April 19 doc.: IEEE 802.11-00/424r1 March 2006 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: SFD Recommendation. Date Submitted: March 8, 2006 Source: Vern Brethour, Time Domain Corp Contact: Vern Brethour, Time Domain Corp Voice: +1 256.536.9663, E-Mail: vern.brethour@timedomain.com; Re: TG4A Abstract: SFD recommendation from Francois Chin. Purpose: To capture the current position that Francois is holding. 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. Vern Brethour Stuart J. Kerry - Philips Semiconductors, Inc.

New e-mail from Francois’ clears up the confusion from this morning. March 2006 New e-mail from Francois’ clears up the confusion from this morning. Francois has small children. The man apparently never sleeps. He has already gotten back to us from the e-mail query we sent to him this morning! This presentation captures his (new) recommendation in a format suitable for voting. Vern Brethour

Francois’ new SFD Recommendation. March 2006 Francois’ new SFD Recommendation. Use Length-8 SFD (Francois’ original sequence #1) Extended SFD for 0.1Mbps Mode as an 8x symbol repetition. SFD for 0.8Mbps & higher Mode Preamble S … S -S -S -S -S Preamble SFD for 0.1Mbps Mode S … S -S … -S -S … -S … … … -S … -S 1st symbol repetition 2nd symbol repetition 8th symbol repetition Vern Brethour