Dual-tone FSK (Frequency Shift Keying) modulation and demodulation system for simultaneous wireless information and power transfer

The invention discloses a dual-tone FSK (Frequency Shift Keying) modulation and demodulation system for wireless information and power transfer, which comprises a dual-tone FSK modulation terminal module and a dual-tone FSK demodulation terminal module, and is a second-order modulation and demodulation system on the whole, that is, the system only comprises two code elements of 1 and 0 on the whole. In the dual-tone FSK modulation sub-module, code elements correspond to sine wave combinations of two different frequencies, simultaneous transmission of energy and information is achieved, after the dual-tone FSK modulation sub-module receives a signal, RF-DC conversion of the signal is achieved through an integrated rectifier, and after a direct current signal supplying energy to a receiving end is obtained, information in the signal is obtained through incoherent demodulation. And modulation and demodulation of the information are completed. The modulation signal obtained by the invention has a peak-to-average