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

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

An Analysis of Trellis-Coded Orthogonal Frequency Division Multiplex over Frequency-Selective Fading Channel

주파수선택성 페이딩을 갖는 통신로에 격자부호 직교주파수분할 다중통신방식의 성능 분석

  • Suh, Heejong (Division of Electronic Communication and Electrical Engineering, Yosu National University) ;
  • Zhang, Ke (Dept. of Information Engineering, Beijing Institute of Petro-Chemical Technology)
  • Published : 2004.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we review a trellis-coded orthogonal frequency division multiplex (TC-OFDM) system, which combines OFDM with trellis-coded modulation, for overcoming the frequency selective and multipath fading of time dispersive channels. We simulate and analyse the BER performance of rate 2/3 trellis coded 8DPSK-OFDM over time dispersive channels. Design of the trellis codes at different carrier numbers of OFDM is discussed. Results show that TC-OFDM system can provide 6 dB coding gain at a BER of 10$^{-3}$ compared with OFDM system without coding.

본 논문에서는 시간분산 통신로에 주파수선택성 페이딩과 다중경로 페이딩을 극복하기 위해서, 격자부호 변조와 OFDM을 결합한, 격자부호 직교주파수분할 다중통신방식(TC-OFDM) 시스템의 성능을 분석한다. 시간분산 통신로를 대상으로 부호율 2/3인 격자부호 8DPSK- OFDM의 BER 성능을 모의실험하고 분석한다. OFDM의 여러 반송파 수에 대한 격자부호의 설계를 논의한다. 실험결과, BER 10/sup -3/에서 TC-OFDM 시스템은 부호화를 하지 않은 OFDM 시스템에 비해서 6 dB 부호이득을 얻을 수 있음을 알았다.

Keywords

References

  1. S. Ham, R. Prasad 'Overview of Multicarrier CDMA,' IEEE Comm. Mag., Vol. 35, pp. 126-133, Dec. 1997 https://doi.org/10.1109/35.642841
  2. J. Chuang, L. J. Cimini, Y. Li, B. McNair, N. Sollenberger, H. Zhao, L. Lin, and M. Suzuki, 'High-speed Wireless Data Access Based on Combining EDGE with Wide Band OFDM,' IEEE Comm Mag., vol. 37, pp. 92-98, November 1999 https://doi.org/10.1109/35.803657
  3. Y. Li and L. J. Cimini, 'Bounds on the Interchannel Interference of OFDM in Time-varying Impairments,' IEEE Trans. Comm, vol. 49, no. 3, pp. 401-404, March 2001 https://doi.org/10.1109/26.911445
  4. W.Y. Zou and Y. Wu, 'COFDM: an Overview,' IEEE Trans. on Broadcasting, vol.41, pp.1-8 Mar.1995 https://doi.org/10.1109/11.372015
  5. D. Castelain, B. Le Floch, and R. Halbert-Lassalle, 'Digital sound broadcasting to mobile receivers,' IEEE Trans. Consumer Electron, vol. 73, pp. 30-34, Jan. 1989 https://doi.org/10.1109/30.44309
  6. A. S. Macedo and E. S. Sousa, 'Coded OFDM for broadband indoor wireless systems,' Proa IEEE Int. Conf. Communications(ICC), vol. 2, Montreal, QC, Canada, pp. 934-938, 1997 https://doi.org/10.1109/ICC.1997.610016
  7. G. Ungerboeck, 'Channel Coding with Multilevel Phase Signals,' IEEE Trans. Info. Theory, vol. IT-28, pp. 55-67, Jan. 1982 https://doi.org/10.1109/TIT.1982.1056454
  8. T. May, H. Rohling and V. Engels, 'Performance Analysis of Viterbi Decoding for 64-DAPSK and 64-QAM Modulation OFDM Signals,' IEEE Trans. Comm, vol. 46, no. 2, pp. 182-190, Feb. 1998 https://doi.org/10.1109/26.659477