摘要
研究了SX1276进行RF传输特点、与微处理器的控制接口、RF接收滤波和发送放大等硬件电路的实现。微处理器通过开关控制天线与接收或者发送电路完成数据的传输。为了适应室内定位低功耗的要求,在空闲时,SX1276进入休眠状态,通过活动通道检测技术降低定位装置的电能消耗。根据接收信号强度的方法来测量参考点和目标的距离,利用三个参考点计算目标的空间坐标,实现对目标的准确定位。
The RF transceiver character of SX1276, the design of interface circuit between MCU and SX1276, the design of RF receiving filter and transmitting amplifier circuit are researched. The microprocessor transmits the data through the switch control antenna to the receiving or sending circuit. In order to meet the requirement of low-power, the SX1276 enters into sleeping mode when it is idle. The channel activity detection technology is used to reduce the positioning equipment power consumption. The distance between target and refer point is measured by the received signal strength. The coordinate of target is calculated by three reference points, and the exact positioning is achieved.
出处
《单片机与嵌入式系统应用》
2016年第10期57-61,共5页
Microcontrollers & Embedded Systems
基金
广东省重点科技专项(2013A011403001)
