Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Research Article A Baseband Signal Processing Scheme for Joint Data Frame Synchronization and Symbol Decoding for RFID Systems | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 724260 11 pages doi 2010 724260 Research Article A Baseband Signal Processing Scheme for Joint Data Frame Synchronization and Symbol Decoding for RFID Systems Yung-Yi Wang1 and Jiunn-Tsair Chen2 1 Department of Electrical Engineering Chang Gung University Taoyuan 33302 Taiwan 2R D Group Railink Technology Corporation 5F No. 36 Tai-Yuen Street Jhubei City HsinChu Hsien 302 Taiwan Correspondence should be addressed to Yung-Yi Wang yywang@ Received 25 January 2010 Revised 19 April 2010 Accepted 26 April 2010 Academic Editor Sangjin Hong Copyright 2010 . Wang and . Chen. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. We proposed a novel Viterbi-based algorithm using jiggling substates for joint data sequence detection symbol boundary selfcalibration 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. 1. Introduction Radio frequency identification RFID technology has become popular as an effective low-cost solution for tagging and wireless identification. As RFID technology becomes cheaper it is becoming increasingly prevalent in .
