| 摘要 |
An acoustic wave payment method, comprising the steps of: generating, by an acoustic wave sending device (20), a transaction digital signal according to a transaction instruction, encrypting and modulating the transaction digital signal to generate a transaction signal, and playing the transaction signal; generating, by a POS terminal device (10), a random interference signal, and playing the interference signal through an audio sending unit (13); receiving, by the POS terminal device (10), a superimposed aliasing signal of the interference signal and the transaction signal played by the acoustic wave sending device (20) through an audio receiving unit (12), and then subtracting the product of the interference signal and an experience weighted value from the aliasing signal to obtain a transaction signal; and converting, by the POS terminal device (10), the transaction signal into a digital signal, and conducting decoding, decryption and demodulation signal processing on the digital signal to obtain transaction information corresponding to the transaction signal. Also disclosed are an acoustic wave payment system (100) and a POS terminal device (10) thereof. |
