© The Author(s) (published by IEEE Switzerland Chapter on Digital Communications and ETH Zurich) Posted on April 16, 2014 by SCG DR Copyright Holders: © The Author(s) (published by IEEE Switzerland Chapter on Digital Communications and ETH Zurich) a Self-archiving policy Conditions Accepted version: ? a Published version: √ a Remarks: International Zurich Seminar on Communications The IZS is organized by the IEEE Switzerland Chapter on Digital Communications in collaboration with ETH Zurich. The authors will retain copyright of their work. There is no problem from IZS’s point of view in storing the published version in your repository. (verified by Bo Siang via email) Verification Date: 08.04.2014