the RF band chirp signal with an ideal chirp signal; a section division unit to divide the predetermined time into a plurality of time sections; a section combination unit to combine neighboring time sections based on the phase error; and a phase distortion unit to distort phase of the base band chirp signal in the combined time sections based on the phase error.

公开(公告)号：US20240187287A1

公开(公告)日：2024-06-06

申请号：US18527898

申请日：2023-12-04

Applicant: AGENCY FOR DEFENSE DEVELOPMENT ,  Hanbat National University Industry-Academic Cooperation Foundation ,  AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Jae Seang LEE ,  Sung Min LEE ,  Joo Hang SON ,  Soo Il KIM ,  Eui Rim JEONG ,  Kyung Woo KIM ,  Jae Hyun KIM

IPC: H04L25/03 ,  H04L27/26

CPC classification number: H04L25/03159 ,  H04L27/2607

Abstract: A transmission apparatus of a single carrier-based wireless communication system is proposed. The transmission apparatus may include a transceiver, a memory configured to store one or more instructions; and a processor configured to execute the one or more instructions stored in the memory. The processor may generate data symbols by modulating traffic data, generate a cyclic prefix (CP) on the basis of the data symbols, and generate a pilot symbol for the data symbol. The transceiver may transmit a single carrier frequency domain equalizer (SC-FDE) frame including the data symbol, the CP, and the pilot symbol. The data symbols may include first data symbols and second data symbols. The pilot symbol may be transmitted after transmission of the first data symbols and before transmission of the second data symbols.