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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

July, 2009. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: FPP-SUN: Performance Results of Option 1 in Scalable OFDM PHY . Date Submitted: July, 2009 Source: Sangsung Choi & Cheolho Shin

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

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  1. July, 2009 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title:FPP-SUN: Performance Results of Option 1 in Scalable OFDM PHY. Date Submitted: July, 2009 Source: Sangsung Choi & Cheolho Shin Electronics and Telecommunications Research Institute(ETRI) Voice: +82 42 860 6722, +82 42 860 6831 Fax: +82 42 860 5218 E-maill: sschoi@etri.re.kr, chshin@etri.re.kr Re: IEEE 802.15 Task Group 4g Call for Proposals (CFP) on 22 January, 2009 Abstract: This presentation summarizes the performance results of the Option 1. Purpose: Proposal for consideration by the TG4g Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15. Slide 1

  2. A Future Proof Platform in SUN: Performance Results of Option 1 in Scalable OFDM PHY. July, 2009 Sangsung Choi & Cheolho Shin Supporters: Roberto Aiello [Independent], Sangsung Choi [ETRI], Bob Fishette [Trilliant], David Howard [On-Ramp], Rishi Mohindra [MAXIM], Emmanuel Monnerie [Landis & Gyr], Partha Murali [Redpine Signal], Steve Shearer [Independent], Shusaku Shimada [Yokogawa Electric Co.], Kendall Smith [Aclara] Slide 2

  3. Scalable OFDM PHY overview of modes simulated SUN Channel Using TV White Space Tx Model for Scalable OFDM PHY Channel Model Used Simulation Results - AWGN Simulation Results - Multipath Sensitivity and Link Margin Calculations Summary References Outline July, 2009 Slide 3

  4. Scalable OFDM PHY overview of modes simulated July, 2009 • Frequency: TV white space • UHF (CH 14 ~ CH 51) : 512 - 608MHz / 614-698MHz • TX power limit: 20 dBm (assume) • Modulation • - OFDM/BPSK or QPSK • Data rates: 98/195/391/781 kbps • Convolutional encoder • - constraint length 7, ½ rate code • - generator polynomials G1,2 = [133, 171] • Interleaving • - i = (Ncbps/20)(k mod 20) + floor(k/20), k = 0, 1, 2, … Ncbps -1 • - Ncbps = 100(BPSK), 200(QPSK) • 128 IFFT/FFT Slide 4

  5. SUN Channel Using TV White Space July, 2009 • Can use 4 SUN Channels per 1 TV Channel • Can configure 4 piconets simultaneously. Slide 5

  6. Tx Model for Scalable OFDM PHY July, 2009 Convolutional encoder - constraint length 7, ½ rate code - generator polynomials G1,2 = [133, 171] Interleaving - i = (Ncbps/20)(k mod 20) + floor(k/20), k = 0, 1, 2, … Ncbps -1 - Ncbps = 100(BPSK), 200(QPSK) Slide 6

  7. Tx Model for Scalable OFDM PHY packet structure July, 2009 STF LTF Preamble Header Slide 7

  8. Tx Model for Scalable OFDM PHY Data rates in Option 1 July, 2009 • FDS: Frequency-Domain Spreading • TDS: Time-Domain Spreading Slide 8

  9. Tx Model for Scalable OFDM PHY Timing-related parameter July, 2009 Slide 9

  10. Tx Model for Scalable OFDM PHY Structure of OFDM Symbol July, 2009 Slide 10

  11. Tx Model for Scalable OFDM PHY FDS: Frequency-Domain Spreading TDS: Time-Domain Spreading July, 2009 Slide 11

  12. Tx Model for Scalable OFDM PHY 128 IFFT July, 2009 • Total of 128 tones: • 100 data tones used to transmit information • (constellation: QPSK). • - 8 pilot tones used for carrier and phase tracking. • - Remaining 20 tones including DC are NULL tones. Slide 12

  13. Channel Model used July, 2009 Slide 13

  14. Simulation Results – AWGN July, 2009 Slide 14

  15. Simulation Results – Typical Urban July, 2009 Slide 15

  16. Simulation Results – Bad Urban July, 2009 Slide 16

  17. Simulation Results – Hilly Terrain July, 2009 Slide 17

  18. Summary of Simulation Results July, 2009 • Use 1,000 Packets for simulation • SNRs for 10% Packet Error Rate Slide 18

  19. Link Margin Calculations July, 2009 • TX Power: 20dBm • Noise floor: -114 dBm/MHz * 10*log(1.25MHz) = -113dBm • 4 dB noise figure & implementation loss (Assumed) Slide 19

  20. Conclusion July, 2009 Slide 20

  21. References July, 2009 Slide 21

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