Submission Title: [Preamble structures for 4a]

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Presentation transcript:

Submission Title: [Preamble structures for 4a] July, 2005 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Preamble structures for 4a] Date Submitted: [21 July, 2005] Source: [Vern Brethour] Company [Time Domain Corp.] Address [7057 Old Madison Pike; Suite 250; Huntsville, Alabama 35806; USA] Voice:[(256) 428-6331], FAX: [(256) 922-0387], E-Mail: [vern.brethour@timedomain.com] Re: [802.15.4a.] Abstract: [Tweaking the basic preamble idea from 0456r1.] Purpose: [To promote discussion in 802.15.4a.] 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. Brethour, Time Domain

Nominal Preamble Structure from 0456-01 July, 2005 Nominal Preamble Structure from 0456-01 Preamble Header Payload SYNC SFD CE S S S S S S -S -S S S S S or -S -S -S S S S -S -S S S S S SYNC : Synchronization Field SFD : Start Frame Delimiter Field CE : Channel Estimation Filed Brethour, Time Domain

Preferred structure Put the delimiter last July, 2005 Preferred structure CE field -S -S -S S S S -S -S S S S S -S -S -S S S S S S S S -S -S CE field Put the delimiter last Better for channel sounding. Brethour, Time Domain

Preferred structure Reorder the symbols in the delimiter July, 2005 Preferred structure -S -S -S S S S S S S S -S -S -S -S -S S S S S S S S -S -S Reorder the symbols in the delimiter Better for the coherent receiver’s tracking loop. Brethour, Time Domain

July, 2005 How Much Delimiter? 500 us preamble -S -S S S S S S -S -S 1 ms preamble -S -S S S S S S -S -S -S -S Delimiter must be appropriately scaled with preamble length. Brethour, Time Domain