* The paper has been accepted for publication in the IEEE
Communications Magazine. The current arXiv contains an additional Appendix
that describes the dataset for the setup of Fig. 5 Access Paper or Ask Questions
* 30 pages, 12 figures, 2 tables; This chapter is written for the
forthcoming book, Machine Learning and Wireless Communications (Cambridge
University Press), edited by H. V. Poor, D. Gunduz, A. Goldsmith, and Y.
Eldar Access Paper or Ask Questions