2020/04/26 by Ferdi Kara, Kara, Ferdi, Hakan Kaya +1
Engineering · #Advanced Wireless Communication Technologies #FOS: Computer and information sciences #FOS: Electrical engineering #Information Theory (cs.IT) #Optical Wireless Communication Technologies #Satellite Communication Systems #Signal Processing (eess.SP) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2004.12402
openalex publication_date 2020/04/26 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
Non-orthogonal multiple access (NOMA) is very promising for future wireless\nsystems thanks to its spectral efficiency. In NOMA schemes, the effect of\nimperfect successive interference canceler (SIC) has dominant effect on the\nerror performances. In addition to this imperfect SIC effect, the error\nperformance will get worse with the channel estimation errors just as in all\nwireless communications systems. However, all literature has been devoted to\nanalyze error performance of NOMA systems with the perfect channel state\ninformation (CSI) at the receivers which is very strict/unreasonable\nassumption. In this paper, we analyze error performance of NOMA systems with\nimperfect SIC and channel estimation errors, much more practical scenario. We\nderive exact bit error probabilities (BEPs) in closed-forms. All theoretical\nanalysis is validated via computer simulations. Then, we discuss optimum power\nallocation for user fairness in terms of error performance of users and propose\na novel power allocation scheme which achieves maximum user fairness.\n