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Pilot Subcarrier Based Channel Estimation Scheme in IEEE 802.11p Systems
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 Title & Authors
Pilot Subcarrier Based Channel Estimation Scheme in IEEE 802.11p Systems
Ren, Yongzhe; Park, Dong Chan; Kim, Suk Chan;
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It has been grown interests of the convergence technologies about communication systems and vehicular industry. Vehicular communications enable a number of infotainment applications to serve cars under high mobility environments. To achieve this goal, a robust and accurate channel estimation scheme is of great importance. This paper proposes an enhanced Decision-Directed channel estimation scheme called PTAU(Pilot Tone Aided Update) for IEEE 802.11p in vehicular communication environment. Existing approaches which use subsequent data symbols to estimate channel response in time domain will lead to the error propagation. In this paper, we use the pilot subcarriers to get initial channel response, then utilize the correlation characteristics to update channel response in frequency domain. Finally, Analysis and simulation results reveal that the proposed scheme outperforms in bit error rate(BER), significantly improve the performance of the estimation.
Channel Estimation;IEEE 802.11p;Vehicular Communication;Decision-Directed;OFDM;
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블라인드 채널에서 수신 신호 분석 기법을 사용한 변조 및 채널 상태 추정 알고리즘,최민환;남해운;

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