2020/11/18 by Ibrahim Al-Nahhal, Octavia A. Dobre, Al-Nahhal, Ibrahim +3
Engineering · #Advanced Wireless Communication Technologies #Emerging Technologies (cs.ET) #FOS: Computer and information sciences #Information Theory (cs.IT) #Optical Wireless Communication Technologies #Satellite Communication Systems
paper · pdf · doi:10.48550/arxiv.2011.09647
openalex publication_date 2020/11/18 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
Reconfigurable intelligent surface-empowered communication (RIS) and sparse\ncode multiple access (SCMA) are promising candidates for future generations of\nwireless networks. The former enhances the transmission environments, whereas\nthe latter provides a high spectral efficiency transmission. This letter\nproposes, for the first time, an RIS-assisted uplink SCMA (SCMA-RIS) scheme to\nimprove the conventional SCMA spectrum efficiency. The message passing\nalgorithm (MPA) is utilized and modified to decode the SCMA-RIS transmitted\nsignals. Moreover, a low-complexity decoder for the SCMA-RIS scheme is proposed\nto significantly reduce the MPA decoding complexity and improve the bit error\nrate performance of the conventional SCMA. Monte-Carlo simulations and\ncomplexity analysis are presented, which support the findings.\n