Frequency modulation detection target echo simulation method based on fractal theory
A fractal theory and target echo technology, applied in the field of short-range detection, can solve the problems of not considering the terrain model and not being able to replace the measured data, etc., and achieve the effect of shortening the measurement cycle, saving manpower and financial resources, and the radar echo data is real
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[0053] The present embodiment adopts the following system parameters: triangular wave linear frequency modulation system, center frequency is F=1GHz, modulation cycle T m =0.32ms, frequency deviation △F=12.8MHz, projectile motion height 20m~2m, projectile falling angle 60°, vertical falling speed 300m / s, difference frequency sampling rate f s = 5GHz.
[0054] Such as figure 1 Shown, the present invention comprises the following steps:
[0055] (10) Generate a signal: generate a triangular wave linear frequency modulation signal according to the system parameters, and simulate its motion track according to the motion parameters of the projectile;
[0056] (20) Generate terrain data: adopt the midpoint displacement method in fractal theory to carry out three-dimensional terrain modeling to obtain terrain DEM data;
[0057] (30) Build the scattering unit model: through the equal Doppler ring-equidistance method, use the DEM data as the terrain data to set up the scattering uni...
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