* 7 pages, 3 tables, 1 Figure, substantial text overlap with
arXiv:1506.08910; Accepted for publication at AAAI 2017; added new
experimental results comparing our method to a single layer neural network Access Paper or Ask Questions
* 19 pages, 2 figures. Preliminary version to appear in IEEE ISIT 2014.
Added acknowledgements and made the proof of the "equality" part of Theorem 3
explicit in Appendix C Access Paper or Ask Questions