Abstract: In order to solve the problem that the depth of the adaptive anti-jamming algorithm becomes
shallow after the null-pit broadening under high dynamic conditions，a null-pit broadening and deepening
algorithm is proposed，in which the disturbance obeys the Gauss statistical distribution． The algorithm
preprocesses the data by projection transformation，extracts the interference components from the sampled
signal，enhances the interference components by weighting the coefficients，constructs a new covariance
matrix on the basis of the null-pitch broadening algorithm，and finally uses the power inversion algorithm to
suppress the interference to achieve the purpose of null-pitch broadening and deepening． The simulation
results show that under high dynamic conditions，the depth of the proposed algorithm is increased on the
basis of the null broadening algorithm，and the robustness of the null broadening anti-jamming algorithm is
improved．

Key words: high dynamic, global satellite navigation system ( GNSS) , anti-jamming, nulling widening and
deepening