Doppler radar echo signal processing method based on VSS-LMS
摘要
In order to solve the problem that Doppler radar echo signal to noise ratio is low in complex electromagnetic environment, a VSS-LMS adaptive noise cancellation method based on improved tongue⁃like curve is proposed. By adding feedback to the original step iteration formula and filter weight coefficient iteration, the overall anti-interference performance of the algorithm is improved, and the compensation is added to the step iteration to speed up the initial iteration of the algorithm. The simulation results show that the proposed algorithm can effectively restore the target signal in the noisy signal with the minimum mean square error of 0.004 5, the maximum correlation coefficient of 0.95 and the maximum output SNR of 10.60 dB under the SNR of 0 to -10 dB. The measured results show that the proposed method has outstanding performance in the noise reduction of radar echo signal, and the mean square error is at least 0.005 5, which is suitable and effective in the actual noise reduction of electromagnetic signal.