International Journal of Contents

The Korea Contents Association (한국콘텐츠학회)
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Advanced Channel Estimation Schemes Using CDP based Updated Matrix for IEEE802.11p/WAVE Systems

  • Park, Choeun (Dept. of Information Technology Convergence Korea National University of Transportation) ;
  • Ko, Kyunbyoung (Dept. of Information Technology Convergence Korea National University of Transportation)
  • Received : 2017.10.17
  • Accepted : 2018.03.27
  • Published : 2018.03.28
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Abstract

Today, cars have developed into intelligent automobiles that combine advanced control equipment and IT technology to provide driving assistance and convenience to users. These vehicles provide infotainment services to the driver, but this does not improve the safety of the driver. Accordingly, V2X communication, which forms a network between a vehicle and a vehicle, between a vehicle and an infrastructure, or between a vehicle and a human, is drawing attention. Therefore, various techniques for improving channel estimation performance without changing the IEEE 802.11p standard have been proposed, but they do not satisfy the packet error rate (PER) performance required by the C-ITS service. In this paper, we analyze existing channel estimation techniques and propose a new channel estimation scheme that achieves better performance than existing techniques. It does this by applying the updated matrix for the data pilot symbol to the construct data pilot (CDP) channel estimation scheme and by further performing the interpolation process in the frequency domain. Finally, through simulations based on the IEEE 802.11p standard, we confirmed the performance of the existing channel estimation schemes and the proposed channel estimation scheme by coded PER.

Keywords

E1CTBR_2018_v14n1_39_f0001.png 이미지

Fig. 1. IEEE 802.11p packet structure

E1CTBR_2018_v14n1_39_f0002.png 이미지

Fig. 2. Packet structure in WAVE frequency and time domain

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Fig. 3. PER versus SNR (dB) with respect to ChannelEstimation Schemes. (16QAM, Code Rate=1/2, Rural LOS,144km/h)

E1CTBR_2018_v14n1_39_f0004.png 이미지

Fig. 4. PER versus SNR (dB) with respect to ChannelEstimation Schemes. (16QAM, Code Rate=1/2, Highway LOS,252km/h)

References

  1. IEEE802.11p, IEEE Standard for Information Technology Telecommunication and Information Exchange Between Systems Local and Metropolitan Area Networks Specific Requirements. part 11: Wireless LAN MAC and PHY Specifications Amendment 6: Wireless Access in Vehicular Environments, 22 Jul. 2014.
  2. Malik Kahn, "IEEE 802.11 Regulatory SC DSRC Coexistence Tiger Team - V2V Radio Channel Models," Feb. 2014.
  3. Sungmook Lim and Changick Song, "Iterative Channel Estimation Method to Enhance PER in V2V Communications Based on IEEE 802.11p," The Journal of Korean Institude of Information Technology, vol. 14, no. 12, Dec. 2016, pp. 79-88.
  4. J. Zhao, X. Cheng, M. Wen, B. Jiao, and C. X. Wang, "Channel Estimation Schemes for IEEE 802.11p Standard," IEEE Intelligent Transportation Systems Magazine, vol. 5, no. 4, winter 2013, pp. 38-49. https://doi.org/10.1109/MITS.2013.2270032
  5. Yoon Kyeong Kim, Jang-Mi Oh, Yoo Ho Shin, and Cheol Mun, "Time and frequency domain channel estimation scheme for IEEE 802.11p," Intelligent Transportation Systems (ITSC), 2014 IEEE 17th International Conference on, 8-11 Oct. 2014, pp. 1085-1090.
  6. Joo-Young Choi, Cheol Mun, and Jong-Gwan Yook, "Adaptive Channel Estimation Based on a Decision Method Using a Long Preamble for the IEEE 802.11p," Proc. VTC2017-Spring, Sydney, Australia, 4-7 Jun. 2017.
  7. J. A. Fernandez, K. Borries, L. Cheng, B. V. K. Vijaya Kumar, D. D. Stancil, and F. Bai, "Performance of the 802.11p Physical Layer in Vehicle-to-Vehicle Environments," IEEE Trans. Veh. Tech., vol. 61, no. 1, Jan. 2012, pp. 3-14. https://doi.org/10.1109/TVT.2011.2164428
  8. X. Cheng, Q. Yao, M. Wen, C. X. Wang, L. Song, and B. Jiao, "Wideband Channel Modeling and ICI Cancellation for Vehicle-to-Vehicle Communication Systems," IEEE J. Sel. Areas Commun., vol. 31, no. 9, Sep. 2013, pp. 434-448. https://doi.org/10.1109/JSAC.2013.SUP.0513039