摘要
对于全球导航卫星系统(GNSS)接收机而言,窄带干扰十分常见并且危害较大。对此提出一种基于过采样离散傅里叶变换(DFT)滤波器组的频域窄带干扰抑制技术。与传统的基于加窗DFT处理的方法相比,这种方法能够更好地减小干扰信号频谱泄露问题;而与基于临界采样DFT滤波器组方法相比,这种方法能够更加有效地降低导航信号的畸变问题,特别适合在卫星导航接收机中应用。理论分析和仿真结果表明,基于过采样DFT滤波器组的新方法具有更强的窄带干扰抑制能力和更小的插入损耗。
In this paper, we have discussed the application of oversampled DFT filter bank to the suppression of narrowband interference in global navigation satellite system （GNSS） receivers. Traditionally, techniques of narrowband interference suppression in frequency domain generally use windowed DFT processing method, which exhibits poor approximation to the perfect reconstruction. In contrast, practical oversampled fiher-bank provides near perfect reconstruction and can effectively mitigate the spectral leakage problem. This interference suppression technology is applied in the GNSS receiver. Compared to the traditional method, the experiment results show that the oversampled DFT filter bank method has stronger interference suppression ability with smaller insertion loss.
出处
《电子技术应用》
北大核心
2011年第10期87-90,共4页
Application of Electronic Technique
