The model of GPS signals is given in the multipath environment

and the multipath effects to tracking loop in GPS receiver are analyzed.A multipath mitigation method of GPS signals is proposed using equalization technology in tracking loop.In this method

fractionally spaced blind decision feedback equalization is applied.Meanwhile

because GPS signals are BPSK signals and the illegibility of C/A codes appears when C/A codes are modulated with navigation data

the coefficients of the equalization are updated with modified constant module algorithm.Simulation results show that the method can mitigate the multipath effects effectively and feasibility of the method is validated.