Design and Analysis of Protograph LDPC-Coded PD-NOMA Systems With Symmetric-Hamming Mapping
- 27 March 2026
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Communications Letters
- Vol. 30 (10897798) , 1538-1542
Abstract
This letter investigates the joint design of constellation mapping and protograph low-density parity-check (PLDPC) code for power-domain non-orthogonal multiple access (PD-NOMA) downlink systems. Specifically, we first propose a multi-priority design method to generate a type of symmetric-Hamming (SH) constellation mappings, and then verify their merits through a modified harmonic mean analysis. Furthermore, we construct a new type of non-punctured and punctured PLDPC codes by a mutual-information-guided threshold estimation to resist the inter-user interference. Simulation results demonstrate that the proposed designs achieve better performance than the existing benchmark schemes over Rayleigh fading channels.Keywords
Funding Information
- National Natural Science Foundation of China (62501173)
- National Natural Science Foundation of China (62322106)
- National Natural Science Foundation of China (62571142)
- Basic and Applied Basic Research Foundation of Guangdong Province (2022B1515020086)
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