Feature to simulate Reconfigurable Intelligent Surface in Sionna

[manideepabc]

Description

I have developed this code as a part of my research work. This pull request adds a new class called RIS to simulate the effect of a reconfigurable intelligent surface on the wireless channel. It also adds a new function to channel/utils.py for calculating MIMO wireless channel capacity.

• Fixes a bug?

No

• Adds a new feature?

This new feature allows us to place an RIS in the environment in addition to Transmitters and Receivers and find out how the wireless channel from a Transmitter to Receiver is impacted by the presence of RIS. A unit test called test_ris.py is created. An example notebook called Sionna_Ray_Tracing_RIS.ipynb is added to show how the RIS class can be used and how the wireless channel is affected because of an RIS.

• Introduces API changes?

No

• Other contributions

No

Checklist

• Detailed description
• Added references to issues and discussions
• Added / modified documentation as needed
• Added / modified unit tests as needed
• Passes all tests
• Lint the code
• Performed a self review
• Ensure you Signed-off the commits. Required to accept contributions!
• Co-authored with someone? Add Co-authored-by: user@domain and ensure they signed off their commits too.