Mobile payment system based on radio frequency identification (RFID)

Abstract

A mobile payment system based on RFID provided by the present invention detects the distance change among objects by comparing the difference among the signal intensity of different frequencies when a first RFID induction electrode and a second RFID induction electrode work, and controls the power of an emission signal and adjusts the sensitivity of a reception signal by employing a double-channel radio frequency front end and by a signal regulator, searches a current optimum communication distance by a binary search method, and realizes the adaptive communication distance adjustment, so that the mobile payment system based on RFID can work under the best work mode in different environments, is more energy-saving, and is convenient for users to use.

Description

technical field [0001] The invention relates to an RFID-based mobile payment system, in particular to a mobile payment system capable of detecting and adjusting payment distance. Background technique [0002] RFID (radio frequency identification: radio frequency identification) is a non-contact automatic identification technology, which automatically identifies the target object and obtains relevant data through radio frequency signals. It does not have the advantages of waterproof, antimagnetic, high temperature resistance, long service life, large reading distance, data on the label can be encrypted, storage data capacity is larger, and storage information can be changed freely. Its application will bring revolution to retail, logistics and other industries. Sexual changes. [0003] The most basic RFID system consists of three parts: a tag (Tag), which is composed of a coupling element and a chip, each tag has a unique electronic code, and is attached to an object to iden...

AI Technical Summary

Problems solved by technology

[0013] Although the above two solutions have realized the non-contact financial payment solution, the core problem to be solved in the non-contact communication is the distance control of RFID. Generally speaking, these devices require the sensing device to have a continuous energy source for Detects changes in the distance between objects, but this increases the cost of the device

In addition, some devices require the sensing device to be connected to a comparator circuit to detect the degree of deviation from the reference voltage. This requirement greatly increases the cost of the device, and, in different application environments, what we need The communication distance is also different. Usually, the farther the maximum communication distance is required, the better. This will inevitably require the sending device to have a larger transmission power. However, in the case of a short distance, if the data is still sent with a higher power Because of increasing the power consumption of wireless communication equipment, this is unacceptable in areas with high power requirements such as handheld devices

Images