[The Progresses on the TPC simulations] March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 [The Progresses on the TPC simulations] IEEE P802.22 Wireless RANs Date: 2008-03-14 Authors: Notice: This document has been prepared to assist IEEE 802.22. 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 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 802.22. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures http://standards.ieee.org/guides/bylaws/sb-bylaws.pdf including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair Carl R. Stevenson as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.22 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at patcom@iee.org. Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 Abstract This presentation is to explain the progresses on the TPC (Transmit Power Control) simulations. We have discussed the issues on the TPC simulations since the January 2008. This presentation is an interim results including as follows, Simulation configurations Updates of ETRI’s simulator Comparisons of normalized C/N in AWGN channel Future works Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

Simulation Configurations March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 Simulation Configurations Representative of WRAN channel: profile B Rayleigh fading: Constant amplitude and phase within a frame Variable or constant amplitude, variable phase between a frame FEC: convolutional coding FEC block size: Determined by concatenation rule Burst size (n): 1800 Bytes (QPSK), 3600 Bytes (16QAM), 5400 Bytes (64QAM) Occupy at least 6 OFDM symbols for different modulation and code rate Reference performance: BER=10-6 (to be confirmed) Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

Updates of ETRI’s Simulator March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 Updates of ETRI’s Simulator Subcarrier and bit interleaver The interleaving parameters for all block size need to be defined Waiting for the reply from France Telecom Concatenation rule The block size is different depending the modulation and FEC rate Modification of Rayleigh fading simulator Similar to DVB-T channel environments Data to burst mapping Downstream data is allocated using linear-vertical scheme Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 EICTA MBRAI 2.0 It is Mobile and Portable DVB-T/H Radio Access Interface Specification There is a meaning in that the center frequency and bandwidth are identical with WRAN system C/N performances for various channel Gaussian channel DVB-T Rayleigh channel (P1) Portable indoor and outdoor channel (PI and PO) Mobile channel (TU6) Reference BER=2*10-4 after the Viterbi decoder This BER corresponds to the DVB-T standard defined quasi error free (QEF) QEF means “less than one uncorrelated error event per hour”, corresponding to BER=10-11 after the RS decoder Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

DVB-T C/N (dB) in AWGN Channel March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 DVB-T C/N (dB) in AWGN Channel The C/N values are calculated using the theoretical C/N figures added by an implementation margin as follows, 1.1 dB for QPSK 1.3 dB for 16QAM 1.5 dB for 64QAM Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

DVB-T C/N (dB) in Terrestrial Channel March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 DVB-T C/N (dB) in Terrestrial Channel DVB-T Specified Terrestrial Channel The channel does not include any Doppler, i.e. it is a snapshot of a real time variant Rayleigh channel Implementation Margin 1.6 dB for QPSK 1.8 dB for 16QAM 2.0 dB for 64QAM Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

Coded Bit Error Rate (BER) in AWGN (1) March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 Coded Bit Error Rate (BER) in AWGN (1) Reference BER Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

Coded Bit Error Rate (BER) in AWGN (2) March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 Coded Bit Error Rate (BER) in AWGN (2) Reference BER Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

Coded Bit Error Rate (BER) in WRAN-B March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 Coded Bit Error Rate (BER) in WRAN-B In progress Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

Comparisons of Normalized C/N March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 Comparisons of Normalized C/N Modulation and FEC rate ACK region Fast feedback IE CDMA code QPSK - 1/2 QPSK - 2/3 QPSK - 3/4 QPSK - 5/6 16QAM - 1/2 16QAM - 2/3 16QAM – 3/4 16QAM – 5/6 64QAM – 1/2 64QAM - 2/3 64QAM - 3/4 64QAM – 5/6 Normalized C/N (802.16e, Ped-B1)) -3 3 6 7.5 9 NA 12 14.5 15 17.5 18 20 21 23 Normalized C/N (DVB-T, AWGN) NA 4.6 6.4 7.4 10.6 12.7 14.0 15.4 18.3 19.9 Normalized C/N (ETRI, AWGN) TBD 3.2+1.1=4.3 6.0+1.1=7.1 8.9+1.3=10.2 11.1+1.3=12.4 12.2+1.3=13.5 13.5+1.3=14.8 14.1+1.5=15.6 Normalized C/N (DVB-T, P12)) TBD Normalized C/N (ETRI, WRAN-B) In progress 1) To be confirmed, 2) P1: DVB-T Rayleigh channel Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

Future Works Additional Simulations Reference BER for WRAN TPC March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 Future Works Additional Simulations To find the C/N in WRAN-B channel To compare this value with the C/N in DVB-T or 802.16e Reference BER for WRAN TPC Dislike the DVB-T, 802.22 does not use the RS code Then, what is the reasonable reference BER performance? Verification of TPC operation using Normalized C/N Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI

March 2007 doc.: IEEE 802.22-08-0080-01-0000 March 2008 References EICTA MBARI 2.0, Mobile and portable DVB-T/H Radio Access – Part 1: Interface specification, June 2007. ETSI EN 300 744, Digital video broadcasting (DVB); Framing structure, channel coding and modulation for digital terrestrial television, v1.5.1, June 2004. Chang-Joo Kim, ETRI Chang-Joo Kim, ETRI