1. Submission Title: [Preamble structures for 4a]
July, 2005
Project: IEEE P 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) ], FAX: [(256) ],
Re: [ a.]
Abstract: [Tweaking the basic preamble idea from 0456r1.]
Purpose: [To promote discussion in a.]
Notice: This document has been prepared to assist the IEEE P 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 P
Brethour, Time Domain

2. Nominal Preamble Structure from 0456-01
July, 2005
Nominal Preamble Structure from
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

3. 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

4. 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

5. 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