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Non-coherent massive MIMO-OFDM for communications in high mobility scenarios
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Authors: Kun Chen-Hu, Yong Liu, Ana Garcia Armada
Status: Final
Date of publication: 11 December 2020
Published in: ITU Journal on Future and Evolving Technologies, Volume 1 (2020), Issue 1, Pages 13-24
Article DOI : https://doi.org/10.52953/QHZV6094
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 | Abstract:
Under scenarios of high mobility, the traditional coherent demodulation schemes (CDS) have a limited performance, due to the fact that reference signals cannot effectively track the variations of the channel with an affordable overhead. As an alternative solution, non coherent demodulation schemes (NCDS) based on differential modulation have been proposed. Even in the absence of reference signals, they are capable of outperforming the CDS with a reduced complexity. The literature on NCDS laid the theoretical foundations for simplified channel and signal models, often single carrier and spatially uncorrelated flat fading channels. In this work, the most recent results assuming orthogonal frequency division multiplexing (OFDM) signaling and realistic channel models are explained, and the impact of some hardware impairments such as the phase noise (PN) and the non linear high power amplifier (HPA) are also considered. Moreover, new potential research lines are also highlighted. |
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Keywords: 5G, channel estimation, MIMO, non-coherent, OFDM
Rights: © International Telecommunication Union, available under the CC BY-NC-ND 3.0 IGO license.
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