Announcing Sionna v0.15

[faycalaa]

Features

Ray Tracing

• Add support for scattering:
  • Paths: Only for the last interaction, i.e., transmitter -> N >= 0 reflections -> 1 scattering -> receiver
  • Coverage map: Support for paths with arbitrary number of reflections and scattering interactions, in arbitrary order
  • Enrich radio materials with scattering coefficients that control the power distribution between scattered and reflected rays
  • Add support for Lambertian, directive, and backscattering patterns
  • (Paths only) Randomly remove some scattered paths controlled by the scat_keep_prob parameter to avoid an overwhelming number of paths
• Add support for first-order diffraction, i.e., transmitter -> wedge -> receiver (paths and coverage map)
• (Breaking change) Replace uniform random sampling of initial ray directions with a Fibonacci lattice
  • Remove seed parameter of Scene.compute_paths() and Scene.coverage_map()
• (Breaking change) New definition of the coverage map
• (Breaking change) Scene.compute_paths() now returns paths coefficients instead of transition matrices
  • Remove Paths2CIR layer: Channel impulse responses can be obtained through the Paths.cir() method
  • Applying Doppler shift can now be done through the Paths.apply_doppler() method
• Add support for the 3GPP TR38901 polarization Model-1
• Add flags for enabling/disabling paths types in Scene.compute_paths(), Scene.coverage_map() and Paths.cir()
• Add flags for disabling check of the scene prior to computing paths of coverage maps
• New scenes:
  • simple_wedge: A wedge with a 90 degrees opening angle
  • simple_reflector: A metallic square
  • double_reflector: Two metallic squares
  • triple_reflector: Three metallic rectangles
  • box: A metallic box
• Fix (Coverage map bug when using custom center #128)

FEC

• Enhanced MCS support for TBConfig and LDPC5GEncoder (Unsupported mcs table 4 #146, Unsupported code rate > 11/12 #147)
• Add support for downlink in Polar5GEncoder and Polar5GDecoder (PR Add optional deinterleaving to PolarSCLDecoder so that 5G downstream signals can be decoded #84)
• Add feature to return CRC status in PolarSCLDecoder (Channel decoder should (optionally) return CRC status #134)
• Numerical improvements in PolarSCLDecoder

Channel models

• Add discrete channel models:

  • BinaryMemorylessChannel
  • BinarySymmetricChannel
  • BinaryErasureChannel
  • BinaryZChannel

• Fix (Problem with polarization direction #115)

Tutorials

• Add dedicated section for ray tracing tutorials
• Add tutorials on diffraction and scattering
• Update the "Primer on Electromagnetics" with sections on diffraction and scattering

Other

• Switch the docker images from Jupyter to JupterLab

[ghost]

👍👍👍

[TwiggyDaniels]

Seems like some memory improvements with the ray tracing as well, don't know if it's from things you did or dependencies. Either way I can double the amount of rays and bounces in my experiment now!

The diffraction and scattering is also very nice.