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Performance evaluation of data communication in wireless power transfer under multiple terminals

Magnetic resonant coupling is one of wireless power transfer techniques and uses the LC resonant circuit as the receiving and transmitting antenna. In order to wirelessly transfer power safely and efficiently, element values, required power and frequency are used to tune the required power signal. Moreover, each receiver has the interference from others under multiple receivers, which affects the data communication. This paper investigates data communication in a wireless power transfer system under multiple terminals. We apply code division multiple access (CDMA) to wirelessly transfer power. Numerical results show that the bit error rate performance of CDMA scheme with RAKE receiver is improved even for high values of the coupling efficient k.