1. 1 UL Pilot Evaluation Results Document Number: IEEE C802.16m-08/1098r1 Date Submitted: 09-12-2008 Source: Jiacheng Wangjiacheng.wang@intel.com Huaning NiuHuaning.Niu@intel.comHuaning.Niu@intel.com Jong-kae (JK) FwuJong-kae.Fwu@intel.comJong-kae.Fwu@intel.com Yuval LomnitzYuval.Lomnitz@intel.comYuval.Lomnitz@intel.com Sassan AhmadiSassan.Ahmadi@intel.comSassan.Ahmadi@intel.com Hujun Yin Hujun.Yin@intel.comHujun.Yin@intel.com Intel Corp. Venue: IEEE Session #57, Kobe, Japan. Re: PHY: Text; in response to the TGm Call for Contributions and Comments 802.16m-08/033 for Session #57 Base Contributions: None Purpose: RE: IEEE 802.16m-08/024 Call for Comments on Project 802.16m System Description Document (SDD) on the topic of DL pilot. 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 UL Pilot Evaluation: 6x6 tile

3. 3 Key Observations Intel, Huawei-D and Cairo University have exactly the same 6x6 pilot pattern. MediaTek, LGE and Nortel have similar pilot patterns –MeidaTek has same pattern as LGE with the second pair of pilot flipped –MeidaTek used a rotated/shifted version of Nortel 6x6 pilot For MMSE channel estimation, –Huawei C, NSN and Postdata (old pattern) have slightly inferior performance –Samsung's pattern has lower overhead (2 pilots per stream) but is less stable –All others have good performance. –Intel/HuaweiD/CairoU, MediaTek and LGE are among the best DL 18x6 pilots have be studied and compared extensively, and is recommended to be used for UL 18x6 as well –Please refer to C80216m-08_847r3.ppt for 18x6 DL pilot performance comparisonC80216m-08_847r3.ppt UL 6x6: –Pilot patterns from Intel/HuaweiD/CairoU, MediaTek and LGE are among the best (with similar performance) and can be recommended for UL 6x6 pilot design.

4. 4 UL 18x6 Pilot Proposal : Use same DL 18x6 pilot pattern

5. 5 SDD Text Proposal Revise the text in IEEE 802.16m-08/003r4 -------------------- SDD Text Proposal --------------- 11.6.3 Pilot Structure The DL 18x6 pilot patterns defined in Section 11.5.3 are used for UL 18x6 pilots, which include pilots up to 4 TX streams.

6. 6 Simulation Setting eITU channel, with half lambda spacing in Tx, 4 lambda spacing at Rx. MIMO scheme: –2x2 2 streams collaborative MIMO Pilot boosting is 3dB per stream for all patterns –Same power combined with Null Noise limited case only 2% subcarrier spacing and +/- 1/8 CP timing offset. Perfect noise estimation

7. 7 eITU PB3, 2x2 SM, MMSE CE

8. 8

9. 9 eITU VA120, 2x2 SM, MMSE CE

10. 10 eITU VA120, 2x2 SM, MMSE CE

11. 11 Backup Slides

12. 12 UL Pilot Patterns (1) MediaTek (New and Old) Samsung NSN

13. 13 UL Pilot Patterns (2) LGE Intel NortelZTE

14. 14 UL Pilot Patterns (3) Posdata Huawei Cairo University