The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Decision-directed channel estimation in TETRA system

TETRA 시스템에서 Decision-directed 기법을 이용한 채널 추정 기법

  • 황원식 (서울대학교 전기공학부 송수신기술연구실) ;
  • 이용환 (서울대학교 전기공학부 송수신기술연구실)
  • Published : 2009.02.28
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Abstract

TETRA Enhanced Data Service (TEDS), which is an upgrade version of narrow-band ETSI TETRA Release 1 system, can support high speed packet data services in frequency selected fading channel. The performance of M-QAM transceivers employed in the TEDS is significantly affected by the accuracy of channel estimation. In this paper, we consider the design of a decision-directed channel estimation scheme robust to fast fading by estimating the channel by means of a per-survivor processing (PSP) method. The performance of the proposed channel estimation scheme is verified by computer simulation.

TETRA Enhanced Data Service (TEDS) 는 기존의 협대역 ETSI TETRA Release 1 표준안을 개선하여 주파수 선택적인 페이딩 채널에서 고속의 패킷 데이터 전송이 가능한 표준 규격이다. TEDS 표준에서 사용하는 M-QAM 변조방식의 성능은 채널 추정 성능에 크게 영향을 받는다. 본 논문에서는 Per-Survivor Processing (PSP) 기법을 사용하여 고속 채널 환경에 적합한 새로운 decision-directed 채널 추정 기법을 제안한다. 제안된 채널 추정기법은 이동 환경에서 기존 파일럿 신호 기반의 채널 추정 기법에 비해 TETRA 수신 성능을 향상시킬 수 있음을 전산 모의 실험을 통해 보인다.

Keywords

References

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