一种用于移动无线传感网的自适应变频抗干扰机制

Anti-interference Mechanism based on Self-adaptive Frequency Change in Mobile Wireless Sensor Network

针对特种车队对移动无线传感网的应用需求,设计了一种自适应变频抗干扰机制,以提升移动无线传感网的抗干扰能力。移动无线传感网设置了8个工作频点,根据网络规划选择其中一个频点作为网络当前工作频点,其他频点作为备用频点;在网络受到严重干扰时,该抗干扰机制启动备用频点底噪扫描程序,从中选出信道底噪最小的备用频点,并将网络切换到该备用频点上工作,以规避干扰。经试验验证,设计的自适应变频机制达到预期的抗干扰效果。

In accordance with the application requirements of mobile wireless sensor network for special motorcade, an anti-interference mechanism based on self-adaptive frequency change is designed to improve the anti-interference ability of mobile wireless sensor network. The mobile wireless sensor network has eight working frequency points. According to the network planning, the mobile wireless sensor network works at one of the frequency points, and the other frequency points serve as the backup options. When suffering severe electromagnetic interference, the mobile wireless sensor network starts a program to scan channel noise of spare frequency points, and choose the frequency point with minimum channel noise, and then changes its working frequency point to the frequency point with minimum channel noise, thus to avoid the electromagnetic interference.Experiments indicates that the design can satisfy the anti-interference requirements of the mobile wireless sensor network.