Oct 2005 doc IEEE 802 15 0626 004

Oct 2005 doc. : IEEE 802. 15− 0626− 004 a Project: IEEE P 802. 15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Pulse-Repetition-Frequency-Considerations for TG 4 a ] 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. 4 a. ] Abstract: [Effects on pulse repetition frequency of bit rate, FEC rate and pulse amplitude] Purpose: [To promote discussion in 802. 15. 4 a. ] Notice: This document has been prepared to assist the IEEE P 802. 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 P 802. 15. Submission 1 Mc Laughlin, Decawave

Oct 2005 doc. : IEEE 802. 15− 0626− 004 a One Preamble Option e. g. 16 MHz Average PRF Data Preamble Peak Preamble PRF = ~ 31 MHz (actually 494/16) Peak Preamble PRF = 494 MHz Average Data PRF Average Preamble PRF ~ 16 MHz ( actually 494/31) 1 u. S => 16 pulses => every 1 u. S, 16 pulses This maintains same pulse amplitude for Preamble and Data Submission 2 Mc Laughlin, Decawave

Oct 2005 doc. : IEEE 802. 15− 0626− 004 a Resultant Burst Length (~16 MHz 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 Submission 3 Mc Laughlin, Decawave

Oct 2005 doc. : IEEE 802. 15− 0626− 004 a Resultant Burst Length (~4 MHz 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 Submission 4 Mc Laughlin, Decawave