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1 Comparison of DL Pilot Patterns IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08/798r1 Date Submitted: 2008-07-07.

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Presentation on theme: "1 Comparison of DL Pilot Patterns IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08/798r1 Date Submitted: 2008-07-07."— Presentation transcript:

1 1 Comparison of DL Pilot Patterns IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08/798r1 Date Submitted: 2008-07-07 Source: Jinsoo Choi, HanGyu Cho, Bin-chul Ihm, Wookbong Lee E-mail:{emptylie, hgcho, bcihm, wbong}@lge.com LG Electronics, Inc. Venue: TGm call for comments on IEEE 802.16m-08/024. Specific topic : “DL Pilot scheme” Base Contribution: N/A Purpose: To be discussed and adopted by TGm 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 2 Simulation Assumption ◙LLS Simulation defined by “C802.16m-08/518” Appendix A. ◙Common pilot –MMSE channel estimation using pilots over multiple PRUs (frequency domain), Dedicated pilot - MMSE channel estimation per RU ◙Normalized throughput for noise limited simulation ◙2Tx SM/SFBC, 4Tx SM/SFBC, 4Tx pre-coding rank1(fixed codebook) ◙Pilot boosting (2Tx SM/SFBC: 3dB, 4Tx SM/SFBC : 6dB, 4Tx pre- coding rank1 : non boosting) ◙MCS: QPSK ½, 16QAM ½, 64QAM ½ ◙Distributed subchannelization defined by “C80216m-08_517r1” for common pilot and localized subchannelization for dedicated pilot

3 3 Common pilot patterns for 2Tx ◙Referred by “C802.16mDL_PHY-08/009r5”

4 4 Performance comparison for 2Tx common pilot patterns ◙LGE, Intel, Samsung almost show best performance. ◙Motorola shows good performance in some SNR regions.

5 5 Common pilot patterns for 4Tx ◙Referred by “C802.16mDL_PHY-08/009r5”

6 6 Performance comparison for 4Tx common pilot patterns ◙LGE shows almost best performance. ◙Motorola shows good performance in some SNR regions.

7 7 Dedicated pilot patterns for 4Tx ◙Referred by “C802.16mDL_PHY-08/009r5”

8 8 Performance comparison for 4Tx dedicated pilot patterns ◙LGE, Motorola, MediaTek show best performance until 16dB region. ◙Samsung and Intel show best performance over 16dB region.

9 9 Conclusion ◙In 2Tx configuration with common pilot  With equal pilot density, each pattern has similar performance.  11.11% pilot density seems to be proper pilot overhead.  LGE, Intel, Samsung have almost best performance. ◙In 4Tx configuration with common pilot  The pilot pattern of LGE shows almost best performance. ◙In 4Tx configuration with dedicated pilot  LGE, Motorola, MediaTek have best performance until middle SNR range.  Samsung and Intel show best performance in high SNR range.

10 10 Proposed Text for SDD (1) Insert the following into SDD Section 11.5.3 in IEEE 802.16m-08/003r3 11.5.3 Pilot Structure 11.5.3.1 Common pilot structure

11 11 Proposed Text for SDD (2) 11.5.3 Pilot Structure 11.5.3.2 Dedicated pilot structure

12 12 Appendix – Separated results for each MCS

13 13 2Tx common pilot patterns

14 14 2Tx common pilot patterns

15 15 4Tx common pilot patterns

16 16 4Tx common pilot patterns

17 17 4Tx dedicated pilot patterns

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