138 / 2016-11-09 11:21:12

Protocols of Simultaneous Wireless Information and Power Transfer Scheme for Multi-carrier DCSK

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In this paper, we study the simultaneous wireless information and power transfer (SWIPT) in the multi-carrier differential chaos shift keying (MC-DCSK) communication system.
We consider two energy harvesting protocols with a power splitting (PS) receiver. In the first protocol, only a fraction of reference sub-carrier signal is used for energy harvesting. In the second one, a fraction of all sub-carriers signal are used for energy harvesting. We derive the error performance of information decoding of the two protocols with harvested energy constraints. Then we further optimize the power allocation on sub-carriers by minimizing bit error ratio (BER) of information decoding. The tradeoffs between error performance and harvested energy are obtained with the optimal sub-carrier power ratio. In addition, we compare the throughput and harvested energy of two protocols with total transmitted power and bandwidth constraints.