公开(公告)号：US20240333574A1

公开(公告)日：2024-10-03

申请号：US18444130

申请日：2024-02-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kwanwoong RYU ,  Chung Sup Kim ,  Hyuk Je Kim ,  Sung Woong Choi ,  Kwonhue Choi ,  Hyung-seop Son

IPC: H04L27/26

CPC classification number: H04L27/265 ,  H04L27/2607 ,  H04L27/2628

Abstract: Provided are a signal transmission method and signal reception method of heterogeneous systems sharing a frequency band. The signal transmission method performed by a transmitter of a target communication system sharing a frequency band of a general communication system in an underlay form includes mapping information symbols to be transmitted to a delay-Doppler (DD) domain and determining an information symbol mapping matrix, applying an inverse symplectic finite Fourier transform (ISFFT) to the information symbol mapping matrix and transforming the information symbol mapping matrix into a frequency-time (FT) matrix, and applying a Heisenberg transform to the FT matrix and generating a transmission signal of a time domain.

公开(公告)号：US20150312645A1

公开(公告)日：2015-10-29

申请号：US14677930

申请日：2015-04-02

Applicant: Electronics and Telecommunications Research Institute

Inventor： You Seok LEE ,  Kwanwoong RYU ,  Heung Mook KIM ,  Jin Hyuk SONG ,  Jae Hyun SEO ,  Ho Min EUM

IPC: H04N21/81 ,  H04N21/43 ,  H04N21/438 ,  H04N21/2383 ,  H04N21/242

CPC classification number: H04N21/814 ,  H04H20/59 ,  H04N21/2383 ,  H04N21/242 ,  H04N21/4302 ,  H04N21/4382

Abstract: When a disaster occurs, a disaster information transmitting apparatus generates disaster information, spreads the disaster information with a spreading code, modulates the spread disaster information, and transmits the modulated disaster information using a guard band of a broadcasting frequency band.

Abstract translation: 发生灾害时，灾害信息发送装置生成灾害信息，利用扩展码扩散灾害信息，调制扩散灾害信息，并使用广播频带的保护频带发送调制灾难信息。