Proposed Text of Primary Advanced Preamble for the IEEE 802.16m

Proposed Text of Primary Advanced Preamble for the IEEE 802.16m Amendment IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16m-09/1463r1 Date Submitted: 2009-7-8 Source: Zheng Yan-Xiu, Yu-Chuan Fang, Chang-Lan Tsai, Chung-Lien Ho E-mail: [email protected]. ITRI Venue: IEEE 802.16m-09/0028r1, Call for contributions on 16m AWD content “Comments on AWD 15.3.6.1.1 Primary Advanced Preamble” Base Contribution: IEEE C802.16m-09/1463 Purpose: To be discussed and approval by IEEE 802.16m TG 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 .

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

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

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 7 phase rotation vectors are proposed in this proposal

Anchor based MFSK vs. CDM Anchor based MFSK CDM Single frequency network – – BS type: – – – – All Preambles are either interlaced on frequency domain or the same on overlapped subcarriers MFSK with anchor carrier assists in detecting PAPreamble with different Preambles 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 – – BS type: – Only one PA-Preamble send within entire network CDM will degrade the detection performance CDM 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

Information Content Index Carrier ABS type BW 0 5 MHz ABS included NBR ADV 1 in 10 MHz 2 20 MHz 3 5 MHz ABS not included in NBR ADV 4 5 20 MHz 6 N/A 7 N/A 8 10 MHz Fully configured N/A N/A N/A N/A N/A 9 N/A 10 N/A N/A 11 N/A N/A 12 N/A N/A 13 N/A N/A 14 N/A N/A 15 CSG femto BS N/A N/A N/A 16 Partially configured

Simulation Results Detection performance for A-Preamble is evaluated Detection performance of PA-Preamble Two proposals are compared – ITRI PA-Preamble with IEEE 802.16m SA-Preamble PA-Boosting level [dB] Comp\FFT IEEE 802.16m No interference SIR 2dB 7.58 ITRI Two 17.9287 ITRI All 17.3249 SA-Boosting level [dB] Comp\FFT Two phase rotation vectors All phase rotation vectors – IEEE 802.16m PA-Preamble and SAPreamlbe Three scenarios: – PA-Preamble detection performance without timing error – A-Preamble detection performance with real timing estimation 512 512 IEEE 802.16m 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 802.16m Cluster-based correlator and energy detection for ITRI

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

A-Preamble Detection Error Rate with No Interference ITRI and IEEE 802.16m proposals render similar performance No performance degradation

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

Conclusion Anchor based MFSK PA-Preamble provides more system features comparing to AWD CDM PA-Preamble – Enhance reception performance on single frequency network like deployment – Detect multiple BS types at the same time without performance degradation – CSG femto BS can be distinguished in case of introducing redundant SAPreamble detection – Less detection complexity – More PA-Preamble sequences MFSK PA-Preamble provides better performance to CDM PAPreamble and enhances A-Preamble detection performance Adopt the proposed text in C802.16m-09/1463