# Welcome!
# Differentiable Ray Tracing
RT has received an increased interest in the recent year the from the radio propagation community.
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We are often interested on computing the received power as a function of the position.
Placing 'camera' on top X-Y view. This gives us a very nice overview of what for call the 'coverage map'.
Moving RX positiong to find the best position
Moving TX positiong to find the best position
Knowing the derivative would be useful...
Maybe one of the most recent and popular work on DRT applied to radio-propagation is Sionna.
Using auto-diff, they have created an easy to use radio-network optimization tool.
RT's implementation presents many challenges, mainly the exponential number of paths we can test.
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