Target indicated angle of radar seeker biases off the target when the centroid jamming such as chaff cloud or corner reflector presents

which makes the missile miss the target.To address this problem

oblique projection is employed to suppress the centroid jamming in this paper

where oblique projection operator is constructed by utilizing the polarization parameters of the target and the jamming.Since the polarization parameters of the target and the jamming are difficult to be estimated accurately in reality

influences of the estimation errors of the polarization parameters of the target and the jamming on the output target signal and jamming after oblique projection are mainly analyzed.Analytic expressions of output signal errors of the target and the jamming are presented.Based on this

the output interference-to-signal ratio and angle measurement error after oblique projection are further derived.Theoretical derivation and simulation results both demonstrate that angle measurement error of radar seeker after oblique projection is unrelated to the estimation error of the polarization parameters of the target

and is related to the estimation error of the polarization parameters for the jamming.Oblique projection can suppress the jamming to some extent and is good for enhancing the angle measurement accuracy of radar seeker if the estimation errors of the polarization parameters of the jamming are within the range of minus ten degree to ten degree.