Date Submitted: [21 April 2005] Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Relationship between PRF and peak level in a UWB IR system] Date Submitted: [21 April 2005] Source: [Saeid Safavi, Wideband Access Inc.] Contact: Saeid Safavi. Voice:[+1 858 642 9114, E-Mail: ssafavi@widebandaccess.com] Abstract: [Minimum required PRF for CMOS DS-UWB radios] Purpose: [Clarification of relationship between minimum PRF and maximum allowed voltage level in UWB IR] 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. TG4a

Assumptions IR-UWB with BPSK Modulation Fc = 4056 MHz (26x156) Chip rate = Fc/3 = 1352 Mcps CMOS 90 nm technology voltage with a voltage swing of: 1 V internal (0.5 peak) 2.5 V I/O (1.25 peak) Note: TG4a

Minimum PRF Requirements VPeak TC PRI TChip (nsec) 0.74 BW (GHz) 1.35 VPeak (v) 1.25 0.5 PAve (dBm) -9.99023 PPeak (dBm) 11.9382 3.9794 PRF (MHz) @ VPeak 8.672281 54.20176 TG4a