电力线载波通信中的频域分段重构算法

Frequency Domain Segmentation Reconstruction Algorithm in Power Line Carrier Communication

为降低电力线载波通信过程中电力线信道特性对通信质量的影响,文中对G3电力线载波通信标准的信号帧结构和物理层模型进行了研究,提出了适用于正交频分复用系统的频域分段重构编码及译码算法.在G3电力线载波通信系统传输模型中引入该算法,对频域中的信号分别进行分段和重构编码,在接收模块加载频域分段重构译码算法.结果表明:在高斯信道及实测的电力线信道中,G3电力线载波通信系统能保证通信的可靠性且降低噪声对通信过程的干扰;特别是在实测的电力线信道中,加载频域分段重构编码后的系统获得5dB的增益,其抗强噪声干扰的能力得到提升.

In order to reduce the influence of power line channel characteristics on the communication quality during power line carrier communication,this paper studies the signal frame structure and physical layer model of the G3 power line carrier communication standard,and then presents a frequency domain segmentation reconstruction coding and decoding algorithm for the orthogonal frequency division multiplexing system.The algorithm is introduced in the transmission model of the G3 power line carrier communication system,by which the signals in the frequency domain are separately segmented and reconstructed,and finally the segmentation reconstruction decoding algorithm in the frequency domain of the receiving module is loaded.The results show that in the Gaussian channel and the measured power line channel,the G3 power line carrier communication system can guarantee the reliability of communication and reduce the interference of noise in the communication process;Particularly,in the measured power line channel,the system loaded with the frequency domain segment reconstruction code has a gain of 5 dB.