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

The Institute of Electronics and Information Engineers (대한전자공학회)
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An Analysis of the Effect of Doppler Spread on Transparent Multi-hop Relays Systems Based on OFDM

OFDM 기반의 트랜스패런트 다중 홉 릴레이 시스템에서 도플러 확산의 영향 분석

  • Published : 2007.05.25
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Abstract

In this paper, the effect of a Doppler Spread caused by a mobile station (MS) is analyzed for transparent mobile multi-hop relays (MMR) systems based on orthogonal frequency division multiplexing (OFDM). The exact expression of interchannel interference (ICI) power and the upper bounds of ICI power are derived for OFDM systems with cooperative MMR or non-coopeartive throughput enhancement (TE) MMR. Also, the exact signal-to-interference ratio (SIR) and its lower bound as well as ICI power and its upper bound, derived in this paper, are evaluated by computer simulation with the OFDM parameter set used for mobile WiMax (WiBro) systems.

본 논문에서는 OFDM(Orthogonal Frequency Division Multiplexing) 기반의 트랜스패런트(transparent) 이동 다중 홉 릴레이(mobile multi-hop relay; MMR)시스템에서 MS(Mobile Station)가 이동함에 따라 발생하는 도플러 확산(Doppler spread)에 대한 영향을 분석한다. 상호협력(cooperative) MMR 또는 비상호협력(non-cooperative) 수율 증가(throughput enhancement;TE) MMR을 갖는 OFDM 시스템에서 부채널간 간섭(interchannel interference; ICI) 전력과 ICI 전력의 상계(upper bound)를 유도한다. 또한, 신호 대 간섭비(signal-to-interference ratio; SIR)와 SIR의 하계(lower bound)를 유도하고, WiBro(mobile WiMAX)용 파라미터를 이용하여 모의 실험을 통해 유도 결과를 검증한다.??

Keywords

References

  1. R. Pabst et. al., 'Relay-Based Deployment Concepts for Wireless and Mobile Broadband Radio,' IEEE Commun. Mag., Vol. 42, pp. 80-89, Sept. 2004 https://doi.org/10.1109/MCOM.2004.1336724
  2. H. Wu, C. Qiao, S. De, and O. Tonguz, 'Integrated Cellular and Ad Hoc Relaying Systems: iCAR,' IEEE J. Select. Areas Commun., Vol. 19, pp. 2105-2115, Oct. 2001 https://doi.org/10.1109/49.957326
  3. J. Cho and Z.J. Haas, 'On the throughput enhancement of the downstream channel in cellular radio networks through multihop relaying,' IEEE J. Select. Areas Commun., Vol. 22, pp. 1206-1219, Sept. 2004 https://doi.org/10.1109/JSAC.2004.829340
  4. N. Esseling, B.H. Walke, and R. Pabst, 'Performance Evaluation of a Fixed Relay Concept for Next Generation Wireless Systems,' PIMRC, Vol. 2, pp. 744-751, Sept. 2004
  5. C. Tepedelenlioglu and G. B. Giannakis, 'On Velocity Estimation and Correlation Properties of Narrow-Band Mobile Communication Channels,' IEEE Transactions on Vehicular Technology, Vol. 50, No.4, July 2001 https://doi.org/10.1109/25.938579
  6. W. C. Jakes, Microwave Mobile Communications, New York IEEE press, 1974
  7. I. R. Capoglu, Y. Li, and A. Swami, 'Effect of Doppler Spread in OFDM based UWB Systems,' IEEE Transactions on Wireless Communications, Vol. 4, No. 5, Sept. 2005 https://doi.org/10.1109/TWC.2005.853978
  8. IEEE Std 802.16e, IEEE Standard for Local and Metropolitan Area Networks Part 16, Feb. 2006