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Optimization of Modulation and Coding Schemes for 11n and 11ac Networks

This proposal presents a detailed analysis of coding and modulation levels in wireless networks, particularly focusing on SNR versus mutual information calculations. It includes simulation results comparing Packet Error Rate (PER) against SNR, with an emphasis on 256 QAM modulation at rates of 3/4 and 5/6. The paper outlines proposed MCS settings and discusses the implications for network performance. Furthermore, a straw poll regarding enhancements to the specification framework is included, seeking consensus on proposed modulation and coding levels.

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Optimization of Modulation and Coding Schemes for 11n and 11ac Networks

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  1. Single User MCS Proposal Date: 2010-05-16 Authors: Slide 1 Vinko Erceg et al.

  2. Outline • Coding and modulation levels using SNR vs. mutual information calculation • PER vs. SNR simulation results • Proposed MCS • Straw poll Vinko Erceg et al.

  3. 11n MCS + 256 QAM (R=3/4 and 5/6) • MI vs. SNR for different modulation/coding levels • Modulation bits = [ 1 2 2 4 4 6 6 6 8 8 ] • Rate = [1/2 1/2 3/4 1/2 3/4 2/3 3/4 5/6 3/4 5/6 ] Vinko Erceg et al.

  4. Simulation Parameters • Channel Model D • 80 MHz Bandwidth • 26 columns in row column interleaver • Spatial stream frequency rotation with NROT = 58 • BCC encoding with single encoder • MMSE receiver • 1x1 – 4x4 antenna configurations • Number of spatial streams equals number of antennas • 40 ppm center frequency offset • Phase noise at -41 dBc • Uncorrelated at TX • Correlated at RX • 1000 packets per SNR point Vinko Erceg et al.

  5. 256 QAM Code Rate Comparison Nss=1 Vinko Erceg et al.

  6. 256 QAM Code Rate Comparison Nss=2 Vinko Erceg et al.

  7. 256 QAM Code Rate Comparison Nss=3 Vinko Erceg et al.

  8. 256 QAM Code Rate Comparison Nss=4 Vinko Erceg et al.

  9. Proposed .11ac MCS (0-9) Vinko Erceg et al.

  10. Straw Poll Vinko Erceg et al.

  11. Straw Poll #1 • Do you support adding the following item into the specification framework document, 11-09/0992? • R3.3.F: The draft specification shall include SU MCS set consisting of modulation and coding levels as defined in Table on slide 9. • Yes: • No: • Abs: Vinko Erceg et al.

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