UL Pilot Evaluation Results Document Number: IEEE C802.16m-08/1098 Date Submitted: 07-10-2008 Source: Jiacheng Wang jiacheng.wang@intel.com Huaning Niu Huaning.Niu@intel.com Jong-kae (JK) Fwu Jong-kae.Fwu@intel.com Yuval Lomnitz Yuval.Lomnitz@intel.com Sassan Ahmadi Sassan.Ahmadi@intel.com Hujun Yin Hujun.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: <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and <http://standards.ieee.org/guides/opman/sect6.html#6.3>. Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and <http://standards.ieee.org/board/pat >.

UL Pilot Evaluation: 6x6 tile

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

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, Samsung's pattern is very unstable since it use 2 pilot per stream. For MMSE channel estimation, Huawei C, NSN and Postdata (old pattern) have slightly inferior performance than others All others are good performance. For MMSE channel estimation, Intel/HuaweiD/CairoU, MediaTek and LGE are among the best

eITU PB3, 2x2 SM, MMSE CE

eITU PB3, 2x2 SM, MMSE CE

eITU VA120, 2x2 SM, MMSE CE

eITU VA120, 2x2 SM, MMSE CE

Conclusions: UL 18x6 pilot patterns should reuse the DL 18x6 pilot patterns Please refer to C80216m-08_847r2.ppt for 18x6 DL pilot performance comparison and summary 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.

UL Pilot Proposal : Use same DL pilot pattern + 6x6 pilot 6x6 pilot: TBD

Backup Slides

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

UL Pilot Patterns (2) Intel LGE Nortel ZTE

UL Pilot Patterns (3) Posdata Huawei Cairo University