【摘要】 电力网络中,由于电力线的噪声和干扰对电力线的污染很大,严重影响了电力通信的质量。从理论角度阐述了电力网络的噪声分类及其特性,利用扩频载波理论对电力噪声的抑制进行了分析,并给出相应的公式,得出结论:扩频通信系统对于扩频频谱内的谐波干扰和基带频谱内的噪声有较强的抑制能力,对频谱无限宽的噪声则无明显的抑制作用,但可通过辅之适当的数字信号处理方法,如傅里叶变换、小波变换等,使噪声和干扰的危害降到最低程度。更多还原

【Abstract】 In allusion to the severe impacts of power line noises and interference on the quality of power communication,the classification and characteristics of noises in a power grid are expounded theoretically. Based on the theory of spread spectrum carrier,power noise suppression is analyzed and corresponding formulas given. It is concluded that the spread spectrum communication system is powerful in suppressing harmonic interference within spread spectrum and noises within baseband frequency spectrum;as for noises with infinitely broad spectrum,the system is ineffective,but can minimize the hazard by the aid of proper digital signal processing methods such as Fourier transformation and wavelet transformation.更多还原