Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Implementation and Verification of Channel Adaptive Private Broadcasting System Based on USRP

USRP기반 채널 적응형 개인방송시스템 구현 및 검증

  • Yoo, Sinwoo (Department of Electronics and Comm. Engineering, Kwangwoon University) ;
  • Oh, Hyukjun (Department of Electronics and Comm. Engineering, Kwangwoon University)
  • Received : 2022.04.01
  • Accepted : 2022.04.14
  • Published : 2022.05.31
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Abstract

This paper shows a small and low-powered wireless communication system based on the ATSC broadcasting system using the ISM frequency band that can be used as a PBS(Personal Broadcasting System). It is designed to demonstrate a channel-adaptive CR(Cognitive Radio) system to provide a better service quality in the unlicensed band where co-channel interference exists. And it achieved very reliable communications by a closed-loop active phased array antenna. This ATSC-based personal broadcasting platform can be modified easily with given flexibility by using GNU Radio as an open-source signal processing platform based on USRP and implementing additional functions in FPGA. In addition, the chosen communication frequency resource can be managed and controlled by the return channel that transmits the channel status and communication parameters between transmission and reception in real-time.

본 연구에서는 ATSC 기반 무선통신시스템을 비면허대역에서 개인방송시스템으로 활용 가능함을 보였다. 혼/간섭 신호가 존재하는 비면허대역에서 양질의 서비스를 제공하기 위하여 CR 개념을 도입한 채널 적응형 시스템으로 설계하였으며, 폐루프 능동위상배열안테나를 설계하여 연동함으로써 고신뢰성 통신이 가능함을 보였다. USRP기반으로 하는 오픈소스 신호처리 플랫폼인 GNU Radio를 사용하였고 이와 더불어 내부 FPGA에 추가적인 기능을 구현함으로써, 사용자가 원하는 ATSC 기반 개인방송 플랫폼을 쉽고 유연하게 설계하고 수정할 수 있도록 하였다. 또한, 실시간으로 송수신 간 채널의 상태 및 통신 파라미터 등의 정보를 전송하는 리턴 채널과 스펙트럼 검출을 구현하여 통신 주파수 자원을 효율적으로 관리 및 제어할 수 있도록 하였다.

Keywords

Acknowledgement

This research was supported by Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Science and ICT(No. 2021M1B3A3102357) and by the Research Grant of Kwangwoon University in 2019.

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