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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。
In the low voltage power line communication (PLC), due to the influence of multipath channel caused by the impulse noise interference and impedance mismatch, when the traditional channel estimation algorithm under additive white Gaussian noise is applied to power line communication, Often the result is poor and the result is meaningless. For the impulse noise in power line communication, Middleton Class A impulse noise model is adopted. The parameters of impulse noise are estimated by a method based on higher order moments. Based on the estimated impulse noise parameters, a novel robust channel estimation algorithm in impulsive noise environment is proposed. Simulation shows that the proposed algorithm is reliable and has some flexibility.