1. doc.: IEEE 802.15-02/403 SG3a Submission Marcus Pendergrass Time Domain Corporation (TDC) September 2002 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Average Power Decay Profiles for a Set of Measurement Data Date Submitted: 12 September, 2002 Source: Marcus Pendergrass, Time Domain Corporation 7057 Old Madison Pike, Huntsville, AL 35806 Voice:256-428-6344 FAX: [256-922-0387], E-Mail: Marcus.Pendergrass@timedomain.com Re: Ultra-wideband Channel Models IEEE P802.15-02/208r0-SG3a, 17 April, 2002, Abstract:Average power decay profiles for a set of measurement data are presented. Purpose:The information provided in this document is for consideration in the selection of a UWB channel model to be used for evaluating the performance of a high rate UWB PHY for WPANs. 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. doc.: IEEE 802.15-02/403 SG3a Submission Marcus Pendergrass Time Domain Corporation (TDC) September 2002 Average Power Decay Profiles for a Set of Measurement Data 12 September 2002 Marcus Pendergrass marcus.pendergrass@timedomain.com References http://grouper.ieee.org/groups/802/15/pub/2002/Jul02/02240r1p802-15_SG3a-Empirically_Based_UWB_Channel_Model.ppt http://grouper.ieee.org/groups/802/15/pub/2002/Jul02/02294r0p802-15_SG3a-Empirically_Based_Statistical_Ultra-Wideband_Channel_Model.ppt Channel model submission, July 2002, Vancouver BC Channel model presentation, July 2002, Vancouver BC Slide 2

3. doc.: IEEE 802.15-02/403 SG3a Submission Marcus Pendergrass Time Domain Corporation (TDC) September 2002 Mean of Log Relative Magnitude comparison across scenarios NLOS LOS 4 – 10 m 0 – 4 m NLOS 0 – 4 m See the notes page to this slide for linear fits to these graphs Case I: Case II:Case III: Some didnt like these units at the Vancouver meeting Slide 3

4. doc.: IEEE 802.15-02/403 SG3a Submission Marcus Pendergrass Time Domain Corporation (TDC) September 2002 Conversion from Mean of Log Relative Magnitude to APDP in dB Average Power Decay Profile (as a function of excess delay ) What I plotted in my presentation What I think people wanted to see The conversion: Slide 4

5. doc.: IEEE 802.15-02/403 SG3a Submission Marcus Pendergrass Time Domain Corporation (TDC) September 2002 Case I: NLOS, 0-4 meters Piecewise Linear fit to APDP: z ( ) = -0.085 - 9.410if > 5 z ( ) = -0.587 - 7.373if 0 < < 5 Case II: LOS, 0-4 meters Piecewise Linear fit to APDP: z ( ) = -0.092 - 12.536if > 8 z ( ) = -1.884 - 5.781if 0 < < 8 Case III: NLOS, 4-10 meters Linear fit to APDP: z ( ) = -0.085 - 10.279 Linear Fits to APDP (dB) The equations below give linear fits to the graphs on the slide 1, after the conversion to dB has been made Slide 5