Mitigating the Time-Varying Doppler Shift in High-Mobility Wireless Communications Using Multi-Angle Centered Discrete Fractional Fourier Transform
Mitigating the Time-Varying Doppler Shift in High-Mobility Wireless Communications Using Multi-Angle Centered Discrete Fractional Fourier Transform
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DOI：
10.1109/uemcon53757.2021.9666526
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发表时间：
2021-12
期刊：
影响因子：
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通讯作者：
A. Nafchi;Mona Esmaeili;A. Ghasempour;E. Hamke;Balu Santhanam;Ramiro Jordan
中科院分区：
文献类型：
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作者：
A. Nafchi;Mona Esmaeili;A. Ghasempour;E. Hamke;Balu Santhanam;Ramiro Jordan
本文研究了移动收发器和基站（BS）之间的高移动性通信，并提出了一种具有多普勒抑制的时频方案。所提出的方案采用多角度中心离散分数傅里叶变换（MA-CDFRFT）来减轻多普勒和线性调频频移。时变多径多普勒信道模型用于描述无线通信中的大多数移动场景。移动性会对标准时不变模型产生时变干扰，因此，应用 MA-CDFRFT 来最小化信道失真。仿真结果验证了该方案有效地抑制了时变失真。
This paper investigates high-mobility communications between a moving transceiver and a base station (BS) and proposes a time-frequency scheme with Doppler suppression. The proposed scheme employs the multi-angle centered discrete fractional Fourier transform (MA-CDFRFT) to mitigate the Doppler and chirp shifts. A time-varying multi-path Doppler channel model is used to describe most moving scenarios in wireless communications. Mobility induces time-varying interference to the standard time-invariant model, therefore, the MA-CDFRFT is applied to minimize the channel distortions. Simulation results verify that the proposed scheme effectively suppresses the time-varying distortions.