대한전자공학회논문지TC (Journal of the Institute of Electronics Engineers of Korea TC)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

다중경로 환경을 고려한 PPSM 임펄스 시스템의 성능 분석

Performance of PPSM System in multipath channel for UWB Communication

  • 박호환 (인하대학교 정보통신대학원) ;
  • 김진수 (인하대학교 정보통신대학원) ;
  • 황현철 (인하대학교 대학원) ;
  • 곽경섭 (인하대학교 정보통신대학원)
  • Park Ho-Hwan (Graduate school of Information Technology & Telecommunication, Inha University) ;
  • Kim Jin-Su (Graduate school of Information Technology & Telecommunication, Inha University) ;
  • Hwang Hyeon-Chyeol (Graduate school, Inha University) ;
  • Kwak Kyung-Sup (Graduate school of Information Technology & Telecommunication, Inha University)
  • 발행 : 2006.02.01
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초록

최근, UWB 시스템은 많은 연구가들의 관심을 끌고 있다. UWB 시스템은 수$\~$수십 나노초의 임펄스를 사용함으로서 고속의 데이터를 전송할 수 있다. 본 논문에서는 기존의 UWB 임펄스 변조 방식인 PPM 변조 방식과 직교 펄스를 이용한 PSM 변조 방식의 결합 형태인 PPSM 변조 방식의 성능을 AWGN 채널 및 UWB 다중 경로 채널 표준인 SV 채널에서 분석한다. 또한 다중 경로 채널에서 좋은 성능을 보이는 M진 시스템을 위한 최적 심볼 집합을 제시한다. 모의실험을 통하여 PPSM 시스템이 다중경로 지연이 적은 CM1에서 더 좋은 성능을 보이나 2진 시스템과 4진 시스템은 특정 $E_b/N_0$값에서 역전되는 것을 확인하였다.

Recently, Ultra-wideband (UWB) Communication systems have become a popular research topic. UWB system is characterized by the fact that the digital information represented by a subnanosecond pulses is transmitted through the air. In this paper, we consider the PPSM scheme that combine PPM and PSM. We provide the performance in AWGN and SV multipath channel which consists of $CM1\~CM4$. The optimal symbol set for M-ary system in multipath channel which shows good performance is also presented. The simulation results show that the performance in CM4 is worse than that in CMI due to long delay spread, many multipath components, 4-ary system outperforms binary system in Low$E_b/N_0$ but not in high $E_b/N_0$. We find system have the optimal symbol set in multipath channel.

키워드

참고문헌

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