CMDNet on Sionna (TensorFlow 2) Software

First release of the CMDNet implementation in Sionna Tensorflow 2. [With minor bugfixes and mentioning of corresponding PhD thesis in v1.0.1] The updated version of the original source code of: Edgar Beck, Concrete MAP Detection Network (CMDNet) Software, Zenodo, version v1.1.2, Feb. 2026. https://doi.org/10.5281/zenodo.8416507. Edgar Beck, Advancing Semantic and Digital Communications through Machine Learning, ser. Dissertations from the Department of Communications Engineering, University of Bremen. Düren: Shaker Verlag, Dec. 2025, vol. 15. https://doi.org/10.26092/elib/4791 Edgar Beck, Carsten Bockelmann, and Armin Dekorsy, "CMDNet: Learning a Probabilistic Relaxation of Discrete Variables for Soft Detection With Low Complexity," IEEE Trans. Commun., vol. 69, no. 12, pp. 8214–8227, Dec. 2021. https://doi.org/10.1109/TCOMM.2021.3114682