Abstract
We proposed a novel Viterbi-based algorithm using jiggling substates for joint data sequence detection, symbol boundary self-calibration, and signal frame synchronization for the EPC-Global Gen-2 system. The proposed algorithm first represents the data-encoded scheme as a trellis diagram, and then, as a consequence; the data sequence estimation can be carried out through the Viterbi algorithm. Moreover, time duration of the symbol waveform is iteratively adjusted to generate two substates in the Viterbi algorithm so as to trace and calibrate the symbol boundary on the fly. Compared with conventional approaches, the proposed Viterbi-based algorithm can significantly improve the system performance in terms of data detection accuracy due to its full exploitation of the baseband signal structure combining with the developed substate technique.
Highlights
Radio frequency identification (RFID) technology has become popular as an effective, low-cost solution for tagging and wireless identification
In addition to significantly improving the accuracy of data detection, the proposed jiggle-Viterbi with substate selection (JVSS) algorithm can effectively perform signal frame synchronization because it fully exploits the structure of the baseband signals of RFID systems
Without handling the accumulated symbol period bias (ASPB) or the waveform distortion induced by the wireless channel, both the matched filter and the edge detector are not applicable to advanced RFID systems transmitting a large amount of information at a high data rate
Summary
Radio frequency identification (RFID) technology has become popular as an effective, low-cost solution for tagging and wireless identification. In addition to significantly improving the accuracy of data detection, the proposed JVSS algorithm can effectively perform signal frame synchronization because it fully exploits the structure of the baseband signals of RFID systems.
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