Aiming at the IMF criterion in EMD method, the energy difference tracking method was proposed and used to define the IMF in the “sifting” processes according to the integrity and orthogonality of the IMFs.

Impact of data channel on tracking performance of pseudo-code tracking loop;

DS/SS navigational signal tracking performance in the multipath channel;

With respect to several newly proposed regenerative PN ranging codes,the mean-square timing error of the chip tracking loop is derived using linear analysis,and simulation and comparison of tracking performance is made for these codes.

The simulation research of its dynamic characteristics shows that the third-order Tracking differentiator has fine tracking ability and good tracking precision, it is applicable to high-speed tracking system.

The factors that affect the tracking ability of infrared imaging seeker during endgame were quantitatively studied through analysis of the model of parallel encounter of missile and target.