Abstract:

That stop and go (SAG) model of echo signal currently used in linear frequency modulation (LFM) pulse compression radar is inaccurate to hypersonic targets for overlooking the range variation within single pulse duration, which will cause the offset and broadening of mainlobe and increase sidelobe. A more realistic echo model-inner pulse motion (IPM) is presented. A comparison of pulse compression performance under the two models is made by theoretical analysis and experiment results.We found that the pulse compression gain has an increase of 3dB by using the IPM model compared to the SAG model.