SCMA Codebook Design Based on a 16 Star-QAM with MED Maximization Afilal Meriem, Hatim Anas, Latif Adnane and Arioua Mounir ITM Web Conf., 48 (2022) 03003 Published online: 02 September 2022 DOI: 10.1051/itmconf/20224803003