Hierarchical Modulation for IEEE 802.11: Initial Results and Findings
Explore the analytical results and discussions on Hierarchical Modulation for IEEE 802.11 in March 2024. Discover insights on BER for SISO systems with uncoded Hierarchical Modulation using 16QAM and 64QAM. Gain an understanding of modulation parameters and robustness levels for different constellations.
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March 2024 doc.: IEEE 802.11-24/0457r0 Hierarchical Modulation for 802.11 initial results Date: 2024-03-XX Authors: Name Affiliations Address Phone email Vamadevan Namboodiri Samsung devan.n@samsung.com Eunsung Jeon Samsung eusnung.jeon@samsung.com Submission Slide 1 Vamadevan Namboodiri and Eunsung Jeon, Samsung
March 2024 doc.: IEEE 802.11-24/0457r0 Analytical Results, New findings and Discussions [3] gives expressions for BER for SISO, uncoded , Hierarchical Modulation systems. Next few slides provide BER plots for 16QAM and 64 QAM based on formulation in [3] These are not results from simulation, but from the analytical expressions given in the reference A few parameters are introduced in the next slide to understand/interpret those results. Submission Slide 2 Vamadevan Namboodiri and Eunsung Jeon, Samsung
March 2024 doc.: IEEE 802.11-24/0457r0 definitions (illustrations with 16 QAM constellation) When ?? = ??, we get uniform constellation 802.11 constellations are uniform Define the parameter R as, ?12 (? 4 1)?22 ? = ?12+ 3 M is the modulation order For uniform 16QAM constellation R= 0.8 64 QAM constellation R = 0.76 Increasing ?? can increase R Why? ? 2 ?1 = ?1 + 1 d2 For e.g., for 16QAM, If ?? = ?.? ??, R = 0.86 Submission Slide 3 Vamadevan Namboodiri and Eunsung Jeon, Samsung
March 2024 doc.: IEEE 802.11-24/0457r0 Non-uniform 16QAM (higher R) ?? ?? ?1 ?? ?? ? ?1 ?1 Submission Slide 4 Vamadevan Namboodiri and Eunsung Jeon, Samsung
March 2024 doc.: IEEE 802.11-24/0457r0 Non-uniform 64QAM (higher R) ?? ?? ?1 ?? ?? ? ?1 ?1 Submission Slide 5 Vamadevan Namboodiri and Eunsung Jeon, Samsung
March 2024 doc.: IEEE 802.11-24/0457r0 Uncoded BER vs SNR for uniform 16 QAM (channel AWGN ) HP & LP streams have different levels of robustness Submission Slide 6 Vamadevan Namboodiri and Eunsung Jeon, Samsung
March 2024 doc.: IEEE 802.11-24/0457r0 Uncoded BER vs SNR for uniform 64 QAM (channel AWGN ) HP & LP streams have different levels of robustness Submission Slide 7 Vamadevan Namboodiri and Eunsung Jeon, Samsung
March 2024 doc.: IEEE 802.11-24/0457r0 Results from [3] 256QAM Definitions LP bits are a.k.a Refinement bits HP Bits are a.k.a Base Bits Discussion As R increases HP robustness increases considerably whereas LP robustness degrades slightly. Uniform Constellation Submission Slide 8 Vamadevan Namboodiri and Eunsung Jeon, Samsung
March 2024 doc.: IEEE 802.11-24/0457r0 Current Observations Based on the current findings we propose HM with non-uniform constellations (increase R) Independently select the coding for HP and LP streams. The study is ongoing Submission Slide 9 Vamadevan Namboodiri and Eunsung Jeon, Samsung
March 2024 doc.: IEEE 802.11-24/0457r0 Reference [1] Hierarchical Modulation for 802.11 IEEE 802.11-24/0409r1 Submission Slide 10 Vamadevan Namboodiri and Eunsung Jeon, Samsung
