An Anti-collision Algorithm Based on Smart Antenna in RFID System
In Radio Frequency Identification (RFID) system,one of the problems we must solve is the collision between tags which lowers the efficiency of RFID system. Now,most of the popular anti-collision algorithms are based on Time Division Multiple Access (TDMA) and the space distributing characteristic of tags is not considered.In This paper,a novel algorithm based on smart antenna is proposed. Fast Fourier Transform (FFT) algorithm is adopted to produce fixed equally spaced beams which divide the reader field into several subspaces. TagsIndifferent sub-spaces can be distributedInthe same time slot and frequency.This algorithm is fully compatible with other anti-collision algorithms and can be combined with them according to the specific application circumstances. The experiment results show that this algorithm is viable and costeffective that an improvement of nearly 50 percent can be achieved.
Jiexiao Yu Kai Hua Liu Xiangdong Huang Ge Yan
School of Electronics and Information Engineering,Tianjin University,Yianjin,300072,China
国际会议
2008 International Conference on Microwave and Millimeter Wave Technology(2008国际微波毫米波技术会议)
南京
英文
1149-1152
2008-04-21（万方平台首次上网日期，不代表论文的发表时间）