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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지
DOI QR코드

DOI QR Code

Advanced Synchronization Scheme in the LR-UWB System

LR-UWB 시스템에서 개선된 동기 기법

  • 권순구 (연세대학교 전기전자공학과 IT SoC 설계 연구실) ;
  • 김재석 (연세대학교 전기전자공학과)
  • Received : 2011.01.19
  • Accepted : 2011.06.15
  • Published : 2011.07.30
Download PDF
⟨ Previous Next ⟩

Abstract

This paper proposes a two-stage synchronization scheme using a serial search non-coherent correlator appropriate for the IEEE 802.15.4a system. The proposed method improved the synchronization performance by using multi-pulse signals unlike the conventional method using single-pulse signals. It also compensated for the degradation of performance at low SNR resulting from the use of fixed threshold by applying the adaptive threshold technique. The proposed method showed a detection probability that is higher by approximately 0.2-0.3 compared with the conventional method in the IEEE 802.15.4a channel model.

본 논문에서는 IEEE 802.15.4a 시스템에 적합한 직렬 검색 비동기 상호 상관(serial search non-coherent correlator)을 이용한 두 단계(two-stage) 방식의 동기 방식(synchronization scheme)을 제안한다. 제안된 방식에서는 다중펄스 신호를 사용하여 단일펄스 신호를 이용하는 기존 방식보다 동기성능을 개선하였고, 적응 임계값(adaptive threshold) 기법을 적용하여 고정 임계값(fixed threshold)을 사용함으로써 생기는 낮은 SNR에서의 성능 열화를 보상하였다. 제안된 기법은 IEEE 802.15.4a 채널 모델에서 기존의 기법과 비교하여 약 0.2~0.3우수한 검출 확률(Detection Probability)을 보였다.

Keywords

References

  1. M. Z. Win, R. A. Scholtz, "Impulse radio: how it works," IEEE Comm. Lett., Vol.2, No.2, pp. 36-38, Feb. 1998. https://doi.org/10.1109/4234.660796
  2. Ibrahim J., Buehrer R.M., "Two-Stage Acquisition for UWB in Dense Multipath," IEEE J. Select. Areas Comm., Vol.24, Issue 4, pp.801-807, 2006. https://doi.org/10.1109/JSAC.2005.863832
  3. Yuanliang Huang, Jiangzhou Wang, "Two- Stage Acquisition in Time-hopping Impulse Radio Systems for UWB Communications," IEEE Transaction on Wireless Communication, Vol.6, Issue 10 pp.3578-3588, 2007 https://doi.org/10.1109/TWC.2007.05893
  4. A. Maali, A. Mesloub, M. Djeddou, G. Baudoin, H. Mimoun, and A. Ouldali, "Adaptive CA-CFAR threshold for non coherent IR-UWB energy detector receivers," IEEE Communications Letters, Vol. 13, No. 12, pp. 1-3, December 2009. https://doi.org/10.1109/LCOMM.2009.081446
  5. IEEE 802.15 TG4a Channel Modeling Sub Committee, "IEEE 802.15.4a channel modelfinal report", http://www.ieee802.org/15/pub/ TG4a.htm