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Sounding Sequences Comparison for IEEE 802.16m IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C80216m-09/2232 Date Submitted:

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Presentation on theme: "Sounding Sequences Comparison for IEEE 802.16m IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C80216m-09/2232 Date Submitted:"— Presentation transcript:

1 Sounding Sequences Comparison for IEEE 802.16m IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C80216m-09/2232 Date Submitted: 2009-11-06 Source: Ying Li, Yen-Wen Huang E-mail: eeyli@saturn.yzu.edu.tw Yuan Ze University * http://standards.ieee.org/faqs/affiliationFAQ.html Venue: IEEE Session #64, Atlanta, Georgia Re: IEEE 802.16-09/0057, “IEEE 802.16 Working Group Letter Ballot Recirc #30a, on P802.16m/D2” Base Contribution: N/A Purpose: To be discussed in TGm for the IEEE P802.16m/D2 Draft. 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: and.http://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Further information is located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat

2 Introduction Existing sounding sequence adopted for 802.16m –Sequence I (C80216m_09/0771): 802.16e sequence based on BPSK Golay Sequence –Intel proposed, compared with Samsung proposed poly- phase sequences in C80216m_09/1121 Proposed sounding sequence: 802.16e compatible sequences based on QPSK Golay sequences Comparison: PAPR, cross correlation, complexity

3 PAPR Analysis: CDM (Cyclic Shift Separability) 1024 FFT Nused=865 Loading size 864 tones (12 subbands) Seq. 1: Existing Seq (Intel) Seq. 2: Samsung (not adopted) PAPR 4~9dB （ from C80216m_09/1121) YZU Proposed Sounding Seq. PAPR <= 3.0103 dB PAPR variance small

4 PAPR Analysis: FDM (Decimation Separability) 1024 FFT Nused=865 Loading size 864 tones (12 subbands) Seq. 1: Existing Seq (Intel) Seq. 2: Samsung (not adopted) PAPR 2~9dB （ from C80216m_09/1121) YZU Proposed Sounding Seq. PAPR <= 3.0103 dB PAPR variance small

5 Cross Correlation Analysis Table and Figures are from Samsung’s report (C80216m_09/0849) Seq. 1 (802.16e, Intel) Seq. 2(Samsung) 16eProposedGain PAPR5dB ~ 7dB3dB ~ 7dB0dB ~ 4dB* Probability of zero correlation 40%85%45%* Sounding SNR5dB ~ 6dB6dB~10dB1dB ~ 4dB*

6 Cross Correlation Analysis Probability of zero cross correlation high (greater than 90% in FDM) Maximum cross correlation <0.5 (Maximum cross correlation=1 for Intel and Samsung’s sequences)

7 Proposed Sounding Sequences Performance overview –Max PAPR higher for larger D (PAPR=6.72dB, D=16, 1024-FFT ), but not for larger P –Max Cross Correlation for larger D, P –Total No. of Seq. U*D or U*P, for large FFT U can increase

8 Complexity Analysis Existing sounding sequence adopted for 802.16m –Alphabet size 2 for FDM lcm(2, P) for CDM –BPSK Golay Sequence of length 1024 stored in lookup table (table corruption error in 2004 standard, corrected in 2006, updated in standard in 2009) Proposed sounding sequence –Alphabet size (moderate Increase in alphabet size) lcm(2, D) for FDM lcm (4, P) for CDM –QPSK Golay sequence from recursive construction (no need for lengthy lookup tables, prevent errors)

9 Conclusion Existing Seq. have >3dB PAPR and large PAPR variance due to length mismatch/ puncturing Proposed Seq. based on QPSK Golay Seq. are compatible with 802.16e, have 3dB PAPR (higher power efficiency), Lower Cross Correlation (less interference), with moderate complexity increase Recommendation: Adopt proposed Seq. for 802.16m uplink sounding

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