Transcript Slides S802.16m-09/1308

Sounding sequence proposal for 802.16m (AWD-15.3.9)
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE S80216m-09/1308
Date Submitted:
2009-07-06
Source:
Alexey Davydov
Gregory Morozov
Intel Corporation
Venue:
IEEE 802.16m Session#62, San Francisco, USA
Category: AWD comments / Area: Chapter 15.3.9 (UL-CTRL)
“Comments on AWD 15.3.9 (UL-CTRL)”
Base Contribution:
IEEE C80216m-09/1308
Purpose:
Discussion and approval
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Introduction
• Sounding sequence definition is missing in
the current AWD
• In this contribution we propose sounding
sequence for 802.16m and details on the
MSs multiplexing schemes
Sounding sequence proposal
• Binary Golay sequence of length 2048 bits
from 802.16e standard
• Common for all FFT sizes, multiplexing
schemes and parameters of the
corresponding multiplexing schemes
• Unique sequence for each cell and sector
• Guarantees low PAPR and cross correlation
values
Support of FDM and CDM
• FDM subcarrier modulation
subcarrier symbol
sounding allocation
N
1
 1

2    G[k  u  offset D  fft] mod 2048,
k  B, k  used
, k mod D  g
bk    2
2


0
otherwise

baseline binary Golay sequence
subcarrier decimation
• CDM subcarrier modulation
k
 j 2 n
 1

P
2   G [k  u  offset D  fft ] mod 2048  e
,
bk    2


0
otherwise
cell/sector specific offset
multiplexing code
k  B, k 
N used  1
2
FFT dependent offset to min. PAPR
PAPR Performance
CDM
P
P
P
P
0.9
=
=
=
=
2
4
8
16
P
P
P
P
0.9
=
=
=
=
2
4
8
16
0.8
0.7
0.7
0.7
0.6
0.6
0.6
CDF
0.8
0.5
0.5
0.4
0.4
0.3
0.3
0.3
0.2
0.2
0.2
0.1
0.1
0.1
0
2
3
4
5
6
7
8
9
10
11
12
13
0
2
3
4
5
6
7
8
PAPR [dB]
9
10
11
12
=
=
=
=
2
4
8
16
0.5
0.4
0
P
P
P
P
0.9
0.8
CDF
CDF
1
1
1
13
2
3
4
5
6
7
8
9
10
11
12
13
PAPR [dB]
PAPR [dB]
FDM
1
D=
D=
D=
D=
0.9
1
2
4
8
16
1
D=
D=
D=
D=
0.9
2
4
8
16
D=
D=
D=
D=
0.9
2
4
8
16
0.8
0.8
0.8
0.7
0.7
0.6
0.6
0.7
CDF
0.5
CDF
CDF
0.6
0.5
0.5
0.4
0.4
0.4
0.3
0.3
0.2
0.2
0.1
0.1
0.3
0.2
0.1
0
2
3
4
5
6
7
8
PAPR [dB]
9
10
11
single subband
12
13
0
2
3
4
5
6
7
8
9
10
11
four subbands
PAPR [dB]
12
13
0
2
3
4
5
6
7
8
9
10
11
12
all possible alloc.
PAPR [dB]
13
Cross correlation performance
1
P
P
P
P
0.9
=
=
=
=
2
4
8
16
0.8
0.7
CDF
0.6
90% of the
sequences has cross
correlation values
less than 0.2
0.5
Probability of high
cross correlation
values (>0.5) is
almost zero
0.4
0.3
0.2
0.1
0
0
0.1
0.2
0.3
0.4
0.5
x-correlation
0.6
0.7
0.8
0.9
1
Simulation conditions
System Parameters
Sounding Sequence
Loading
Multiplexing
Number of interfering
sources
Target SINR
Estimation
1024 FFT, 10 MHz, 2.4GHz
Golay
Full Loading (100%): NMS = D = P = 6
Partial Loading (33%): NMS = 6, D = P = 18
FDM (D decimation), CDM (P max. cyclic shift)
57 sectors
10 dB
LS+MMSE
System level performance analysis
eITU Ped-B (3kmph), N
=6
MS
1
Full load. 100% FDM D=6
0.9
Full load. 100% CDM P=6
Part load. 33% FDM D=18
0.8
Part load. 33% CDM P=18
0.7
CDF
0.6
0.5
0.4
0.3
0.2
0.1
0
-50
-40
-30
-20
-10
0
MSE, dB
10
20
30
40
50
Conclusion
• The proposed sequence provides low PAPR and
cross correlation characteristics
• The performance of CDM and FDM have been
validated using system level simulations
• The proposed sequence is the same as 802.16e
sequence which is preferable in terms of
implementation complexity
• Recommendation is to adopt the text provided in
IEEE C80216m-09/1308 contribution or it’s latest
revision