The fourth IEEE MTT-S International Wireless Symposium (IWS 2016) will be held 14 - 16 March 2016 in Shanghai, China. IWS is held annually in China to provide an international forum for the presentation and exchange of the latest technical achievements in microwave circuits, hardware, and RF systems related to the physical layer aspects of existing and emerging wireless systems. In addition, IWS 2016 will arrange special sessions that focus on the Internet-of-Things (IoT), which encompasses but not limited to aspects of: ultra-low power consumption, low-cost systems, and novel wireless architectures. IWS 2016 will feature parallel session tracks, workshops, and a technology exhibition showcasing the latest wireless commercial products. Selected papers may be fast-tracked for an IEEE MTT Transaction Special Issue. More information can be found at www.iws-ieee.org.