Complex target simulation using phased.RadarTarget

Hi,

I am currently working with the Phased Array System Toolbox (ver 2.2)of MATLAB. The phased.RadarTarget feature helps to simulate 'point targets'. It is also possible to add time fluctuating models (Swerlings 1,2 etc) using this function. Is there anyway to simulate 'complex targets' such as a car, airplane etc using this toolbox, provided I have the RCS vs. Aspect angle values for these complex objects? Any information that would point me in the right direction would be helpful. Any other alternative ideas are also welcome.

Thanks you, Jenny

Answer 1

[Honglei Chen]

Currently there is no such functionality in Phased Array System Toolbox. However, you can try to build one if you have the data available. The equation for the reflected signal is shown in the documentation:

http://www.mathworks.com/help/phased/ug/radar-target.html

So what you can do is using interpolation to come up the desired RCS value based on the measurements and then apply the equation.

HTH and if you need more details, feel free to drop me a note.

[Rifat Afroz]

Hi,

I am trying to generate some artificial point target reflections for a synthetic aperture radar case. But I am not sure how to generate the range (R) values for a given set of range time(t_r) and azimuth time (t_a). Following is the equation (for the received echo) I am using:

rx = sigma * w(t_r - 2*R/c) .* w(t_a) .* exp(-1i * 4*pi*f0.* R/c) .* exp(1i * pi*gamma*(t_r - 2*R/c).^2)

Are there any equation for generating range values that will be consistent with the range and azimuth times?

Any related advice will be highly appreciated. Thanks.

[Honglei Chen]

You may want to take a look at this example

https://www.mathworks.com/help/phased/examples/stripmap-synthetic-aperture-radar-image-formation.html

HTH

[Rifat Afroz]

Many thanks Honglei.

Just a quick question: Is the SAR signal processing algorithm used in the example a simple version of range migration algorithm? I don't see it estimating any doppler centroid before azimuth focusing.But still the data are focused accurately.

[komal inayat]

Hi,

i am working on a frequency agile radar. How can i generate virtual targets so that i could do signal processing on receiving echos?