Deep Learning for mmWave Beam and Blockage Prediction Using Sub-6 GHz Channels

Muhammad Alrabeiah, Ahmed Alkhateeb

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Predicting the millimeter wave (mmWave) beams and blockages using sub-6 GHz channels has the potential of enabling mobility and reliability in scalable mmWave systems. Prior work has focused on extracting spatial channel characteristics at the sub-6 GHz band and then use them to reduce the mmWave beam training overhead. This approach still requires beam refinement at mmWave and does not normally account for the different dielectric properties at the different bands. In this paper, we first prove that under certain conditions, there exist mapping functions that can predict the optimal mmWave beam and blockage status directly from the sub-6 GHz channel. These mapping functions, however, are hard to characterize analytically which motivates exploiting deep neural network models to learn them. For that, we prove that a large enough neural network can predict mmWave beams and blockages with success probabilities that can be made arbitrarily close to one. Then, we develop a deep learning model and empirically evaluate its beam/blockage prediction performance using a publicly available dataset. The results show that the proposed solution can predict the mmWave blockages with more than 90% success probability and can predict the optimal mmWave beams to approach the upper bounds while requiring no beam training overhead.

Original languageEnglish (US)
Article number9121328
Pages (from-to)5504-5518
Number of pages15
JournalIEEE Transactions on Communications
Volume68
Issue number9
DOIs
StatePublished - Sep 2020

Keywords

  • 5G
  • deep learning
  • machine learning
  • massive MIMO
  • mmWave
  • neural networks

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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