Title：Time difference measurement-based antenna switching type radio frequency positioning method
Country：China
Patent No.：201210369872.6
Legal Status：Authorized
Inventor：Chun Zhang, Qi Peng, Zuozhao Li, Zhihua Wang
Assignee：Tsinghua University
Address：Institute of Microelectronics,Tsinghua Univ. Beijing,10084
Filing Date：2012-09-27
Issue Date：2014-12-31
Abstract：
The invention discloses a time difference measurement-based antenna switching type radio frequency positioning method and belongs to the technical field of radio frequency positioning. The method is characterized by comprising the following steps of: distributing positioning antennae of an antenna group in space in which the position of a reader serves as a coordinate origin, and recording the coordinate information of each positioning antenna into a host; switching and accessing different positioning antennae through an antenna switching control unit, and measuring the time interval from the moment when the reader sends a signal to the moment when the reader receives the information which is returned by a label; processing the measured data through the host to acquire the time difference of transmitting electromagnetic waves in the space when different positioning antennae are accessed, and then acquire the distance difference when the label reaches corresponding two different antennae according to the time difference, and then setting up a plurality of hyperboloid equations; and performing iterative computation on a plurality of hyperboloid equations to acquire the position coordinate of the label.
Patent Certificate：
PDF/Jpg