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Enhanced channel estimation algorithm for dedicated short-range communication systems
Telkomnika (Telecommunication Computing Electronics and Control) Số 3, năm 2015 (Tập 13, trang 870-879)
ISSN: 16936930
ISSN: 16936930
DOI: 10.12928/TELKOMNIKA.v13i3.1974
Tài liệu thuộc danh mục: Scopus
Article
English
Từ khóa: Algorithms; Dedicated short range communications; Field programmable gate arrays (FPGA); Frequency division multiplexing; Frequency domain analysis; Frequency estimation; Frequency response; Least squares approximations; Orthogonal frequency division multiplexing; Signal receivers; Time domain analysis; Vehicle to vehicle communications; Vehicles; Wireless telecommunication systems; Accurate channel estimation; Channel estimation algorithms; Channel frequency response; Information exchanges; Least square estimation; Time-varying characteristics; Wireless propagation channels; Wireless technologies; Channel estimation
Tóm tắt tiếng anh
The Dedicated Short-Range Communication (DSRC) has been widely accepted as a promising wireless technology for enhancing traffic safety. In such DSRC-based vehicle-to-vehicle (V2V) communication systems, because of the extremely time-varying characteristic of wireless propagation channels, accurate channel estimation is essential for reliable information exchange between vehicles. In this paper, the characteristics of the propagation channel and several traditional channel estimation schemes for V2V communications are reviewed. Then, a delay-based channel-frequency-response decomposition scheme is proposed to estimate and predict the double-selective V2V channel while adhering to the IEEE 802.11p standard. The proposed method achieves a more favorable performance than the traditional methods in V2V scenarios by combining the least square estimation in the frequency domain with the linear prediction in time domain. The performance advantages of the proposed scheme are verified by the simulation results from three typical scenarios. Furthermore, a reference design on a field-programmable gate array for the proposed channel estimation scheme is presented for the purpose of demonstrating its implementation feasibility and complexity. © 2015 Universitas Ahmad Dahlan. All rights reserved.
