Interferometric inverse synthetic aperture radar (InISAR) hyperactivity target-oriented imaging and motion trail reconstruction method based on time frequency analysis
A technology of time-frequency analysis and motion trajectory, which is applied in the fields of radar imaging and signal processing, and can solve the problem of not being able to give information about the azimuth position of the target.
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[0062] The geometry of the system is as figure 1 As shown, the system adopts the mode of one transmission and three receptions, and the antenna T 1 Reflected chirp signal, antenna T 1 , T 2 and T 3 Receive target echo at the same time. During the imaging time, the target to the antenna T 1 distance from R 1 change to R 1 '. Three channels are recorded into three signals, and they are processed according to the following steps.
[0063] Step S1: Eliminate the clutter interference of the stationary target and obtain the signal t m Indicates the azimuth slow time;
[0064] Step S2: On the signal obtained in step S1 Do time-frequency analysis along different range gates to obtain signals
[0065] Step S3: Repeat steps S1 and S2 for the signals of the other two channels, and the three channels obtain signals respectively and
[0066] Step S4: registration interference: for a slow time t m,j (j∈1, 2, 3, ..., q, q represents the number of pulses), obtained from...
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