基于功率谱收敛的低压电力载波信道中的噪声检测与建模

Power Spectrum Convergence Based Noise Model in Low Voltage Power Line Carrier Channel

在低压电力线载波信道中,复杂的噪声特性是阻碍低电压电力线载波通信广泛应用的主要原因之一,因此,准确的噪声模型对于设计和优化电力线通信系统具有重要意义;为了得到更加准确的噪声模型,给出一种等效背景噪声和功率谱收敛算法;通过对多组拟合参数的求解,并以归一化理论和噪声特性为基础,实现功率谱收敛算法对准确噪声模型的搭建;通过低压电力线信道噪声分析,得出功率谱收敛算法能够收敛,功率谱收敛值0.535%,表明噪声模型可以准确地反映实际噪声特性,验证了功率谱收敛算法在噪声模型中应用的可行性。

In the low voltage power line carrier channel,the main reason of hindering the Low voltage power line carrier communication is the complicated characteristics of noises.Hence,to propose an accurate noise model has great significance to the power line communication system＇ s designing and optimizing.In order to get a more accurate noise model,an equivalent background noise and algorithm of power spectrum convergence is put forward.Through the solution of multiple sets of fitting parameters,and the foundation of normalization theory and characteristics of noise,an accurate noise model is realized by the algorithm of power spectrum convergence.Data analysis shows that rate spectral convergence algorithm is proved right and Convergence value is 0.535％.The availability of the algorithm of power spectrum convergence in the application of noise model is verified through the noise analysis of low voltage power line channels.