A low-complexity method based on the second-order direct infinite impulse response (IIR) notch and its cascaded form for global navigation satellite systems (GNSSs) is proposed to mitigate the continuous wave interference (CWI) and narrowband interference (NI) as well as their mixed interference. The number of the cascaded stages is selected by the bandwidth of NI as well as that of the second-order direct IIR notch. The parameters of the second-order direct IIR notch and the bandwidth of NI are determined by the fast Fourier transform. To evaluate the performance of the proposed method, the authors conduct the simulation experiment and real-data experiment. In each experiment, the CWI scenario, the NI scenario and the mixed interference of CWI and NI scenarios are verified. The results of experiments depict the effectiveness of the introduced method.

中文翻译：

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减轻GNSS接收机连续波干扰和窄带干扰的通用方法

提出了一种基于二阶直接无限冲激响应（IIR）陷波及其级联形式的全球导航卫星系统（GNSS）的低复杂度方法，以减轻连续波干扰（CWI）和窄带干扰（NI）作为他们的混合干扰。级联级的数目由NI的带宽以及二阶直接IIR陷波的带宽选择。二阶直接IIR陷波的参数和NI的带宽由快速傅里叶变换确定。为了评估该方法的性能，作者进行了仿真实验和实数据实验。在每个实验中，都验证了CWI方案，NI方案以及CWI和NI方案的混合干扰。