a Slide 1 Michael Mc Laughlin, decaWave Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Options for a Common Signalling Protocol] Date Submitted: [22 February 2004] Source: [Michael Mc Laughlin] Company [decaWave Ltd.] Voice:[ ], Re: [ Ad hoc TG3a compromise meeting submission ] Abstract:[This contribution explores some possibilities for a common signalling protocol which would allow a DS-UWB transmitter and receiver communicate with an MB-OFDM transmitter and receiver without adding significant cost to either one] Purpose:[To promote compromise for TG3a PHY selection..] Notice:This document has been prepared to assist the IEEE 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

a Slide 2 Michael Mc Laughlin, decaWave Example Piconet Dual mode DEV MB-OFDM DEV DS-UWB DEV MB-OFDM link DS-UWB link CSP link DS-UWB link MB-OFDM link

a Slide 3 Michael Mc Laughlin, decaWave Common Signalling Protocol Possibilities DS-UWB and MB-OFDM have a lot in common –MAC –Scrambler –FEC –Overall RF Bandwidth Want ~zero added cost for CSP Want bitrates as high as possible for CSP

a Slide 4 Michael Mc Laughlin, decaWave CSP bandwidth choice Bandwidth compatible with both DS-UWB and MB-OFDM receivers –Antenna –LNA –Tx/Rx Filters –ADC –DAC/Pulse generator => Use one of the 3 MB-OFDM bands Centre one, 3.96GHz, eases filtering requirements

a Slide 5 Michael Mc Laughlin, decaWave FEC choice Propose two FEC modes –R=1/2, K=7 for robust signalling Both proposals already have this ~10Mbps for BPSK Link margin better than current 110Mbps –FECless mode for shorter range, higher rate ~20Mbps for BPSK Link Margin similar to current 200Mbps

a Slide 6 Michael Mc Laughlin, decaWave QPSK mode ? Propose –Mandatory BPSK CSP mode Robust Simple receiver –Consider an optional QPSK CSP mode 2 x data rate for 3dBs of Link Margin Both proposals already have QPSK modes Would require more precise training