A modified dynamic binary search anticollision algorithm

In RFID techniques, the dynamic binary algorithm is often applied to anticollision when there are multiple cards in the effective range of antenna. The quantity of anticollision instructions is usually large even if most of the card serial numbers are consecutive, and the reading speed of the reader will slow down. This paper issues a modified algorithm which could accelerate the reading operation of readers. By this algorithm, anticollision instruction will not be sent from readers while the collision happens at the first bit, and the serial numbers of both cards in collision will be obtained directly. Thus the speed of reading operation will be increased greatly.