Advanced Channel Estimation Method for IEEE 802.11p/WAVE System
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초록
In this paper, we propose an advanced Minimum Mean Square Error (MMSE) channel estimation method for IEEE 802.11p/Wireless Access in Vehicular Environments (WAVE) systems. To improve the performance of MMSE method, we apply the Weighted Sum using Update Matrix (WSUM) scheme to the step of calculating the instantaneously estimated channel and then, a time domain selectively averaging method is applied after the WSUM scheme. Based on that, the accuracy of instantaneously estimated channel increases and then, the accuracy of auto covariance matrix also increases. Consequently, we can achieve the performance gain over the conventional MMSE method. Through simulations based on the IEEE 802.11p standard, it is confirmed that the proposed scheme can outperform the existing channel estimation schemes.
Abstract
In this paper, we propose an advanced Minimum Mean Square Error (MMSE) channel estimation method for IEEE 802.11p/Wireless Access in Vehicular Environments (WAVE) systems. To improve the performance of MMSE method, we apply the Weighted Sum using Update Matrix (WSUM) scheme to the step of calculating the instantaneously estimated channel and then, a time domain selectively averaging method is applied after the WSUM scheme. Based on that, the accuracy of instantaneously estimated channel increases and then, the accuracy of auto covariance matrix also increases. Consequently, we can achieve the performance gain over the conventional MMSE method. Through simulations based on the IEEE 802.11p standard, it is confirmed that the proposed scheme can outperform the existing channel estimation schemes.
참고문헌 (8)
- "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", ~ (2014)
- Malik Kahn, "IEEE 802.11 Regulatory SC DSRC Coexistence Tiger Team – V2V Radio Channel Models", ~ (2014)
- 임성묵, "IEEE 802.11p 기반 차량 간 통신 시스템에서 패킷 에러율 향상을 위한 반복적 채널 추정 기법", 한국정보기술학회논문지, 14(12), pp.79~88 (2016), 한국정보기술학회[DOI]
- Zijun Zhao, "Channel Estimation Schemes for IEEE 802.11p Standard", IEEE Intelligent Transportation Systems Magazine, 5(4), pp.38~49 (2013), Institute of Electrical and Electronics Engineers (IEEE)[DOI]
- Yoon Kyeong Kim, "Time and frequency domain channel estimation scheme for IEEE 802.11p", Intelligent Transportation Systems (ITSC), 2014 IEEE 17th International Conference on, pp.1085~1090 (2014)
- 최주영, "IEEE 802.11p", WAVE 시스템을 위한 가상 기준신호를 이용한 MMSE 채널 추정 기법, 2016, pp.14(6), 51~57[DOI]
- Joo-Young Choi, "Adaptive Channel Estimation Based on a Decision Method Using a Long Preamble for the IEEE 802.11p", Proc. VTC2017-Spring, pp.8108356~ (2017)
- 박초은, "Advanced Channel Estimation Schemes Using CDP based Updated Matrix for IEEE802.11p", WAVE Systems, 2018, pp.14(1), 39~44[DOI]