1. doc.: IEEE 802.22-08/0104r0 Submission March 2008 Stephen Kuffner, MotorolaSlide 1 IEEE 802.22.1 Packet Error Rates for MSF1 and MSF2 IEEE P802.22 Wireless RANs Date: 2008-03-19 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 IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs 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 Chairhttp://standards.ieee.org/guides/bylaws/sb-bylaws.pdf Carl R. StevensonCarl 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.patcom@iee.org >

2. doc.: IEEE 802.22-08/0104r0 Submission March 2008 Stephen Kuffner, MotorolaSlide 2 Abstract This submission presents the simulated packet error rates for TG1 subframes MSF1 and MSF2 with packets structured according to P802.22.1 D2 [1], and considers the impact on the interference protection link margin

3. doc.: IEEE 802.22-08/0104r0 Submission March 2008 Stephen Kuffner, MotorolaSlide 3 Simulation Conditions One trial = one MAC subframe Channels are AWGN or WRAN-B No frequency offset or other impairments considered WRAN-B used fixed magnitude rays per [2] with uniform random phase draws per trial Unquantized soft decoding on MSF1 200 errors counted per chip SNR point –Should give 95% confidence that PER values are within about ±15% of actual value –i.e., 1% true PER will give between 0.87% to 1.15% simulated PER with 95% confidence

4. doc.: IEEE 802.22-08/0104r0 Submission March 2008 Stephen Kuffner, MotorolaSlide 4

5. doc.: IEEE 802.22-08/0104r0 Submission March 2008 Stephen Kuffner, MotorolaSlide 5 Results Summary PER MSF1 chip SNR (dB)MSF2 chip SNR (dB) AWGNWRAN-BAWGNWRAN-B 10%-3.82.33.59.5 1%-2.510.34.817.9

6. doc.: IEEE 802.22-08/0104r0 Submission March 2008 Stephen Kuffner, MotorolaSlide 6 Link Margin Considerations Express required chip SNR in terms of interference link and sensing link parameters [3] Assumptions: –P b = 250 mW, B bc = 77 kHz; P w = 4 W, B w = 5.625 MHz –Beacon ant. gain = 2 dBi; microphone Rx ant. gain = 2 dBi; WRAN sensing ant. gain = 0 dBi –maximum 200 kHz-averaged upfade on interference path F 2.5 dB for WRAN-B –ΔNF 0 dB, ΔG 0 dB, I/N max = 0 dB –Δ is propagation related parameter (next slide…) –6.6 + Δ – 2.5 = 4.1 dB + Δ > E c /N o

7. doc.: IEEE 802.22-08/0104r0 Submission March 2008 Stephen Kuffner, MotorolaSlide 7 Link Margin Results Antenna-height related path loss clutter parameter Δ [4] –P.1546 rural, 10 m beacon height: Δ = 16.8 dB 4.1 + 16.8 = 20.9 dB > E c /N o Both MSF1, MSF2 < 1% PER –Hata large city, 3 m beacon height: Δ = 2.7 dB 4.1 + 2.7 = 6.8 dB > E c /N o MSF1 PER = 3% MSF2 PER = 18.8%

8. doc.: IEEE 802.22-08/0104r0 Submission March 2008 Stephen Kuffner, MotorolaSlide 8 References [1] P802.22.1/D2, Part 22.1: Ehanced Protection for Low-Power, Licensed Devices Operating in Television Broadcast Bands, October 2007. [2] IEEE 802.22-05/0055r7, WRAN Channel Modeling, E. Sofer, G. Chouinard, September 2005. [3] IEEE 802.22-08/0059r0, Beacon Link Margin by Two Methods, S. Kuffner, February 2008. [4] IEEE 802.22-07/0148r0, TG1 Link Margin Calculator, S. Kuffner, March 2007.