For the vehicle navigation, the integrated system consists of global positioning system( GPS) and inertial navigation system( INS), with extended kalman filter( EKF) as the fusing filter. Due to non- line- of- sight of GPS and error accumulation in INS, this paper proposed a novel method using ANN and wavelet transform in the navigation system. When GPS is working well, ANN is trained using the information provided by INS as input, and the corresponding errors as output. Wavelet transform is also used to mi...