应用射频技术的商场智能导购系统

设计的电子导购系统，包括电子标签的选择，嵌入式 Android 系统的选择，电子导购系统功能模块的组成。同时设计了客户端的两大功能模块，包括促销信息功能模块的设计，电子地图定位模块的设计。讨论了定位RFID 标签的布局，并利用 RSSI 来评估其接收的信号强度并计算出标签和读写器的距离，根据相邻的四个标签的坐标，采用极大似然估计方法获得智能购物车的位置，能够用于商场内精准的定位。

Intelligent Shopping Guide System Application of RF Technology

In this paper, an electronic shopping guide system is designed which includes electronic tag selection, embedded Android system selection, and electronic shopping guide system function module. Also the paper designs the client's two function modules, including commodity promotional information function module, electronic map positioning module. The use of RSSI assesses received signal strength and calculates the RFID label and reader distance, got intelligent shopping cart position by using the maximum likelihood estimation method according to the four adjacent coordinates of the tag.