The Anti-collision Technology Of Mixed Signal Based On BSS In Singal Path And Multiple Paths RFID

As the rapid development of Radio Frequency Identification and Ultra Frequency IdentificationTechnology, we have being settled an incrementally higher qualification to the collision avoidingtechnology in the Radio Frequency Identification Technology, and in the course BSS is the focus ofresearch of Radio Frequency Identification Technology recently.In this paper we analyzed the signalmixing model of RFID, then drew the conclusion of statistical independence among the radiofrequency identification signals, the insensitivity of the range and polarity, and the insensitivity tothe arranging order requirements of the radio frequency identification signals.In synthesis, radiofrequency identification multi-label signals satisfy the requirements of the two indeterminations ofBlind Source Separation algorithmic, so independent component analyzing algorithmic could beused to deal with the mixed signals identified by the radio frequency.Based by this we set twoexperiments: The Blind Source Separation adapting to mixture of radio frequency identificationbaseband signals and The Blind Source Separation adapting to mixture of radio frequencyidentification modulating signals, then discussed the separation capability and observed that thesimulating coefficient approaches1unlimitedly, which means independent component analyzingalgorithmic could be made use of in the Blind Source Separation of Radio FrequencyIdentification.First, we settled the underdetermined blind source separation mathematics model ofsingle-way Radio Frequency Identification mixed signals, discussed the delaminating technologybased on EMD and wavelet packet, analyzed the distilling methods of independent sub-wavefunctions and the determining methods of the number of independent sub-wave functions, thendistilled the underdetermined blind source separation method of single-way mixed RFID signalsbased on independent sub-wave functions.Through imitating experiments we continue to analyzethe physical characteristics of mixed RFID signals, discussed the influence of the separation effectof the frequency difference, and compared the effect of underdetermined blind source separationbased on the two separation technologies of EMD and wavelet packet.The research result indicates that the collision avoiding technology of BSS used in thesingle-way and multi-way mixed RFID signals is an effective method, we can reduce the quantity ofantennas in the electron object identification system effectively, enhance the reliability of theimplement of RFID collision avoidance and reduce economical costs by the application ofunderdetermined blind source separation technology which is implemented in RFID.