한국전자파학회논문지 (The Journal of Korean Institute of Electromagnetic Engineering and Science)

  • 제18권7호
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  • Pages.757-765
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  • 2007
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  • 1226-3133(pISSN)
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  • 2288-226X(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
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IQ Imbalance와 위상 잡음을 고려한 OFDM 통신 시스템의 성능 분석

Performance Analysis of OFDM Communication System with the IQ Imbalance and Phase Noise

  • 김상균 (충북대학교 전자공학과 및 컴퓨터정보통신연구소) ;
  • 유흥균 (충북대학교 전자공학과 및 컴퓨터정보통신연구소) ;
  • 강병수 (한국전자통신연구원 이동통신연구단 RF 기술 연구팀) ;
  • 이광천 (한국전자통신연구원 이동통신연구단 RF 기술 연구팀)
  • Kim, Sang-Kyun (Dept. of Electronic Engineering and Research Institute of Computer, Information & Communication, Chungbuk National University) ;
  • Ryu, Heung-Gyoon (Dept. of Electronic Engineering and Research Institute of Computer, Information & Communication, Chungbuk National University) ;
  • Kang, Byung-Su (RF Technology Team, Mobile Telecommunication Research Division, ETRI) ;
  • Lee, Kwang-Chun (RF Technology Team, Mobile Telecommunication Research Division, ETRI)
  • 발행 : 2007.07.31
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⟨ 이전 논문 다음 논문 ⟩

초록

OFDM(Orthogonal Frequency Division Multiplexing) 시스템은 이동성이 있는 고속 데이터 전송에 적합한 전송 방법으로 널리 알려져 있지만, 위상 잡음과 직교 불균형(IQ imbalance)에 매우 민감한 특성을 보이는 단점이 있다. 그러므로, 본 논문에서는 위상 잡음 특성에 따른 위상 잡음 분산을 계산한 다음, 직교 불균형이 있는 OFDM 시스템의 통신 성능을 분석하였다. 시뮬레이션 결과, 위상 잡음의 분산과 직교 불균형의 크기 변화에 따라 통신 성능이 변화하는 것을 분석하였다. 분석 결과, 진폭 불균형이 ${\varepsilon}$=0.2; 0.3; 0.4이고, 위상 불균형이 ${\phi}=10^0$이고, 위상 잡음의 분산 ${\sigma}^2=0.012$일 때, BER은 $10^{-5}$에서 각각 2.88 dB, 3.61 dB, 4.69 dB의 SNR penalty가 존재한다.

OFDM system is an excellent high speed transmission method but it is seriously sensitive to the phase noise and IQ imbalance. Therefore, in this paper, we analyze the communication performance of the OFDM communication system with IQ imbalance and phase noise. Phase noise's variance can be calculated by integral calculus of phase noise power spectrum. From simulation results, it can be shown that the BER performances show different change according to the phase noise variance and IQ imbalance amount. When amplitude imbalance is ${\varepsilon}$=0.2; 0.3; 0.4 and phase imbalance is ${\phi}=10^0$, and distribution of phase noise is ${\sigma}^2=0.012$, BER is degraded by 2.88 dB, 3.61 dB, 4.09 dB in $10^{-5}$ in the respect of the SNR penalty.

