OFDM调制技术在低压电力线的自适应控制  

Adaptive Control of OFDM Modulation Technology in Low Voltage Power Line

作　　者：郭荣祥[1] 邢彪[1] 

机构地区：[1]内蒙古科技大学信息工程学院,内蒙古包头014010

出　　处：《通信电源技术》2013年第4期61-63,78,共4页Telecom Power Technology

摘　　要：通过改进传统LMS算法,提出了一种模糊推理的变步长自适应算法。该算法结合模糊推理对LMS算法的步长增益进行了改进,通过模糊推理把输入变量映射为合适的步长增益,从而提高了对信道估计值的精度。通过误差绝对值与均方误差值的比较,表明该算法所测得的信道值比传统的LMS算法信道值更接近真实值,说明该算法具有良好的估计性能。Through the improvement of traditional LMS algorithm, the paper presents a fuzzy reasoning variable step size adaptive algorithm, this algorithm combines the fuzzy reasoning to improve LMS algorithm step length gain, through the fuzzy reasoning the input variable mapping for the right step length gain, so as to improve the accuracy of the channel estimation. Through the error absolute value and mean square error value comparison show that the algorithm is measured channel value than traditional LMS algorithm is more close to the real value of channel value, it is shown that the algorithm has good estimation performance.

关 键 词：低压电力线 正交频分复用 自适应LMS算法 信道估计 

分 类 号：TN919.3[电子电信—通信与信息系统]