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

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

A Resource Management Technique for OFDM-based Digital Duplex Systems

OFDM 기반의 디지털 이중화 시스템을 위한 자원 관리 기법

  • Park, Chang-Hwan (School of Electrical & Electronic Engineering, Chung-Ang University) ;
  • Kim, Moo-Chul (School of Electrical & Electronic Engineering, Chung-Ang University) ;
  • Ko, Yo-Han (School of Electrical & Electronic Engineering, Chung-Ang University) ;
  • Park, Kyung-Won (Advanced Mobile Technology Research Center, Korea Electronics Technology Institute) ;
  • Jeon, Won-Gi (Advanced Mobile Technology Research Center, Korea Electronics Technology Institute) ;
  • Paik, Jong-Ho (Advanced Mobile Technology Research Center, Korea Electronics Technology Institute) ;
  • Lee, Seok-Pil (Broadcasting.Communication Convergence Research Center, Korea Electronics Technology Institute) ;
  • Cho, Yong-Soo (School of Electrical & Electronic Engineering, Chung-Ang University)
  • 박창환 (중앙대학교 전자전기공학부) ;
  • 김무철 (중앙대학교 전자전기공학부) ;
  • 고요한 (중앙대학교 전자전기공학부) ;
  • 박경원 (전자부품연구원) ;
  • 전원기 (전자부품연구원) ;
  • 백종호 (전자부품연구원 모바일단말연구센터) ;
  • 이석필 (KETI 디지털미디어연구센터) ;
  • 조용수 (중앙대학교 전자전기공학부)
  • Published : 2009.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, a resource management technique for digital duplexing (DD) systems using orthogonal frequency division multiple access (OFDMA) is proposed. The proposed technique can reduce the dynamic range of the signal received at the subscriber station (SS) and minimize the effects of inter-symbol interference (ISI) and inter-carrier interference (ICI) due to the time difference of arrival (TDoA) without using a cyclic suffix. It is shown by computer simulation that the proposed technique can reduce the number of bits for an analog-to-digital converter (ADC) and increase the signal-to-interference and noise ratio (SINR) significantly.

본 논문에서는 OFDMA 기반의 디지털 이중화 방식을 위한 자원 관리 기법을 제안한다. 제안된 자원 관리 기법은 CS(Cyclic Suffix)를 사용하지 않으면서 TDoA(Time Difference of Arrival)에 의한 ISI(Inter Symbol Interference)와 ICI(Inter Carrier Interference)의 영향을 최소화 하며, SS(Subscriber Station)에 수신되는 신호의 dynamic range를 줄인다. 제안된 자원 관리 기법은 ADC(Analog to Digital Converter)의 비트 수를 줄이며, SINR(Signal to Interference and Noise Ratio)를 크게 향상시킴을 모의실험을 통하여 확인한다.

Keywords

References

  1. F. Sjoberg, M. Isaksson, R. Nilsson, P. Odling, S. K. Wilson, and P. O. B$\ddot{o}$rjesson, 'Zipper: A Duplex Method for VDSL Based on DMT,' IEEE Trans. Commun., Vol.47, Aug., 1999
  2. D. Steer, K. Teo and B. Kirkland, 'Novel method for communications using orthogonal division duplexing of signals (ODD),' VTC' 2002, Vol.1, pp.381-385, Sep., 2002 https://doi.org/10.1109/VETECF.2002.1040369
  3. R. Kimura and S. Shimamoto, 'An Orthogonal Frequency Division Duplex (OFDD) System Using an Analog Filter Bank,' WCNC'2007, pp.2275-2280, Mar., 2007
  4. C. H. Park et al., 'A Synchronous Digital Duplexing Technique for Wireless Transmission in Indoor Environments,' VTC'2009, Apr.,2009 https://doi.org/10.1109/VETECS.2009.5073350
  5. Y. Mostofi and D.C. Cox, 'Mathematical analysis of the impact of timing synchronization errors on the performance of an OFDM system,' IEEE Trans. Commun., Vol.54, pp.226 -230, Feb., 2006 https://doi.org/10.1109/TCOMM.2005.861675