Date Submitted: [26-Oct-2005] Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Pulse-Repetition-Frequency-Considerations for TG4a ] Date Submitted: [26-Oct-2005] Source: [Michael Mc Laughlin] Company [Decawave Ltd.] Address [25 Meadowfield, Sandyford, Dublin 18, Ireland] Voice:[+353−1−2954937 ], FAX: [What’s a FAX?], E−Mail: [michael@decawave.com] Re: [802.15.4a.] Abstract: [Effects on pulse repetition frequency of bit rate, FEC rate and pulse amplitude] 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. Mc Laughlin, Decawave

One Preamble Option e.g. 16MHz Average PRF Oct 2005 One Preamble Option e.g. 16MHz Average PRF Preamble Data Peak Preamble PRF = ~ 31 MHz (actually 494/16) Peak Preamble PRF = 494 MHz Average Data PRF ~ 16 MHz 1uS => 16 pulses Average Preamble PRF ~ 16 MHz ( actually 494/31) => every 1uS, 16 pulses This maintains same pulse amplitude for Preamble and Data Mc Laughlin, Decawave

Burst Length for 1Mbps (~16MHz PRF average) Oct 2005 Burst Length for 1Mbps (~16MHz PRF average) The longer the burst, the more noise a non-coherent receiver must “let in”. Note: The above is an excel spreadsheet so you can play around with the numbers Mc Laughlin, Decawave

Burst Length for 1Mbps (~4MHz PRF average) Oct 2005 Burst Length for 1Mbps (~4MHz PRF average) The longer the burst, the more noise a non-coherent receiver must “let in”. Note: The above is an excel spreadsheet so you can play around with the numbers Mc Laughlin, Decawave

Burst Length with Increased Bitrate (~16MHz PRF average) Oct 2005 Burst Length with Increased Bitrate (~16MHz PRF average) The longer the burst, the more noise a non-coherent receiver must “let in”. Note: The above is an excel spreadsheet so you can play around with the numbers Mc Laughlin, Decawave

Burst Length with Increased Bitrate (~4MHz PRF average) Oct 2005 Burst Length with Increased Bitrate (~4MHz PRF average) The longer the burst, the more noise a non-coherent receiver must “let in”. Note: The above is an excel spreadsheet so you can play around with the numbers Mc Laughlin, Decawave