How to simulate a radar device? #270

Hi @qiangdadi, thanks for asking! DiffeRT mainly provides physical-layer utilities, so you might need to implement a few things yourself if you want to model a complete radar system. If you have moving targets, and you want to have information about the Doppler effect with respect to those moving objects, you should be able to derive the resulting path coordinates with respect to the targets' positon. To do so, you could create some function add_moving_objects(positions: Array, mesh: TriangleMesh) -> TriangleMesh, where positions is an array of your targets' position, and another bigger function trace_paths(positions: Array, scene: TriangleScene) -> Paths that traces all the paths for a given input. Then, you can differentiate the path coordinates with respect to the targets' position: jax.grad(lambda pos: trace_paths(pos, scene).vertices)(positions).

Do you have an example problem you want to solve so I can better guide you and probably provide some actual code?