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UL Pilot Evaluation Results
Document Number: IEEE C802.16m-08/1098r1Date Submitted: 09-12-2008
Source:Jiacheng Wang [email protected] Niu [email protected] (JK) Fwu [email protected] Yuval Lomnitz [email protected] Ahmadi [email protected] Yin [email protected]
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 #57Base Contributions:
NonePurpose:
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 >.
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UL Pilot Evaluation: 6x6 tile
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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
comparison
• 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.
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UL 18x6 Pilot Proposal : Use same DL 18x6 pilot pattern
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2
1
2
1
2
1
2
1
2
1
2
Pilot stream 1
Pilot stream 2
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SDD Text Proposal
Revise the text in IEEE 802.16m-08/003r4 -------------------- SDD Text Proposal ---------------
11.6.3 Pilot StructureThe DL 18x6 pilot patterns defined in Section 11.5.3 are used for UL 18x6 pilots, which include pilots up to 4 TX streams.
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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
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eITU PB3, 2x2 SM, MMSE CE
-5 0 5 10 15 20 25 300
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
SNR
Thr
ou
ghp
ut(b
it/su
bca
rrie
r)
eITU PB3 channel, 2x2 SM, MMSE CE
IntelCairo UniversityMediaTekPostdataNortelZTEHuawei, pattern CHuawei, pattern DSamsungNSNLG
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eITU PB3, 2x2 SM, MMSE CE
-5 0 5 10 15 20 25 300
10
20
30
40
50
60
70
80
90
100
SNR
Los
s of
Thr
ou
ghp
ut f
rom
the
Bes
t (%
100
)
eITU PB3 channel, 2x2 SM, MMSE CE
IntelCairo UniversityMediaTekPostdataNortelZTEHuawei, pattern CHuawei, pattern DSamsungNSNLG
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eITU VA120, 2x2 SM, MMSE CE
-5 0 5 10 15 20 25 300
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
SNR
Thr
ou
ghp
ut(b
it/su
bca
rrie
r)
eITU VA120 channel, 2x2 SM, MMSE CE
IntelCairo UniversityMediaTekPostdataNortelZTEHuawei, pattern CHuawei, pattern DSamsungNSNLG
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eITU VA120, 2x2 SM, MMSE CE
-5 0 5 10 15 20 25 300
10
20
30
40
50
60
70
80
90
SNR
Los
s of
Thr
ou
ghp
ut f
rom
the
Bes
t (%
100
)
eITU VA120 channel, 2x2 SM, MMSE CE
IntelCairo UniversityMediaTekPostdataNortelZTEHuawei, pattern CHuawei, pattern DSamsungNSNLG
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Backup Slides
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UL Pilot Patterns (1)
• MediaTek (New and Old)
• Samsung
• NSN
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UL Pilot Patterns (2)
• LGE• Intel
• Nortel • ZTE
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UL Pilot Patterns (3)
• Posdata
• Huawei
• Cairo University
