Journal of the Korea Society of Computer and Information (한국컴퓨터정보학회논문지)

Korean Society of Computer Information (한국컴퓨터정보학회)
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Performance Analysis of Digital M/W Transmission System adopting Frequency Offset Compensation Algorithm in Multipath Fading Channel

다중경로 페이딩 채널에서 주파수 옵셋 보상 알고리즘을 적용한 디지털 M/W 전송 시스템의 성능 분석

  • Park, Ki-Sik (Dept. of Information and Communication, Inha Technical College)
  • 박기식 (인하공업전문대학 정보통신과)
  • Received : 2013.10.13
  • Accepted : 2013.10.24
  • Published : 2013.10.31
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Abstract

In this paper, we investigated frequency synchronization through computer simulation of digital M/W transmission system in multipath fading channel. we suggested frequency offset correction algorithm against frequency offset between transmitter and receiver, then evaluated the degree of constellation performance enhancement. From the performance evaluation, in case of large frequency offset, although adopting frequency offset correction scheme, residual frequency offset degraded system performance. As a result, according to frequency offset value between transmitter and receiver residual frequency offset affects system performance significantly. The results of this paper should be utilized for frequency synchronization criterion when frequency band of broadcasting system is rearranged.

본 논문에서는 다중 경로 페이딩 채널을 고려한 환경에서 디지털 M/W전송 시스템의 동기에 관한 모의 시뮬레이터를 구성하여 주파수 동기를 수행하였고, 송신단과 수신단의 주파수 허용 편차(오실레이터 간 오차 범위)로 발생되는 주파수 옵셋에 보상 알고리즘을 적용하여 신호 성좌도(constellation)의 성능 개선 정도를 평가하였다. 성능 분석 결과, 송 수신단의 주파수 허용 편차가 큰 상태에서는 주파수 옵셋을 보상해도 주파수 허용 편차가 이미 크기 때문에 잔류 주파수의 영향을 상대적으로 많이 받게 됨을 알 수 있었다. 결과적으로 송수신단의 주파수 허용 편차에 따라 잔류 주파수 옵셋이 시스템 성능에 큰 영향을 미치게 됨을 알 수 있었다. 본 결과물은 향후 방송중계용 시스템의 대역 이전 시 필요한 주파수 동기 기준으로 활용 가능할 것이다.

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References

  1. "A study on management of utilizing radio wave resource," RAPA advisory board for radio wave utilization, 2000. 12. 31.
  2. "A study on the plan for activating M/W frequency utilization," RAPA advisory board for radio wave utilization, 2000. 12. 31.
  3. Report "Total research for usage plan of frequency resource," RAPA, 1999. 12. 31.
  4. "RF/MW wireless technology workshop," Sungsil University RF/ Microwave Education Center, 2000. 12. 26.
  5. "Chronology of radio wave broadcasting industry," RAPA, 2000.
  6. "2000 Spectrum engineering technology workshop," KIEES, 2000. 10. 27.
  7. "A study on mid-long term frequency utilization plan," fixed communication study group, 2001. 4. 25.
  8. Report, "Technical plan for promotion of effective utilization radio wave," Japan Electric communication technology commission , Mar. 2000.
  9. Robert J. Matheson, "Spectrum Usage for the Fixed Service," NTIA Report 00-378, Mar. 2000.
  10. "Strategy for the future use of the Radio Spectrum in UK 2000," Radiocommunication Agency 2000.
  11. M. Morelli, C.-C. J. Kuo, and M. O. Pun, "Synchronization techniques for orthogonal frequency division multiple access (OFDMA) : A tutorial review," in Proc. IEEE, vol. 95, no. 7, pp. 1394-1427, July 2007. https://doi.org/10.1109/JPROC.2007.897979
  12. A. Laourine, A. Stephenne, and S. Affes, "A new OFDM synchronization symbols for carrier frequency offset estimation," IEEE Signal Process. Lett., vol. 14, pp. 321-324, May 2007. https://doi.org/10.1109/LSP.2006.888353
  13. G. Ren, Y. Chang, H. Zhang, and H. Zhang, "An efficient frequency offset estimation method with a large range for wireless OFDM systems," IEEE Trans. Vehic. Technol., vol. 56, pp. 1892-1895, July 2007. https://doi.org/10.1109/TVT.2006.878560
  14. Meng Jingbo, Kang Guihua, "A novel OFDM synchronization algorithm based on CAZAC sequence," International Conference on Computer Application and System Modeling, 2010.
  15. Yan Chunlin, Li Shaoqian, Tang Youxi, "New frequency offset estimation method for OFDM systems by using CAZAC sequence," Journal of Electrics & Information Technology, 2006.
  16. Sun Xianpu, Jin Huafeng, Wang Yue, "A new timing and frequency synchronization method for OFDM systems," Journal of Xidian University, 2006.