doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2005 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Status of CSS PHY Editing, Cairns, Thursday morning Date Submitted: [] Source: Rainer Hach Company: Nanotron Technologies Address: Alt-Moabit 61, 10555 Berlin, Germany Voice: +49 30 399 954 207 E-Mail: r.hach@nanotron.com Re: [] Abstract: [] Purpose: material to be discussed 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. Hach, Nanotron <author>, <company>

Where are we with the CSS PHY ? May 2005 Where are we with the CSS PHY ? We have a merged proposal (0126r01) which promises very good performance on long distance, robustness, mobility and power consumption We have a rough draft text for the chirp radio (285r00) which contains many blanks an has a preliminary outline From 285r00 we have presented the subchirp signals and sequences in time and frequency domain Hach, Nanotron

May 2005 What has to be done next ? Harmonize the outline of the draft document between UWB and CSS Clearify how to realize the low data rate A) Use different bit to symbol mapping (Reduction of biorthogonal code set) B) Use FEC Define PHY frame structure SHR (Synchronization header consisting of preambel and SFD) PHR (Phy Header) Investigate the usage of overlapping frequency bands for SOP operation (analysis and/or simulations) Define the usage of the 4 subchirp sequences which are available for code devision Evaluate the coexistence behaviour (analysis and/or simulations) Hach, Nanotron