面向脉冲噪声环境的多径信道鲁棒估计方法

摘要

In the low-voltage power line communication(PLC),due to impulsive noise interference and the impact of multipath channel caused by impedance mismatch,when traditional channel estimation algorithms in additive white Gaussian noise environment are applied to PLC,the results are often poor,even meaningless.For impulsive noise in PLC,the Middleton Class A impulsive noise model is adopted.The impulsive noise parameters are estimated by the method based on higher order moments.According to the impulsive noise parameters obtained,robust channel estimation algorithms in impulsive noise environment are proposed.Through simulation,the algorithms proposed are reliable and flexible.%在低压电力线通信(power line communication,PLC)中,由于脉冲噪声的干扰和阻抗不匹配引起的多径信道的影响,传统的在加性高斯白噪声环境下的信道估计算法运用到电力线通信时,往往效果很差,甚至得到的结果毫无意义.针对电力线通信中的脉冲噪声,采用了Middleton Class A脉冲噪声模型.通过基于高阶矩的方法对脉冲噪声的参数进行估计.根据估计得到的脉冲噪声参数,提出了新颖的、在脉冲噪声环境中鲁棒的信道估计算法.通过仿真,验证了提出的算法是可靠的,并且具有一定的灵活性.