doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> July, 2005 Project: IEEE 802.15 Study Group for Wireless Personal Area Networks (WPANs) Submission Title: [Channel Model Usage in TG4a] Date Submitted: [July 2005] Source: [Ismail Lakkis, Shahriar Emami and Michael McLaughlin]: Company [Wideband Access Inc, Freescale Semiconductor, and Decawave] Address [Wideband Access, Inc. 10225 Barnes Canyon Rd, #A209 San Diego, CA] Address [Freescale Semiconductor, Inc. 6100 Broken Sound Pkwy., N.W. Suite 1 Boca Raton, FL  33487-2790] Address [Decawave] Re: [802.15.4a] Abstract: [Channel Model Usage in TG4a] Purpose: [To assist the simulation of different multipath environments] 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. I. Lakkis, S. Emami, & M. McLaughlin <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> July, 2005 TG4a Channel RF channel is centered @ 6GHz Complex BB (baseband) channel: DC corresponds to 6GHz How do we model the baseband equivalent of the channel at 4 GHz (mandatory band)? Generate a realization of the channel as given in the channel model Up-convert the channel by 2 GHz Filter it with a baseband low-pass filter of approximate bandwidth of 500 MHz Decimate the channel down to the appropriate sampling frequency I. Lakkis, S. Emami, & M. McLaughlin <author>, <company>

Baseband Channel Modeling July, 2005 Baseband Channel Modeling -4 GHz 0 GHz -2 GHz 4 GHz 4 GHz 8 GHz f RF fBB LPF N I. Lakkis, S. Emami, & M. McLaughlin

Simulations Assumption One wrong way July, 2005 Simulations Assumption One wrong way -4 GHz 0 GHz -2 GHz 4 GHz 4 GHz 8 GHz f RF fBB BPF N FSL proposed transmission scheme was simulated. Receiver did not deploy rake receiver. Eb/No was set to 15 dB. BER for all CM1 and CM8 samples were computed. I. Lakkis, S. Emami, & M. McLaughlin

CDF of Receiver BER in CM1 July, 2005 CDF of Receiver BER in CM1 I. Lakkis, S. Emami, & M. McLaughlin

CDF of Receiver BER in CM8 July, 2005 CDF of Receiver BER in CM8 I. Lakkis, S. Emami, & M. McLaughlin

July, 2005 Summary Based on these limited simulations, performance appears to be worse if upconversion is eliminated The BER performance appears worse by a fudge factor. The fudge factor for BER (even in CM8) seems to be less than two. If fudge factor is less than two, the discrepancy between BER plots should be limited to a dB. I. Lakkis, S. Emami, & M. McLaughlin