远程控制精准化灌溉系统中自适应均衡技术仿真研究

Simulation of adaptive equalization technology on the remote control precision irrigation system

数字通信系统是远程控制农田节水灌溉系统实现远程控制和数据传输的主要途径,数字通信系统中多径衰落的无线信道环境通常会使接收信号受到严重的码间干扰,自适应均衡可以校正信道产生的畸变.本研究介绍了自适应均衡器的原理和结构,建立了基于MATLAB的系统仿真模型,对基于自适应最小均方误差(LMS)算法的自适应均衡器进行了仿真研究.结果表明:基于LMS算法的自适应均衡器除噪效果非常显著,且该算法算量小,易于工程实现,应用性强.

The digital communication system is a major means for realizing remote control and data transmission in the remote control agricultural water-saving irrigation system.The received signal is often corrupted badly by inter-symbol interference in the multipath fading wireless channel circumstance.The aberration can be emended by adaptive equalization technology.This paper introduced the principle and structure of the automatic adaptive equalizer,proposed the systematic simulation model based on MATLAB,and conducted simulation study with the automatic adaptive equalizer based on LMS algorithm.The results showed that the noise removing effects of adaptive equalizer based on LMS algorithm was significant,and this algorithm was easy to realize and had good application.