关键词: 窄带干扰, IIR滤波器, 高斯-牛顿算法, 最佳收敛因子

Abstract:

In GNSS service process,the power of the satellite navigation signal received on the ground is very small and easily affected by surrounding complex electromagnetic interference,which can lead to failure in satellite positioning.e.A new adaptive all-pass notch filter based on the Gauss-Newton algorithm by which the frequency points are trapped by tracking narrow-band interference frequency points is introduced for the common narrowband interference.This algorithm is improved by using the best convergence factor in each iteration to reduce the mean square error.This improved algorithm enjoys a faster convergence speed and higher estimation precision.The simulation results show that the IIR filter can effectively remove up to 70 dB narrow-band interference.

Key words: narrowband interference;IIR filter;Gauss Newton algorithm;the optimal convergence factor