题目/Title：Design of spread spectrum based UHF RFID tag for location system

作者/Author：
                        Tian Ding,Chun Zhang,Zhongqiu Li,Wei Zhang,Hong Chen,Wen Jia

会议/Conference：EDSSC 2014

地点/Location：Chengdu, China

年份/Issue Date：2014.18-20 Jun.

页码/pages：pp. 1 - 2

摘要/Abstract：
Radio frequency identification (RFID) applications with large tag populations often require the fast identification of the tags present. This paper applies a spread-spectrum technique and adds some new functions based on 18000-6C protocol, so that a RFID tag can transmit the unique spreading code which can be configured by reader for code division multiple access (CDMA). Therefore, an UHF-RFID reader can receive the spreading codes from numbers of tags at the same time and gets the position of each tag by means of time difference of arrival (TDOA) simultaneously.