CAJ | 학술논문

在射频识别过程中,由于多个标签同时响应阅读器的查询命令,容易发生标签碰撞,从而影响了RFID系统的识别性能.针对标签数增多时,欠定盲分离算法出现系统性能急速下降等问题,本文提出一种基于约束性非负矩阵分解(NMF)与动态帧时隙(DFSA)相结合的并行防碰撞算法.通过动态调整时隙的长度,可以使每一时隙内的标签数目控制在较好的范围内,从而使RFID系统性能保持在较好状态,在需要快速识别大量标签的领域具有较好的应用价值.
재사빈식별과정중,유우다개표첨동시향응열독기적사순명령,용역발생표첨팽당,종이영향료RFID계통적식별성능.침대표첨수증다시,흠정맹분리산법출현계통성능급속하강등문제,본문제출일충기우약속성비부구진분해(NMF)여동태정시극(DFSA)상결합적병행방팽당산법.통과동태조정시극적장도,가이사매일시극내적표첨수목공제재교호적범위내,종이사RFID계통성능보지재교호상태,재수요쾌속식별대량표첨적영역구유교호적응용개치.
Tag collision may occur in the processing of identification when more than one tag responds the reader inquiry command at the same time,which affects the performance of the RFID system.And the algorithm of under-determined blind separation''s result becomes worse while the number of tags increases.Aiming at these problems,the paper puts forward a novel parallelizable identification anti-collision algorithm based on NMF and Dynamic Frame-Slotted Aloha algorithm.The number of tags in each group can be controlled within the optimum range by selecting a reasonable number of groups,which remains the good condition of the separation of the source signals and the throughput in RFID systems.The algorithm has a very good application value in the field where needs identification of large amount of tags.