disclosed is an apparatus and method for adaptive wireless channel estimation . once a packet is received , this invention analyzes channel interference index for a moving vehicle , and computes a first recursive parameter , a second recursive parameter and an interpolation number . based on the first recursive parameter and the interpolation number , partial channel information is calculated for further channel estimation by using an interpolation . the parameter of an equalizer is also immediately updated . cooperating with a decision feedback scheme and based on the second recursive parameter , channel tracking is performed . in order to achieve the adaptive channel estimation for wireless access on the time - variant vehicle environment , the parameter for the algorithm for performing the channel estimation is adjusted .