1. Department of Electrical Engineering, Polytechnique Montréal, Montreal, QC, Canada
2. Department of Electrical and Computer Engineering, University of Calgary, Calgary, AB, Canada
3. Communications and Microelectronic Laboratory (LACIME), École de Technologie Supérieure, Montreal, QC, Canada
4. School of Microelectronics, Northwestern Polytechnical University, Xi’an, China
5. Department of Electronic Engineering, Tsinghua University, Beijing, China