Simultaneous Wireless Information and Power Transfer for IoT

Wireless energy transfer technology enables tiny electronic devices in the Internet of Things to harvest energy from radio frequency signals. Radio frequency signals also have been used to carry information in the area of wireless communications for more than one century. Therefore, it is feasible to simultaneously transfer information and energy, from a dual functional access point, to wireless user terminal. Moreover, modern multiple antenna techniques saves both information and energy transmission from the severe channel fading and their performance can be significantly enhanced. However, this benefit high relies on availability and accuracy of channel state information at the transmitter side. To study the impacts of imperfect knowledge of channel on the system performance, a MISO SWIPT system with frequency division duplexing is proposed in this thesis. The trade-off of channel estimation will be studied and evaluated. In order for the system to achieve the optimal performance, a transmission protocol will be developed and evaluated.