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文中设计了以CC2431无线定位引擎为核心、结合ZigBee参考节点的无线定位系统。实现了ZigBee节点(CC2430/CC2431)的硬件平台,尽可能降低硬件成本和减小设备体积。该系统采用数字RSSI技术,根据接收信号强度和已知参考节点位置准确计算出待测节点的位置,可实现3～5m定位精度和0.25m的分辨率。提出的定位系统满足了低成本、低功耗、高精度的设计要求。
In this paper, a wireless positioning system based on CC2431 wireless positioning engine and ZigBee reference node is designed. Realizes the hardware platform of ZigBee node (CC2430 / CC2431), reduces the hardware cost as far as possible and reduces the apparatus volume. The system uses digital RSSI technology, according to the received signal strength and known reference node location accurately calculate the location of the node to be measured, can achieve 3 ~ 5m positioning accuracy and resolution of 0.25m. The proposed positioning system to meet the low-cost, low-power, high-precision design requirements.