1. May 2005 Patricia MARTIGNE doc.: IEEE 802. 15-05-0317-00-004a Submission Slide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: Status report on non-coherent ranging team activities Date Submitted: May, 16th 2005 Source: Patricia Martigne (responsible for the 802.15.4a sub-group on non-coherent ranging) Company: France Telecom R&D Address: 28 Chemin du Vieux Chêne – BP98 – 38243 Meylan Cedex - France Voice: +33 4 76 76 44 03 E-Mail: patricia.martigne@francetelecom.com Abstract: Companion document to doc 15-05-225r1 Purpose: This document is a presentation of the status report included in doc 15-05-225r1 on non- coherent ranging team activity. 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

2. May 2005 Patricia MARTIGNE doc.: IEEE 802. 15-05-0317-00-004a Submission Slide 2 Activities within non-coherent ranging team Need for creation of such a team appeared on the 11/04/2005 Ranging conference call 4 conference calls held (14/04 – 19/04 – 03/05 – 10/05) Technical discussions happened on : Leading edge detection importance for ranging Relevance of OOK in a non-coherent context Preamble Time Hopping Big or small pulse approach Peak voltage

3. May 2005 Patricia MARTIGNE doc.: IEEE 802. 15-05-0317-00-004a Submission Slide 3 Issues within non-coherent ranging team Leading edge detection needed for ranging to consider only energy detection receivers (integration resolution in the order of 2ns), not energy collection receivers (integration resolution of 50ns) to have only 1 pulse per chip, and not a burst of pulses to have the PRF as low as possible (according to FCC and CMOS limitations) 2 3 1

4. May 2005 Patricia MARTIGNE doc.: IEEE 802. 15-05-0317-00-004a Submission Slide 4 Issues within non-coherent ranging team Acquisition by non-coherent receivers preamble to be chosen carefully to ensure the acquisition process is performed in a timely manner (Vern's question on the 17th of May on feasibility for non-coherent receivers to perform ranging with a preamble being no longer than 4ms); may be accompanied by a TH coding Low complexity, low power consumption, and easy way of setting the threshold : OOK modulation seems to serve all of these purposes for non-coherent receivers 5 4

5. May 2005 Patricia MARTIGNE doc.: IEEE 802. 15-05-0317-00-004a Submission Slide 5 Issues within non-coherent ranging team Peak voltage limitation given by FCC rules (0dBm/50MHz) and CMOS 90nm technology (1,2Vpp) to be taken into account for decision on the minimum PRF value In line with Atlanta's technical agreement non-coherent receivers are to be fully considered : to allow to have only non-coherent receivers, TWR- TOA should be the preferred technique to perform ranging. 6 7

6. May 2005 Patricia MARTIGNE doc.: IEEE 802. 15-05-0317-00-004a Submission Slide 6 Current proposals for non-coherent ranging "Small pulse voltage" approach "Big pulse voltage" approach Complementary use of Time Hopping coding 1 2 3

7. May 2005 Patricia MARTIGNE doc.: IEEE 802. 15-05-0317-00-004a Submission Slide 7 Proposed work for Cairns Checking calculation of minimum PRF vs max peak voltage TH issue (with a view of isolation in SOP condition, smoothing the spectrum, having a time-signature for easier detection of leading edge detection by non-coherent receivers) Preamble issue Preferred bandwidth? (500MHz, 1GHz, 1.5GHz)

8. May 2005 Patricia MARTIGNE doc.: IEEE 802. 15-05-0317-00-004a Submission Slide 8 Proposed work between Cairns and San Francisco Needed clock? (with consideration of accuracy, time-drifts, cost) Continuation of discussions initiated in Cairns