Advanced Channel Estimation Schemes Using CDP based Updated Matrix for IEEE802.11p/WAVE Systems

다국어 초록 (Multilingual 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.

참고문헌 (Reference)

1 X. Cheng, "Wideband Channel Modeling and ICI Cancellation for Vehicle-to-Vehicle Communication Systems" 31 (31): 434-448, 2013

2 Yoon Kyeong Kim, "Time and frequency domain channel estimation scheme for IEEE 802.11p" 1085-1090, 2014

3 J. A. Fernandez, "Performance of the 802.11p Physical Layer in Vehicle-to-Vehicle Environments" 61 (61): 3-14, 2012

4 "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"

5 임성묵, "IEEE 802.11p 기반 차량 간 통신 시스템에서 패킷 에러율 향상을 위한 반복적 채널 추정 기법" 한국정보기술학회 14 (14): 79-88, 2016

6 Malik Kahn, "IEEE 802.11 Regulatory SC DSRC Coexistence Tiger Team - V2V Radio Channel Models"

7 J. Zhao, "Channel Estimation Schemes for IEEE 802.11p Standard" 5 (5): 38-49, 2013

8 Joo-Young Choi, "Adaptive Channel Estimation Based on a Decision Method Using a Long Preamble for the IEEE 802.11p" 2017