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MIMO midamble sequence proposal (AWD-15.3.5) IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S80216m-09/1313r2 Date Submitted:

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Presentation on theme: "MIMO midamble sequence proposal (AWD-15.3.5) IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S80216m-09/1313r2 Date Submitted:"— Presentation transcript:

1 MIMO midamble sequence proposal (AWD-15.3.5) IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S80216m-09/1313r2 Date Submitted: 2009-07-06 Source: Huaning Niu, Alexei Davydov, Yuan Zhu, Jiacheng Wang, Yuval Lomnitz,huaning.niu@intel.com Ayelet Doron, Gregory Morozov, Yang-seok Choi, Guangjie Li Qinghua Li Intel Corporation Venue: IEEE 802.16m Session#62, San Francisco, USA Category: AWD comments / Area: Chapter 15.3.5 (DL-PHY) “Comments on AWD 15.3.9 (DL-PHY)” Base Contribution: IEEE C80216m-09/1313r2 Purpose: Discussion and approval Notice: This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and.http://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Further information is located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat

2 Highlight of Mid-amble Design Reuse-3 mid-amble –Better cell edge performance –Better support of Multi-BS MIMO Mid-amble frequency structure –Tone rotation per sub-band to avoid periodicity per antenna Mid-amble sequence –Golay Hadamard sequence –2dB boosting Mid-amble position –Fixed second sub-frame to allow enough time for MS processing

3 Midamble Frequency Structure Mid-amble should avoid similar structure as 16m P-preamble and 16e preamble –Low mis-detection is both auto-correlation type receiver and cross-correlation type receiver –Work with any channel statistics Solution: Tone rotation per sub-band to avoid periodicity per antenna

4 Midamble Signal Time domain midamble waveform MIMO midambe subcarrier modulating symbols

5 Golay Sequence subband specific antenna rotation segment/cell specific offset for interference averaging offset to minimize PAPR s = 0, for k≤(N used -1)/2 s = 1, for k>(N used -1)/2

6 Example of MIMO Midamble Physical Structure for BSID = 0

7 Golay Sequence (Cont’d)

8 Mid-amble Evaluation Tb/2 autocorrelation per antenna –Avoid similarity to 16m P-preamble per antenna Cross-correlation with 16e preamble and 16m P-preamble PAPR mid-amble sequence

9 Midamble Tb/2 per-antenna Auto- correlation, 2Tx, FFT=512

10 Midamble Tb/2 per-antenna Auto-correlation, 4Tx, FFT=512

11 Midamble Tb/2 per-antenna Auto-correlation, 8Tx, FFT=512

12 Cross-correlation: Midamble x 16e preamble, 2Tx, FFT=512

13 Cross-correlation: Midamble x 16e preamble, 4Tx, FFT=512

14 Cross-correlation: Midamble x 16e preamble, 8Tx, FFT=512

15 Cross-correlation: Midamble x 16m PA-preamble, 2Tx, FFT=512

16 Cross-correlation: Midamble x 16m PA-preamble, 4Tx, FFT=512

17 Cross-correlation: Midamble x 16m PA-preamble, 8Tx, FFT=512

18 Midamble Maximal Power booting (2Tx) The allowed power boosting of mid-amble when the peak power is the same as 16e preamble (after 9dB boosting) –FFT = 512: 7.19dB –FFT = 1024: 7.16dB –FFT = 2048: 7.02dB The proposed 2dB mid-amble boosting leave a reasonable headroom in dynamic range of ADC

19 Midamble Maximal Power booting (4Tx) The peak power is the same as 16e preamble (after 9dB boosting) FFT = 512: 9.04dB FFT = 1024: 9.15dB FFT = 2048: 9.30dB

20 Midamble Maximal Power booting (8Tx) The peak power is the same as 16e preamble (after 9dB boosting) FFT = 512: 12.14dB FFT = 1024: 11.78dB FFT = 2048: 12.21dB

21 Summary Proposed mid-amble structure support good MIMO channel estimation for cell center and cell edge user –Good multi-cell BS MIMO support Low mis-detection of 16m P-preamble and 16e preamble Low PAPR sequence to allow mid-amble boosting

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