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Conference Paper Efficient Doppler Mitigation for High-Speed Rail Communications
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Authors
Bing Hui, Junhyeong Kim, Hee-Sang Chung, Il-Gyu Kim, Hoon Lee
Issue Date
2016-02
Citation
International Conference on Advanced Communication Technology (ICACT) 2016, pp.634-638
Publisher
IEEE
Language
English
Type
Conference Paper
DOI
https://dx.doi.org/10.1109/ICACT.2016.7423500
Abstract
Since the high-speed rail (HSR) communications are suffering from the huge Doppler shift, an efficient Doppler mitigation method is proposed in this paper. The proposed method mainly concerns about the mitigation of Doppler shift in OFDM based systems, especially for the case of employing mmWave with very high mobility. The proposed method can be used for both downlink and uplink of the system and it is quite robust to the time-varying mobility. Furthermore, the pilot-aided channel estimation for Doppler compensation is not necessary in most of the cases, which indicates the pilot density in time-domain can be reduced. Simulation results show that by using the proposed method, the residual Doppler shift can be compressed to 0 Hz with the probability of 90%.
KSP Keywords
Channel estimation(CE), Doppler Shift, Doppler compensation, High Mobility, High-Speed Rail, based system, mitigation method, pilot-aided channel estimation, simulation results, time-domain, time-varying