基于相位误差校正的UHF RFID一维定位研究

s a key technology of Internet of Things (IoT), radio frequency identification (RFID) technology is widely used in object identification and tracking. In some manufacturing applications, such as the assembly line, the localization of the specific product is very important for the customized production. In recent years, although localization technology based on UHF RFID has gained great attention and development, the accuracy of the existing systems still can not meet the demand of different production applications. To improve the performance of the UHF RFID localization system, this paper proposes a method for one dimension localization based on the phase correction. Moreover, the characteristics of the phase of backscattered tag signal are analyzed to verify the invariant effect of a constant environment. Through experimental results of localization models of AOA and the phase of single antenna on a motorized stage, the average RSME of the model of the phase of single antenna can reach 0.006m (1m) and 0.008m (1.5m) after the error correction, which demonstrates that the performance of using the phase reflected by the passive UHF RFID tags and error correction to locate on the assembly line can meet the demand of the practical application.