Proceedings of the Korea Electromagnetic Engineering Society Conference (한국전자파학회:학술대회논문집)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Performance Analysis of OFDM/QPSK-DMR System Using Band-limited Pulse Shaping Filter over the Microwave Channel

Microwave 채널 환경에서 대역 제한 필터를 적용하는 OFDM/QPSK-DMR 시스템의 성능 분석

  • Ahn, Jun-Bae (R&D Team. SOLiD Technologies, Inc.) ;
  • Yang, Hee-Jin (Dept. of Inform. & Telecomm. Eng., Graduate School of Hankuk Aviation Univ.) ;
  • Oh, Chang-Heon (School of Inform. Tech., Korea Univ. of Tech. and Edu.) ;
  • Cho, Sung-Joon (School of Electronics, Telecomm. and Computer Eng. of Hankuk Aviation Univ.)
  • 안준배 ((주)쏠리테크 R&D팀) ;
  • 양희진 (한국항공대학교 대학원 정보통신공학과) ;
  • 오창헌 (한국기술교육대학교 정보기술공학부) ;
  • 조성준 (한국항공대학교 전자.정보통신.컴퓨터공학부)
  • Published : 2003.11.15
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Abstract

In this paper, we have proposed a OFDM/QPSK-DMR(Orthogonal frequency Division Multiplexing/Quadrature Phase Shift Keying Modulation-Digital Microwave Radio)system using BL-PSF(Band-limited pulse shaping filter) over the Microwave channel. In the proposed DMR system, STS-1(51.84 Mbps) of SONET(Synchronous Optical NETwork) is first modulated by OFDM/QPSK symbol and used Band-limited pulse shaping filter. The advantage of the proposed DMR system is to simplify system complexity and increase IFFT/FFT block use-efficiency. The system performance of single carrier and OFDM systems is already proved that those of DMR systems have the same performance over AWGN(Additive White Gaussian Noise) channel environment. Therefore, the system is analyzed between proposed OFDM/QPSK-DMR and single carrier DMR systems and simulated by BER performance and Signature curve over Microwave channel environment. Simulation result is that the proposed system performances are approaching to the performance of single carrier DMR system as the number of Sub-carriers increasing.

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