The invention discloses a multiclass
satellite navigation interference suppression method based on solution expanding technology. The method comprises the steps as follows: projecting the
signal received by the array antenna to the interference
orthogonal complement space for restraining the
blanket jamming, calculating the solution expanding weight vector matrix for the projected data, judging whether the matrix is full rank for identifying the deception jamming. If having deception jamming, calculating the solution expanding weight vector dependency, identifying the number of deception interference source, the deception interference source comprises fake
satellite signal and true
satellite signal. Using the solution expanding weight vector of the deception jamming for forming the rectangular projection matrix of the deception jamming, having the projection restraining deception jamming on signal, using the weight vector of true satellite for forming multi-wave beam and obtaining the
signal processing gain. The method can generate high
gain multi-wave beam with suppress interference, transmitted deception jamming and generated type deception jamming resisting capability, the multi-wave beam forming capability is not limited by the
array element, and there is no need to know the satellite signal and interference information.