Performance Analysis of Code Domain NOMA Techniques and Power Domain NOMA

Abstract

OMA (Orthogonal Multiple Access) doesn’t meet the 5th Generation requirements, because its performance is not good when number of users are increases. Non Orthogonal Multiple Access (NOMA) improves spectral efficiency and user capacity without sacrificing system performance. The main contribution of this thesis is to evaluate performance analysis, based on BER curve of CD-NOMA and PD NOMA using different parameters. The chosen schemes for Code Domain NOMA are LDS-CDMA, LDS-OFDM and SCMA. Power Domain NOMA is implemented for two user model. CD NOMA schemes are compared with PD NOMA and there fair comparison is evaluated. All schemes are run in MATLAB under AWGN Channel. There system model, key performance parameters and achieved results are discussed. This thesis primarily discusses the importance and uniqueness of NOMA techniques. In Research Methodology Phase-2, SCMA scheme is discussed in detail. It provide fundamental for understanding of SCMA scheme under different conditions. This thesis aims to demonstrate SCMA scheme performance in terms of bit error rate using different codebooks and orthogonal resources. Using Non AWGN and AWGN channel different codebooks performance is evaluated. From results we achieved good results for Codebook2. We achieved better results for codebooks when orthogonal resources are equal to code words.