Research Article
EXIT Analysis for 5G NR Demapper and Further Enhancements
@INPROCEEDINGS{10.4108/eai.11-7-2019.2297534, author={Fadli Afandi Putra and Khoirul Anwar and Levy Olivia Nur}, title={EXIT Analysis for 5G NR Demapper and Further Enhancements}, proceedings={Proceedings of the 1st International Conference on Islam, Science and Technology, ICONISTECH 2019, 11-12 July 2019, Bandung, Indonesia.}, publisher={EAI}, proceedings_a={ICONISTECH}, year={2021}, month={1}, keywords={5g new radio iterative demapping non-gray modulation and exit chart}, doi={10.4108/eai.11-7-2019.2297534} }- Fadli Afandi Putra
Khoirul Anwar
Levy Olivia Nur
Year: 2021
EXIT Analysis for 5G NR Demapper and Further Enhancements
ICONISTECH
EAI
DOI: 10.4108/eai.11-7-2019.2297534
Abstract
The fifth telecommunication generation (5G) New Radio (NR) demands excellent modulation to enhance spectral efficiency, where symbol-to-bit mapping rule in constellation diagram must be seriously considered. 5G NR uses Gray modulation that requires high performance coding, where computational complexity is usually high. This Paper proposes new 5G NR non-Gray modulation having capability of iterative decoding such that simple decoding can be applied. The iterations between demapper and decoder are utilized to update Log Likelihood Ratio (LLR) value of each transmitted bit to minimize error, where non-Gray modulation has better performance compared to Gray modulation. We propose new non-Gray modulation using Extrinsic Information Transfer (EXIT) chart to design matching between modulation and coding. We evaluate them using a series of computer simulations and design a mapper that matches the simplest decoding scheme, i.e., repetition codes. The results are expected to be better than the original 5G NR modulations.