【摘要】 基于正交频分复用(OFDM)的概念,提出在宽带电力线通信(PLC)中应用前置编码改进常用编码 OFDM 的新技术;在分析常用编码 OFDM 技术应用于宽带电力线通信时存在的缺点的基础上,给出了具体的前置编码方案;还在实际低压电力载波通道模型上对这两种技术进行了宽带电力线通信模拟仿真实验,仿真结果表明,应用前置编码OFDM 技术可显著减小传输信号的误码率,并可简化基于常用编码 OFDM 技术的通信系统实现的复杂性。更多还原

【Abstract】 According to the concept of orthogonal frequency division multiplexing (OFDM) and on the basis of analyzing the existing defects caused by adopting the conventional codes OFDM to wide band power line communication (PLC), the authors proposed that in the wide band PLC the conventional coded OFDM should be replaced by precoded OFDM and gave a concrete precoding scheme. The wide band PLC communication using two above mentioned coding technologies are simulated by actual carrier channel model of low voltage PLC, the results show that the BER of transmitted signals can be significantly reduced by use of precoded OFDM technology and the complexity of implementing the communication system adopting conventional coded OFDM can be reduced.更多还原