The high-speed movement of target will cause the pulse envelop to move at different PRI,and the effi-ciency of inter pulse coherent accumulation will be greatly reduced when the distance migration exceeded the band-width resolution.Especially when the seeker itself was in high-speed motion,its radial velocity of the seeker-target usually exceeded several Mach,so it is highly probably to encounter distance motion problem.By analyzing the in-fluence on MTD of distance migration,a technique for motion compensation was proposed using frequency domain pulse compression.Simulation results showed that the method proposed in this article can compensate for the cross distance by the high-speed motion of the seeker when the accurate velocity between the target and the seeker was unknown.
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