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32FFT MIMO Interleaver

32FFT MIMO Interleaver. Authors:. Date: 2012-03-12. Slide 1. Authors continued:. Slide 2. Authors continued:. Slide 3. Outline. The value of Ncol used for one spatial stream in the 32FFT interleaver was accepted in contribution 11-12-0113-00-00ah-32FFT-Interleaver.pptx

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32FFT MIMO Interleaver

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  1. 32FFT MIMO Interleaver Authors: Date:2012-03-12 Ron Porat, Broadcom Slide 1

  2. Authors continued: Ron Porat, Broadcom Slide 2

  3. Authors continued: Ron Porat, Broadcom Slide 3

  4. Outline • The value of Ncol used for one spatial stream in the 32FFT interleaver was accepted in contribution 11-12-0113-00-00ah-32FFT-Interleaver.pptx • In this contribution we provide simulation results for determining the value of Nrotused for MIMO spatial multiplexing • Recall Nrot is a third frequency permutation applied on the second to fourth spatial streams Ron Porat, Broadcom Slide 4

  5. Simulation Assumptions • 5000 channel realizations • 256byte packet, ideal receiver, 2x2 with 2 spatial streams and 4x4 with 4 spatial streams configurations • Nrot=1:13 • Ncol=8 • 2 channel models • SCM Urban Micro, SCM Urban Macro Ron Porat, Broadcom Slide 5

  6. MCS3 • Aside from Nrot=3,6,9,12 all options are close Ron Porat, Broadcom Slide 6

  7. Cont. (4x4) • Most options are close Ron Porat, Broadcom Slide 7

  8. MCS5 • Aside from Nrot=3,6,9,12 all options are close Ron Porat, Broadcom Slide 8

  9. MCS7 • Gaps between good Nrot values and bad are larger in this case. • Nrot=2 best option Ron Porat, Broadcom Slide 9

  10. Conclusions • Several values possible, Nrot=2 is the best choice for the important case of MCS7 enabling spatial multiplexing at high SNR Ron Porat, Broadcom Slide 10

  11. Straw Poll • Do you support Nrot=2 as the 32FFT interleaverthird permutation choice? • Yes • No • ABS Ron Porat, Broadcom Slide 11

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