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학술대회 Efficient Doppler Mitigation for High-Speed Rail Communications
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저자
회빙, 김준형, 정희상, 김일규, 이훈
발행일
201602
출처
International Conference on Advanced Communication Technology (ICACT) 2016, pp.634-638
DOI
https://dx.doi.org/10.1109/ICACT.2016.7423500
협약과제
15MI2100, (통합)초연결 스마트 모바일 서비스를 위한 5G 이동통신 핵심기술개발, 정현규
초록
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%.
키워드
Doppler mitigation, HSR communications, LTE, mmWave, OFDM
KSP 제안 키워드
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