Spurious peaks

extracting loss and doppler-coupling shift usually effect the application of the linearly modulated stepped frequency (LMSF) greatly.The mechanism of the still and moving spurious emergence in traditional target extracting algorithm is analyzed in the paper

which also presents the conditions for avoiding the appearance of the two kinds of spurious peaks.In order to lower the extracting loss

the paper describes a shift-extracting algorithm

which based on searching the maximum norm 1 of the range profile extracted by different shift quantity to fix on the optimum shift quantity

and then the final range profile can be obtained with the optimum shift quantity.Accordingly the moving spurious and extracting loss can be avoided

at the same time the doppler-coupling shift of the range profile is corrected.Moreover the paper analyses the application condition of this searching algorithm

and gives the design method for system parameters.The simulations on the point target and extended target testify the feasibility of the algorithm.