1. IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number:
Proposed Text of Primary Advanced Preamble for the IEEE m Amendment
IEEE Presentation Submission Template (Rev. 9)
Document Number:
IEEE S802.16m-09/1463
Date Submitted:
Source:
Zheng Yan-Xiu, Yu-Chuan Fang, Chang-Lan Tsai, Chung-Lien Ho
ITRI
Venue:
IEEE m-09/0028r1, Call for contributions on 16m AWD content
“Comments on AWD Primary Advanced Preamble”
Base Contribution: IEEE C802.16m-09/1463
Purpose:
To be discussed and approval by IEEE m TG
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2. Motivation
Increase the number of PA-Preamble sequences
Enhance reception performance for single frequency network like PA-Preamble deployment
Detect multiple basestation types
Facilitate CSG/OSG femto BS and microcell BS detection

3. Anchor based MFSK
Anchor carrier is overlapped for all PA-Preambles to facilitate the lock of center frequency
MFSK interleaves PA-Preambles on frequency domain to reduce interference to different PA-Preambles
An AMS can detect macro BS and femto BS at the same time to facilitate handover procedure
CSG femto BS does not interfere the performance of PA-Preamble detection and further enhance the synchronization performance due to overlapped anchor carrier
Low detection complexity: only 15 subcarriers correlation detector is applied

4. Subcluster-based MIMO scheme
Different subclusters are rotated with different phase rotation from different basestations
The scheme avoids signal cancellation on frequency domain and increase the PA-Preamble detection performance

5. Anchor based MFSK vs. CDM
Single frequency network
All Preambles are either interlaced on frequency domain or the same on overlapped subcarriers
MFSK with anchor carrier assists in detecting PA-Preamble with different Preambles
BS type:
The preamble allows multiple PA-Preamble sends at the same time
Multiple BS types are differentiated at the same time
It facilitate the handover form macro BS to CSG/OSG femto BS or micro BS to share the load from macro BS
Less brute-force SA-Preamble detection can be avoided
Low complexity: only 15 subcarriers correlation detection can be applied
More sequences: 17 sequences
Single frequency network
Only one PA-Preamble send within entire network
CDM will degrade the detection performance CDM
BS type:
It degrades the performance of PA-Preamble due to overlapped scenario
High complexity: at least 216 subcarriers differential detection is necessary
Less sequences: 11 sequences

6. Information Content Index Carrier ABS type BW Fully configured
Fully configured
ABS included in NBR_ADV
5 MHz 1
10 MHz 2
20 MHz 3
N/A 4 5 6 7 8 9 10 11 12 13 14 15
CSG femto BS 16
Partially configured

7. Simulation Results Detection performance for A-Preamble is evaluated
PA-Boosting level [dB]
Comp\FFT
512
IEEE m
7.58
ITRI
ITRI MBS
Detection performance for A-Preamble is evaluated
Detection performance of PA-Preamble
Two proposals
ITRI PA-Preamble with IEEE m SA-Preamble
IEEE m PA-Preamble and SA-Preamlbe
Three scenarios:
PA-Preamble detection performance without timing error
A-Preamble detection performance with real timing estimation
No interference
SIR=2dB
SA-Boosting level [dB]
Comp\FFT
512
IEEE m
7.11
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 IEEE m
Cluster-based correlator and energy detection for ITRI

8. PA-Preamble Detection Performance under Single Frequency Network for ITRI Proposal
Scenario:
Two transmission antennas
Two basestations
Perfect timing
Identical transmission power
ITRI’s proposal renders better detection performance
ITRI’s proposal avoids signal cancellation within the network

9. A-Preamble Detection Error Rate with No Interference
ITRI and IEEE m proposals render similar performance
No performance degradation

10. A-Preamble Detection Error Rate with SIR=2dB
ITRI’s proposal provides better detection performance
It comes from better PA-Preamble detection
When we consider that whole network applies identical PA-Preamble, ITRI’s proposal is more competitive

11. Conclusion
Anchor based MFSK PA-Preamble provides more system features comparing to AWD 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 better performance to CDM PA-Preamble and enhances A-Preamble detection performance
Adopt the proposed text in C802.16m-09/XXXX