本文件定义了如何使用基于反向散射技术的ISO/IEC 18000系列RFID空中接口标准来定位RFID标签，特别是符合ISO/IEC 18000-4、ISO/IEC 18000-61、ISO/IEC 18000-62、ISO/IEC 18000-63和ISO/IEC 18000-64的标签。 本文件规定了本地化的物理和逻辑要求。该系统包括询问器（也称为读卡器）和标签（也称为标签）。询问器通过向标签发送调制的射频信号来接收来自标签的信息，标签通过调制其天线的反射系数来响应，从而向询问器反向散射信息信号。用于数据交换的调制射频信号基于ISO/IEC 18000系列的相关部分，此外，还有一个用于定位的具有相同或不同载波频率的叠加调制射频信号。 本文件描述了定位所需的信号、从询问器接收到的信号中获取定位信息的方法，以及对标签和询问器的要求。

This document defines how to use the RFID air interface standards of the ISO/IEC 18000 series that are based on backscatter technology for localization of RFID tags, specifically tags which are ISO/IEC 18000 4, ISO/IEC 18000 61, ISO/IEC 18000-62, ISO/IEC 18000-63 and ISO/IEC 18000-64 compliant. This document specifies the physical and logical requirements for localization. The system comprises interrogators, also known as readers, and tags, also known as labels. An interrogator receives information from a tag by transmitting a modulated RF signal to the tag and the tag responds by modulating the reflection coefficient of its antenna, thereby backscattering an information signal to the interrogator. The modulated RF signal for data exchange is based on the relevant part of the ISO/IEC 18000 series and, in addition, there is a superimposed modulated RF signal with the same or different carrier frequency intended for localization. This document describes the signals required for localization, the method to derive localization information from the signals received by the interrogator and the requirements onto tags and interrogators.