MIMO midamble sequence proposal (AWD-15.3.5) IEEE 802.16 Presentation Submission Template (Rev. 9)...
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MIMO midamble sequence proposal (AWD-15.3.5) IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S80216m-09/1313 Date Submitted: 2009-07-06 Source: Huaning Niu, Alexei Davydov, Yuan Zhu, Jiacheng Wang, Yuval Lomnitz, [email protected] 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 (UL-PHY)” Base Contribution: IEEE C80216m-09/1313 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: <http://standards.ieee.org/guides/bylaws/sect6-7 . html#6 > and < http://standards.ieee.org/guides/opman/ sect6 .html#6.3 >.
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Transcript of MIMO midamble sequence proposal (AWD-15.3.5) IEEE 802.16 Presentation Submission Template (Rev. 9)...
MIMO midamble sequence proposal (AWD-15.3.5)IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number:
IEEE S80216m-09/1313Date Submitted:
2009-07-06Source:
Huaning Niu, Alexei Davydov, Yuan Zhu, Jiacheng Wang, Yuval Lomnitz, [email protected] Doron, Gregory Morozov, Yang-seok Choi, Guangjie LiQinghua 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 (UL-PHY)”
Base Contribution:IEEE C80216m-09/1313
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:
<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 >.
Highlight of Mid-amble Design
• Reuse-1 mid-amble• 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
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
Midamble Signal
1
2
10
)2
1(22Re
used
used
gused
c
Nk
Nk
k
TtfN
kj
ktfj ebets
Time domain midamble waveform
MIMO midambe subcarrier modulating symbols
otherwise ,0
mod*
mod ,2
1 ),mod)](([21
1t
sct
usedD
k
NNN
skgNk
NkfftfftoffsetukG
b
Golay Sequence
subband specific antenna rotation
segment/cell specific offset for
interference averaging
offset to minimize PAPR
s = 0, for k≤(Nused-1)/2 s = 1, for k>(Nused-1)/2
MIMO Midamble Physical Structure
1st subband
2nd subband
Nth subband
1st TX antenna
2nd TX antenna
3rd TX antenna
4th TX antenna
Golay Sequence (Cont’d)Table 1 – Golay sequence of length 2048 bits
0xEDE2 0xED1D 0xEDE2 0x12E2 0xEDE2 0xED1D 0x121D 0xED1D 0xEDE2 0xED1D 0xEDE2 0x12E2
0x121D 0x12E2 0xEDE2 0x12E2 0xEDE2 0xED1D 0xEDE2 0x12E2 0xEDE2 0xED1D 0x121D 0xED1D
0x121D 0x12E2 0x121D 0xED1D 0xEDE2 0xED1D 0x121D 0xED1D 0xEDE2 0xED1D 0xEDE2 0x12E2
0xEDE2 0xED1D 0x121D 0xED1D 0xEDE2 0xED1D 0xEDE2 0x12E2 0x121D 0x12E2 0xEDE2 0x12E2
0x121D 0x12E2 0x121D 0xED1D 0x121D 0x12E2 0xEDE2 0x12E2 0xEDE2 0xED1D 0xEDE2 0x12E2
0x121D 0x12E2 0xEDE2 0x12E2 0xEDE2 0xED1D 0xEDE2 0x12E2 0xEDE2 0xED1D 0x121D 0xED1D
0xEDE2 0xED1D 0xEDE2 0x12E2 0x121D 0x12E2 0xEDE2 0x12E2 0xEDE2 0xED1D 0xEDE2 0x12E2
0xEDE2 0xED1D 0x121D 0xED1D 0x121D 0x12E2 0x121D 0xED1D 0xEDE2 0xED1D 0x121D 0xED1D
0x121D 0x12E2 0x121D 0xED1D 0x121D 0x12E2 0xEDE2 0x12E2 0x121D 0x12E2 0x121D 0xED1D
0xEDE2 0xED1D 0x121D 0xED1D 0xEDE2 0xED1D 0xEDE2 0x12E2 0xEDE2 0xED1D 0x121D 0xED1D
0x121D 0x12E2 0x121D 0xED1D 0xEDE2 0xED1D 0x121D 0xED1D
Table 2 – Offsets in the Golay sequence FFT size Offset
2048 30 1024 60 512 40
Golay: Partial Cross-Correlation Performance
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
X-correlation
CD
F
Golay_1024fft_Xcorr_Opt1
#1#2
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
X-correlationC
DF
Golay_1024fft_Xcorr_Opt1
#1#2#3#4
u = 0,1,2,…,127
2TX antenna 4TX antenna
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
Midamble Tb/2 per-antenna Auto-correlation, 2Tx, FFT=512
0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.160
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
cross-correlation
CD
F
CDF of midamble Tb/2 auto-correlation, 2Tx
Midamble Tb/2 per-antenna Auto-correlation, 4Tx, FFT=512
0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.160
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
cross-correlation
CD
F
CDF of midamble Tb/2 auto-correlation, 4Tx
Midamble Tb/2 per-antenna Auto-correlation, 8Tx, FFT=512
0 0.02 0.04 0.06 0.08 0.1 0.12 0.140
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
cross-correlation
CD
F
CDF of midamble Tb/2 auto-correlation, 8Tx
Cross-correlation: Midamble x 16e preamble, 2Tx, FFT=512
0 0.05 0.1 0.15 0.2 0.25 0.3 0.350
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
cross-correlation
CD
F
CDF of cross-correlation between midamble and 16e preamble, 2Tx
Cross-correlation: Midamble x 16e preamble, 4Tx , FFT=512
0 0.05 0.1 0.15 0.2 0.25 0.3 0.350
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
cross-correlation
CD
F
CDF of cross-correlation between midamble and 16e preamble, 4Tx
Cross-correlation: Midamble x 16e preamble, 8Tx , FFT=512
0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.20
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
cross-correlation
CD
F
CDF of cross-correlation between midamble and 16e preamble, 8Tx
Cross-correlation: Midamble x 16m PA-preamble, 2Tx , FFT=512
0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.20
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
cross-correlation
CD
F
CDF of cross-correlation between midamble and 16m PA-preamble, 2Tx
Cross-correlation: Midamble x 16m PA-preamble, 4Tx , FFT=512
0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.20
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
cross-correlation
CD
F
CDF of cross-correlation between midamble and 16m PA-preamble, 4Tx
Cross-correlation: Midamble x 16m PA-preamble, 8Tx , FFT=512
0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.180
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
cross-correlation
CD
F
CDF of cross-correlation between midamble and 16m PA-preamble, 8Tx
Golay: PAPR Performance
2 3 4 5 6 7 8 9 10 11 12 130
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
PAPR [db]
CD
F
Golay_1024FFT
seq-1, opt-1, Nt = 2
seq-1, opt-1, Nt = 4
seq-1, opt-2, Nt = 2
seq-1, opt-2, Nt = 4
Performance with per subband antenna rotation
Performance without per subband antenna rotation
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
