| 摘要 |
<p>A method, terminal and system for radio frequency (RF) communication are provided by the present invention. The frequency difference between the transmit frequency and the receive frequency used by an RF card reader is one sub carrier frequency, by utilizing the frequency difference, the information of a second RF signal sent by an RF communication terminal is obtained with the change of parameters (such as the current, or the voltage, etc. ) generated in the coil of the RF card reader, and the normal communication and information interaction between the RF communication terminal and the RF card reader are ensured without adding any additional receiving circuit in the RF card reader. The costs of manufacture and use are less and the degree satisfaction of user experience is better in comparison with the prior art.</p> |
