电力线宽带载波通信的干扰过滤技术

发布时间：2018-05-12 14:21

  本文选题：时频峰值 + 宽带载波　； 参考：《电网与清洁能源》2016年09期

【摘要】：电力线宽带载波间存在大量干扰信号,采用传统方法构建的干扰模型,只能在高信噪比的情况下完成通信过程中的干扰过滤,有效信号被淹没于干扰信号中,导致干扰效果差。提出一种基于改进时频峰值滤波算法的电力线宽带载波通信干扰过滤方法,利用频率调制将电力线宽带载波通信中的干扰信号编码成解析信号的瞬时频率,通过瞬时频率估计对干扰信号进行识别;采用时频峰值干扰过滤技术,对电力线宽带载波通信干扰信号中的原始信号进行恢复;在信号处理前,对时频峰值滤波算法进行改进,获取基本模式分量,依据干扰信号与有效信号的主导模态,利用不同窗长进行处理,将得到的电力线宽带载波通信信号应用于时频峰值滤波技术中,实现干扰过滤。实验结果表明,该方法干扰过滤效果好、过滤性能高、运行时间短,具有良好的实用性。
[Abstract]:There are a large number of interference signals between power line wideband carriers. The interference model constructed by the traditional method can only filter the interference in the communication process under the condition of high signal-to-noise ratio, and the effective signal is submerged in the interference signal, which results in poor jamming effect. A novel interference filtering method for power line wideband carrier communication based on improved time-frequency peak filtering algorithm is proposed. The interference signal in power line wideband carrier communication is encoded into the instantaneous frequency of analytic signal by frequency modulation. The interference signal is identified by instantaneous frequency estimation, the original signal of power line wideband carrier communication jamming signal is recovered by time-frequency peak interference filtering technology, and the time-frequency peak filter algorithm is improved before signal processing. The basic mode components are obtained and processed by using different window lengths according to the dominant modes of the interference signal and the effective signal. The power line wideband carrier communication signal is applied to the time-frequency peak filter technology to realize interference filtering. The experimental results show that this method has good interference and filtering effect, high filtration performance, short running time and good practicability.
【作者单位】： 国网河北省电力公司河北省张家口供电公司;
【基金】：教育部高校硕士点基金(201002240070)~~
【分类号】：TM73;TN913.6
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本文编号：1878952