Research on Power Allocation of SWIPT System Based on Stackelberg Game

• 1、School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876

Abstract：With the rapid development of wireless communication technology, a series of challenging issues appear in the basic theory and engineering technology level, the core of which is the node energy limited problem. The technology of simultaneous wireless information and power transfer (SWIPT) provides a possibility to solve this problem. In this paper, a multi-user SWIPT secure communication system is considered. The system has a eavesdropper to intercept the information transmitted by the source nodes and a friendly artificial interference node to suppress the malicious eavesdropping. Besides, all receivers are equipped with a power splitter to harvest energy. The optimization problem of maximizing the secret information rate is established under the constraints of the transmitting power of the source nodes and the jammer and the received energy. To solve the power allocation problem，the Stackelberg game theory is applied and a power allocation algorithm based on Stackelberg game is proposed. Based on the algorithm, we build a simulation system in Matlab. Simulation results show that the proposed algorithm can effectively improve the system performance.

Keywords： wireless communication simultaneous wireless information and power transfer power allocation Stackelberg game