키워드

참고문헌

  1. B. Le Floch, R. H. Lassalle, and D. Castelain, 'Digital sound broadcasting to mobile receivers', IEEE Trans. Consumer Electronics, vol. 35, no. 3, pp. 493-503, Aug. 1989 https://doi.org/10.1109/30.44309
  2. EBU/CENELEC/ETSIT JTC, 'Digital broadcasting systems for television, sound and data services, framing structure, channel coding and modulation for digital terrestrial television', TM 1545 rev. 2, Jan. 1996
  3. J. Van de Beek et al., 'On synchronization in an OFDM based UMTS proposal', in Proc. COST 254 Emergent Techniques for Communication Terminals, Toulouse, France, Jul. 1997
  4. Ana Garcia Armada, 'Understanding the effects of phase noise in OFDM', IEEE Transactions on Broadcasting, vol. 47, no. 2, pp. 153-159, Jun. 2001 https://doi.org/10.1109/11.948268
  5. A. A. Abidi, 'Direct-conversion radio transceivers for digital communications', IEEE Journal of Solid-State Circuits, vol. 30, Issue 12, pp. 1399-1410, Dec. 1995 https://doi.org/10.1109/4.482187
  6. B. Razavi, 'Design considerations for direct-conversion receivers', IEEE Transactions on Circuits and Systems II, vol. 44, Issue 6, pp. 428-435, Jun. 1997 https://doi.org/10.1109/82.592569
  7. B. Razavi, RF Microelectronics, Prentice Hall, Upper Saddle River, NJ, 1998
  8. C. L. Liu, 'Impacts of I/Q imbalance on QPSKOFDM-QAM detection', IEEE Transactions on Consumer Electronics, vol. 44, Issue 3, pp. 984-989, Aug. 1998 https://doi.org/10.1109/30.713223
  9. M. Buchholz, A. Schuchert, and R. Hasholzner, 'Effects of tuner IQ imbalance on multicarriermodulation systems', Proc. IEEE International Caracas Conference on Devices, Circuits and Systems, pp. T65/1-T65/6, Mar. 2000
  10. A. Tarighat, A. H. Sayed, 'MIMO OFDM receivers for systems with IQ imbalances', IEEE Transactions on Signal Processing, vol. 53, Issue 9, pp. 3583-3596, Sep. 2005 https://doi.org/10.1109/TSP.2005.853148
  11. H. Shafiee, S. Fouladifard, 'Calibration of IQ imbalance in OFDM transceivers', IEEE International Conference on Communications ICC '03, vol. 3, pp. 2081-2085, May 2003
  12. J. Tubbax et al., 'Joint compensation of IQ imbalance and frequency offset in OFDM systems', IEEE Global Telecommunications Conference GLOBECOM '03, vol. 4, pp. 2365-2369, Dec. 2003
  13. J. Tubbax et al., 'Compensation of IQ imbalance and phase noise in OFDM systems', IEEE Transactions on Wireless Communications, vol. 4, Issue 3, pp. 872-877, May 2005 https://doi.org/10.1109/TWC.2004.843057
  14. T. Pollet, M. van Bladel, and M. Moeneclaey, 'BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise', IEEE Transactions on Communication, vol. 43, no. 2/3/4, pp. 191-193, Feb./Mar./Apr. 1995 https://doi.org/10.1109/26.380034
  15. M. Valkama, M. Renfors, and V. Koivunen, 'Advanced methods for I/Q imbalance compensation in communication receivers', IEEE Transactions on Signal Processing, vol. 49, Issue 10, pp. 2335-2344, Oct. 2001 https://doi.org/10.1109/78.950789
  16. Claus Muschallik, 'Influence of RF oscillators on an OFDM signal', IEEE Transactions on Consumer Electronics, vol. 41, no. 3, pp. 592-603, Aug. 1995 https://doi.org/10.1109/30.468090
  17. 이영선, 유흥균, 정영호, 함영권, 'OFDM 통신시스템에서 위상 잡음분석', 한국전자파학회논문지, 15(11), pp. 1043-1050, 2004년 11월
  18. H. Nikookar, R. Prasad, 'On the sensitivity of multicarrier transmission over multipath channels to phase noise and frequency offset', PIMRC' 1996, 7th IEEE International Symposium, vol. 1, pp. 68-72, Oct. 1996
  19. Nguyen Thanh Hieu, Byung-Su Kang, Kwangchun Lee, and Heung-Gyoon Ryu, 'Derivation and analysis of the BER closed form in the OFDM communication system with IQ imbalance', Journal of the Korea Electromagnetic Engineering Society, vol. 6, no. 3, pp. 182-188, Sep. 2006