精准农业 WSN 定位节点设计--基于数字频率合成器

摘要

In view of the shortcomings of poor anti-interference ability , high power consumption and low precision on wireless sensor network ( WSN) nodes in current precision agriculture , we designed a kind of precision agriculture WSN node based on digital frequency synthesizer .The WSN positioning node uses the digital frequency synthesizer to replace traditional analog frequency synthesizer .After testing , the design of WSN positioning nodes can reduce power consump-tion about 200mW, reduce the phase noise about 43 dB/Hz, and the positioning error is reduced to 1.59cm.The de-signed WSN localization node is particularly suitable for farmland , or other conditions which have requirements of anti-jamming capability , power consumption , and positioning accuracy in precision agriculture .%针对当前精准农业无线传感器网络（ WSN ）定位节点抗干扰能力差、功耗大以及精度低等缺点，设计了一种基于数字频率合成器的精准农业WSN定位节点。该节点采用数字频率合成器来替代传统 WSN 定位节点中的模拟式频率合成器。经测试发现，所设计WSN定位节点不仅能够将功耗降低约200 mW、相位噪声减少约43 dB/Hz ，而且定位误差减小至1．59 cm。所研究的WSN 定位节点特别适用于农田甚至大田条件下对抗干扰能力、功耗以及定位精度要求较高的精准农业领域。