The invention provides a polarization suppression
processing method for
radar mainlobe interference. The technical scheme is that: the method comprises the following five steps of: 1, constructing a function base relevant to a
radar antenna polarization characteristic; 2, preprocessing an interference and target mixed
signal; 3, performing orthogonal polarization
decomposition processing on the interference and target mixed
signal; 4, performing polarization filter vector
estimation on the interference and target mixed
signal; and 5, performing space domain multi-concave polarization filter on the interference and target mixed signal. A
voltage matrix of the interference and target mixed signal is processed by using a least square
algorithm, so that orthogonal polarization
decomposition and
estimation for the interference and target mixed signal are realized; and under the condition that a pitching angle cannot be acquired precisely, an interference signal is suppressed by using a space domain multi-concave virtual polarization filter. The polarization suppression
processing method has no extra requirement on a hardware
system, is easy to implement, and is high in
engineering applicability.