中压配电网载波通信调制解调技术研究

摘要

针对配电网载波通信的特点,基于传输线理论,对中压电力线信道衰减特性进行了建模,通过计算结果与测量结果的对比验证了该模型的准确性.介绍了正交频分复用的基本原理及优点,分析了其实现过程.对OFDM在电力线信道上的传输特性进行了仿真,进一步研究了在恶劣的信道传输特性下OFDM抗多径衰落能力,为更充分地发挥OFDM在电力线载波通信中的优势提供了参考.%Reasonable modulation mode can effectively improve its capacity of resisting disturbance. According to the features of PLC, analyzed its attenuation characteristics and modeled it based on transmission line theory. Comparison of the calculation and measured results verifies the accuracy of the model. Introduced the fundamentals and advantages of OFDM and analyzed its realization process. Simulated the transmission characteristics of OFDM in the measured power line channel. Further studied its resistance to multipath fading ability in poor channel environment, providing reference for giving full play to the advantages of OFDM.