Method of suppressing radio frequency interference of high-frequency ground wave radar

Abstract The present invention relates to the field of radar signal processing, and particularly to a method of suppressing radio frequency interference RFI of a high-frequency ground wave radar. Based on the existing signal processing methods for high-frequency ground wave radars, the present invention decomposes a received signal into multiple Intrinsic Mode Functions IMFs using the Empirical Mode Decomposition EMD method, detects RFI positions through standard deviation determination and slide window processing, determines the power spectrum and instantaneous frequency of sampling points at the RFI positions of all IMFs, and sets the amplitudes of the sampling points satisfying the requirements as zero. The application effect of the present invention in actual data processing is excellent: signals are kept intact while reducing noise, producing remarkable suppression effect, radar detection range is increased, and radar detection accuracy is improved.