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32FFT Interleaver

32FFT Interleaver. Authors:. Date: 2012-01-16. Slide 1. Authors continued:. Slide 2. Outline. 32FFT OFDM was accepted in contribution 1311 as the PHY used for 1MHz waveform

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32FFT Interleaver

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  1. 32FFT Interleaver Authors: Date: 2012-01-16 Ron Porat, Broadcom Slide 1

  2. Authors continued: Ron Porat, Broadcom Slide 2

  3. Outline • 32FFT OFDM was accepted in contribution 1311 as the PHY used for 1MHz waveform • In this contribution we provide simulation results for determining the value of Ncol used for one spatial stream interleaver • Recall Ncol determines the interleaver depth and is a divisor of the number of DATA tones (24 for 32FFT). Ron Porat, Broadcom Slide 3

  4. 5000 channel realizations • 256byte per packet, ideal receiver • 7 different interleaver sizes Ncol=[1 2 3 4 6 8 12]. • 2 channel models • SCM Urban Micro - used to represent a typical outdoor channel. • SCM Urban Macro – used to represent a high delay spread channel. Simulations in this case used per-packet average power normalization to better isolate the impact of the interleaver on performance Simulations Ron Porat, Broadcom Slide 4

  5. Advantage for Ncol=8 MCS0 Rep2 Ron Porat, Broadcom Slide 5

  6. All options are close MCS0 Ron Porat, Broadcom Slide 6

  7. Aside from Ncol=1 all options are close MCS3 Ron Porat, Broadcom Slide 7

  8. Ncol=6 or 8 provide the best performance MCS4 Ron Porat, Broadcom Slide 8

  9. Ncol=8 provides the best performance MCS5 Ron Porat, Broadcom Slide 9

  10. Ncol=6 or 8 provide the best performance MCS6 Ron Porat, Broadcom Slide 10

  11. Advantage to Ncol=12 with Ncol=8 following MCS7 Ron Porat, Broadcom Slide 11

  12. Ncol=8 provides the best overall performance from the lowest (and critical for range) MCS0 rep2 up to MCS7 Conclusions Ron Porat, Broadcom Slide 12

  13. Do you support Ncol=8 as the 32FFT interleaver choice? • Yes • No • ABS Straw Poll Ron Porat, Broadcom Slide 13

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