Study and Implementation of Reader for Dual Antenna RFID Tags
碩士 === 國立臺灣科技大學 === 電機工程系 === 100 === Multi-path fading degrades performance of an Radio Frequency Identification (RFID) system operating in the Ultra High Frequency (UHF) band. Consequently dual antenna RFID tag with antenna polarization diversity is proposed to mitigate this problem. This work use...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/75106459530774752809 |
| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 100 === Multi-path fading degrades performance of an Radio Frequency Identification (RFID) system operating in the Ultra High Frequency (UHF) band. Consequently dual antenna RFID tag with antenna polarization diversity is proposed to mitigate this problem. This work uses a Software Defined Radio platform to implement a corresponding reader for dual antenna RFID tags. In the forward (Reader to tag) link, a dual antenna RFID tag use selective combining technique to improve the performance. In the reverse (Tag to reader) link, the reader uses maximum ratio combining technique to combat multi-path fading.
We use Agilent N9010A EXA signal analyzer to measure tag backscatter power at the reader receiver end in a meeting room. We also analyze bit-error-rate to Signal-to-Interference and Noise Ratio (SINR) of the software-defined-radio-based Reader. Experimental results show that the bit-error-rate approaches 2% when SINR is no less than 4 dB. Due to the FPGA gate count limit, the data sampling rate is insufficient; hence the bit-error-rate performance does not increase beyond 4dB.
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