Application of Three-Threshold FCME and Extended Interpolation Algorithm in Narrowband Interference Suppression

Existing FCME frequency domain narrowband interference suppression technology has insufficient suppression ability in high SNR environment. We propose a three-threshold FCME algorithm based on the double-threshold FCME algorithm. At the same time, we use the generalized continuation approximation algorithm to update the amplitude of the interference frequency. The continuation approximation algorithm can effectively reduce the distortion of time domain signals. We simulated this improved algorithm on MATLAB. The simulation results show that this optimization algorithm can improve the accuracy of interference frequency detection, improve the narrowband interference suppression capability, and reduce the receiving bit error rate.