Full-duplex multi-carrier near-field communication method based on sound waves

The invention discloses a full-duplex multi-carrier near-field communication method based on sound waves. The method comprises the following steps: after encrypting original data at a sending end of near field communication, carrying out information source coding, carrying out channel coding, OFDM modulation and frequency rising, embedding an OFDM modulation signal subjected to frequency rising into a carrier audio, sending the OFDM modulation signal through a loudspeaker device, and covering noise while transmitting the data; a sound wave signal is received at a receiving end through a soundreceiving device, a data baseband signal is obtained after frequency reduction, a band-pass filter and OFDM demodulation, and finally original data are obtained through channel decoding and information source decoding. The real-time performance of near field communication is improved through the multi-carrier modulation and frequency division full duplex technology, the uniqueness of secret key generation is ensured by ad