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Acquisition of Channel State Information for mmWave Massive MIMO Traditional and Machine Learning-based Approaches

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Document pages: 7 pages

Abstract: The accuracy of available channel state information (CSI) directly affectsthe performance of millimeter wave (mmWave) communications. In this article, weprovide an overview on CSI acquisition including beam training and channelestimation for mmWave massive multiple-input multiple-output systems. The beamtraining can avoid the estimation of a large-dimension channel matrix while thechannel estimation can flexibly exploit advanced signal processing techniques.After discussing the traditional and machine learning-based approaches in thisarticle, we compare different approaches in terms of spectral efficiency,computational complexity, and overhead.

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