MFSK PA-Preamble
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE S802.16m-09/1134
Date Submitted:
2009-4-27
Source:
Zheng Yan-Xiu, Yu-Chuan Fang, Chang-Lan Tsai, Chung-Lien Ho, Hsi-Min Hsiao
E-mail: zhengyanxiu@itri.org.tw.
ITRI
Venue:
Re: IEEE 802.16m-09/0020, Call for contributions on 16m AWD content.
Category: AWD-DG Comments / Area: Others (SCH DG)
“Comments on AWD 15.3.6.1 Advanced Preamble”
Base Contribution: IEEE S802.16m-09/1134
Purpose:
To be discussed and approval by IEEE 802.16m TG
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MFSK vs. CDM
MFSK
CDM
•
•
Single frequency network
–
–
–
•
•
•
•
All Preambles are interlaced on frequency domain
ABSs not included in NDR-ADV do not interfere
Macro ABS
CSG femto BSs do not create interference to Macro
ABS
Detecting both macro BS and femto BS at
the same time is feasible due to frequency
domain interlaced signal
Low complexity: only 12 subcarriers
correlation detection can be applied
More sequences: 17 sequences
CSG femto BS does not cause huge SApreamble detection
Not single frequency network due to the
ABSs not included in NDR-ADV
–
•
•
•
•
Hotzone, OSG femto BS and CSG femto BS create
interference to macro cell
Detecting both macro BS and femto BS at
the same time is not feasible due to 10dB
power difference
High complexity: at least 216 subcarriers
differential detection is necessary
Less sequences: 11 sequences
CSG femto BS shall causes huge PAPreamble detection
Information Content
Index
Carrier
ABS type
BW
0
5 MHz
1
10 MHz
ABS included in
NBR_ADV
2
3
4
5
20 MHz
reserved
reserved
Fully configured
5 MHz
6
10 MHz
ABS not included
in NBR_ADV
7
20 MHz
8
reserved
9
reserved
10
Partially configured
N/A
N/A
11
CSG femto BS
N/A
N/A
12
reserved
N/A
N/A
13
reserved
N/A
N/A
14
reserved
N/A
N/A
15
reserved
N/A
N/A
16
reserved
N/A
N/A
Simulation Results
PA-Boosting level [dB]
Comp\FFT
512
Samsung
7.58
ITRI
19.19
• Detection performance for
A-Preamble is evaluated
SA-Boosting level [dB]
Comp\FFT
512
Samsung
7.11
• Two proposals
– ITRI PA-Preamble with
Intel/Samsung SA-Preamble
– Intel PA-Preamble with
Intel/Samsung SA-Preamlbe
• Two scenarios:
– No interference
– 2dB SIR
Channel Bandwidth
5MHz
Center frequency
2.5GHz
Frequency offset
10ppm
Over-sampling Factor
28/25
FFT Size
512
Cyclic prefix (CP) ratio
1/8
Channel condition
PB3, VA60, VA120
The number of antennas
Tx:2, Rx:1
Modulation
BPSK, QPSK,MPSK
Receiver
Differential Detection for
Intel/Samsung, ZTE
Cluster-based correlator and
energy detection for ITRI
Detection Error Rate
• Both design provides similar performance
Conclusion
• MFSK PA-Preamble provides more system features
comparing to CDM PA-Preamble
– Detect multiple BS types at the same time
– Less detection complexity
– CSG femto BS can be distinguished in case of introducing
redundant SA-Preamble detection
– More PA-Preamble sequences
• MFSK PA-Preamble provides similar performance to
CDM PA-Preamble
• Adopt the proposed text #6 in C802.16m-09/0894r2