A Multi-frequency RFID Reader Based on Software Defined Radio

Abstract

The invention provides a multi-frequency RFID reader based on software radio. Due to lack of a uniform standard, the radio frequency recognition frequencies of all countries are not consistent, and in order to adapt to the requirements of different countries, a reader-writer is required to have an RFID product which has the requirement of recognizing multiple frequencies to serve for different countries or districts. The invention provides the multi-frequency RFID reader based on software radio. The multi-frequency RFID reader is formed by a radio frequency module, a baseband module and a power module, wherein the power module is respectively connected with the radio frequency module and the baseband module; the radio frequency module is used for realizing modulation and demodulation on a baseband signal and transmitting or receiving a modulated signal; the baseband module realizes control, encoding, decoding and inspection of the whole reader-writer, interaction of the reader-writer and an upper computer, and control on the radio frequency module; and the baseband module comprises an ARM processor system and a programmable logic, the ARM processor system is connected with the programmable logic and the programmable logic is connected with the radio frequency module.

Description

technical field [0001] The invention relates to a multi-frequency RFID reader based on software radio, in particular to an RFID reader-writer capable of identifying multiple frequency tags, which can be used for expressway management, logistics cargo identification and classification, valuables management, and anti-counterfeiting , Access control system, warehouse management, retail management, container transportation, postal services, etc. Background technique [0002] The RFID reader is also called "RFID reader", that is, radio frequency identification. It can automatically identify the target object and obtain relevant data through the radio frequency identification signal without manual intervention. It can identify high-speed moving objects and simultaneously identify multiple RFID tags. Operation fast and convenient. RFID readers are divided into four types of readers: low frequency, high frequency, ultra high frequency and microwave frequency band. [0003] At pres...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a multi-frequency RFID reader based on software radio that has a reasonable structural design, solves the problem of a single identification frequency, and can adapt to the needs of different countries

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