We propose a novel simulation approach of the Middleton Class-A model for impulsive noise generation considering symbol-wise transmission in a real Power Line Communication environment. Then, we validate the proposed approach for both single carrier binary FSK based—and multi-carrier OFDM-based communication systems. Established analytical formulations and obtained simulation results for the impulsive noise variance distribution and the communication system error probability show that in a binary FSK system, the second order of the noise variance per symbol, as well as the error floor, are closely related to the impulsive index A. The error floor decreases when A becomes large, and its asymptotic value is equal to the Bit Error Rate (BER) for an additive white Gaussian noise channel with noise variance equal to the average variance of the impulse noise. However, in an OFDM-based system, the noise variance per symbol at the output of the demodulator, as well as the error floor in the BER curves, are fixed and independent of the impulsive index A. The proposed analysis allows us to compare binary FSK and OFDM under the same theoretical noise conditions.

我们提出了一种基于Middleton A类模型的新型仿真方法，该模型考虑了在实际电力线通信环境中以符号方式传输的脉冲噪声生成。然后，我们针对基于单载波二进制FSK的通信系统和基于多载波OFDM的通信系统验证了所提出的方法。建立了脉冲噪声方差分布和通信系统误差概率的解析公式并获得了仿真结果，结果表明，在二元FSK系统中，每个符号的噪声方差的二阶以及误差底限与脉冲关系密切。指数一。当A时，错误底限减小变大，其渐近值等于加性白高斯噪声信道的误码率（BER），且其噪声方差等于脉冲噪声的平均方差。但是，在基于OFDM的系统中，解调器输出处每个符号的噪声方差以及BER曲线中的误差本底是固定的，并且与脉冲索引A无关。所提出的分析使我们能够在相同的理论噪声条件下比较二进制FSK和OFDM。