IEEE g Submission Sangsung Choi & Cheolho Shin, ETRI Project: IEEE P 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: , Fax: l: Re: IEEE 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 P 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 P Slide 1 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g A Future Proof Platform in SUN: Performance Results of Option 1 in Scalable OFDM PHY. 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 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Slide 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
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Scalable OFDM PHY overview of modes simulated Slide 4 Frequency: TV white space –UHF (CH 14 ~ CH 51) : MHz / MHz 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 G 1,2 = [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 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g SUN Channel Using TV White Space Slide 5 July, 2009 Can use 4 SUN Channels per 1 TV Channel Can configure 4 piconets simultaneously.
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Tx Model for Scalable OFDM PHY Slide 6 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)
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Tx Model for Scalable OFDM PHY packet structure Slide 7 July, 2009 PreambleHeader STFLTF
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Tx Model for Scalable OFDM PHY Data rates in Option 1 Data rate (Kbps) ModulationCoding Rate (R) FDSTDS 98BPSK1/2YES 195BPSK1/2NOYES 391BPSK1/2NONo 781QPSK1/2NO FDS: Frequency-Domain Spreading TDS: Time-Domain Spreading Slide 8 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Tx Model for Scalable OFDM PHY Timing-related parameter ParameterDescriptionValue fsSampling frequency1250 KHz NFFTFFT Size128 ∆fSubcarrier frequency spacing KHz TFFTIFFT and FFT period102.4 us NCPNumber of samples in cyclic prefix32 TCPCyclic prefix duration in time25.6 us NSYMTotal Number of samples per symbol160 TSYMSymbol interval128 us Slide 9 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Tx Model for Scalable OFDM PHY Structure of OFDM Symbol Slide 10 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Tx Model for Scalable OFDM PHY FDS: Frequency-Domain Spreading TDS: Time-Domain Spreading Slide 11 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Tx Model for Scalable OFDM PHY 128 IFFT Total of 128 tones: 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 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Channel Model used Slide 13 Channel Models taken from ETSI ETSI EN V3.2.1 ( ) Propagation Model Tap Number Relative delay (us) Average relative power (dB) Rural Area (Rax)100 Typical Urban (Tux) Bad Urban (Bux) Hilly Terrain (HTx) July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Simulation Results – AWGN Slide 14 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Simulation Results – Typical Urban Slide 15 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Simulation Results – Bad Urban Slide 16 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Simulation Results – Hilly Terrain Slide 17 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Summary of Simulation Results Slide 18 July, 2009 Data-Rate (Kbps) AWGN 1KByte (dB) Typical Urban 1KByte (dB) Bad Urban 1KByte (dB) Hilly Terrain 1KByte (dB) Use 1,000 Packets for simulation SNRs for 10% Packet Error Rate
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Link Margin Calculations Slide 19 July, 2009 Data-Rate (Kbps) AWGN 1KByte (dB) Typical Urban 1KByte (dB) Bad Urban 1KByte (dB) Hilly Terrain 1KByte (dB) TX Power: 20dBm Noise floor: -114 dBm/MHz * 10*log(1.25MHz) = -113dBm 4 dB noise figure & implementation loss (Assumed)
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g Conclusion Slide 20 July, 2009
Submission Sangsung Choi & Cheolho Shin, ETRI IEEE g References Slide 21 July, 2009