| MS Seminar

Name of the Speaker: Mr. Vivek Kumar Singh (EE16S049)
Guide: Dr. Arun Pachai Kannu
Venue: ESB-244 (Seminar Hall)
Date/Time: 12th June 2025(Thursday), 4:00 PM
Title: Union of Linear and Non-Linear Codes for NOMA.

Abstract :

This thesis investigates the performance of Non-Orthogonal Multiple Access (NOMA) for next-generation wireless communication systems, enabling two users to share frequency resources through signal superposition at different power levels, thereby enhancing spectral efficiency. We propose a union of linear and non-linear codes, combining linear polar codes—known for their capacity-achieving properties and adoption in 5G standards—with non-linear Sparse Vector Codes (SVC), which leverage sparsity for robust decoding at low signal-to-noise ratios. The performance is evaluated in an Additive White Gaussian Noise (AWGN) channel, focusing on block error rate (BLER) metrics. Key parameters include sparsity level, relative power allocation factor (representing User 2’s power with respect to User 1), and block length. Notably, when the relative power difference between the two users is small, polar-polar NOMA fails to perform effectively. However, even in such scenarios, polar-SVC NOMA demonstrates robust performance. These findings highlight the benefits of integrating polar codes and SVC within a NOMA framework, offering insights for optimizing reliability and efficiency across diverse communication environments.