In allusion to jamming or flurry happened in strapdown inertial alignment, put forward a new anti-jamming arithmetic based on the multiscale product of wavelet coefficient.

• 针对车载捷联导航系统初始对准中的人为或阵风干扰等问题,提出了一种基于多尺度小波系数内积的干扰信号检测算法。