VEHICLE SPEED ESTIMATING APPARATUS

A vehicle speed estimating apparatus includes a vehicle information receiver configured to receive travel information of a vehicle including a wheel speed, a motor torque, and a longitudinal acceleration of the vehicle, a wheel slip determiner configured to determine whether wheel slip occurs, a longitudinal acceleration calibrator configured to calibrate the longitudinal acceleration received from the vehicle information receiver, and a vehicle speed estimator configured for estimating, depending on a determination result of the wheel slip determiner, a vehicle speed using the wheel speed or the calibrated longitudinal acceleration.