一种适用于超高频RFID 系统的低复杂度防碰撞算法

为提高EPCglobal C1 Gen2射频识别系统的多标签识别性能，提出一种快速防碰撞算法。该算法仅在一帧中的某个监测点估计标签数量和调整帧长，分析研究了多个监测点，对不同监测点的性能进行比较以寻找最佳检测点，并利用Matlab2010软件，采用蒙特卡罗仿真方法对其进行仿真验证。仿真结果表明：在该算法下，系统吞吐率可以达到0.34，非常接近EPCglobal C1 Gen2防碰撞算法的理论最大值0.368。同现有算法相比，该方法能极大地降低计算复杂度，提高识别性能。

An Anti-collision Algorithm with Low Computation Complexity for UHF RFID System

A fast anti-collision algorithm has been proposed to improve the identification performance of the EPC C1 Gen2 standard. The algorithm estimates the tag quantity and adjusts the frame size at a check point of a frame for each identification round. The Monte Carlo simulation is carried out to verify the performance of the proposed algorithm by using MATLAB. Simulation results show that the system throughput of our method can reach a value of up to 34%, which is very close to the theoretical maximum of 36.1% for the EPC C1 Gen2 anti-collision scheme. As compared to existing methods, the algorithm significantly reduce the complexity and improve the performance.