1. July 2005
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Uncoordinated Deletion of Sub-Carriers in an MB-OFDM Link]
Date Submitted: [ 11 May, 2005]
Source: [C. Razzell] Company [Philips]
Address [1109, McKay Drive, San Jose, CA 95131, USA]
Voice: [ ], FAX: [],
+ [Chiara Cattaneo] Company [STMicroelectronics NV]
Address [39, Chemin du Champ-des-Filles, 1228 Geneva, Plan-les-Quates, Switzerland]
Voice: [ ], FAX: [],
Re: [MB-OFDM Spectrum Flexibility]
Abstract: [Simulated PER performance with uncoordinated sub-carrier erasures ]
Purpose: [Answer some “no” comments questioning the practicality of implementing sub-carrier deletion as an interference mitigation technique. This document provides an indication of the robustness of the receiver to deletion of sub-carriers]
Notice: This document has been prepared to assist the IEEE P 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
C. Razzell (Philips), C. Cattaneo (STM)

2. July 2005
Introduction
The following comments were received as part of the reason for not confirming MB-OFDM as the TG3a down-selections
No data have been presented on how "nulling" tones or OFDM symbols impacts link performance (especially at the critical rate of 480 Mbps for USB-type applications)
The following simulation results are intended to address this issue specifically.
C. Razzell (Philips), C. Cattaneo (STM)

3. Recap of MB-OFDM Spectrum Flexibility
July 2005
Recap of MB-OFDM Spectrum Flexibility
Ability to comply with worldwide regulations:
Channels and tones can be turned on/off dynamically to comply with changing regulations.
Can arbitrarily shape spectrum in software with a resolution of ~4 MHz.
C. Razzell (Philips), C. Cattaneo (STM)

4. CM1 PER performance @ 53.3Mbps
July 2005
CM1 PER 53.3Mbps
C. Razzell (Philips), C. Cattaneo (STM)

5. CM1 PER performance @ 200Mbps
July 2005
CM1 PER 200Mbps
C. Razzell (Philips), C. Cattaneo (STM)

6. CM1 PER performance @ 480Mbps
July 2005
CM1 PER 480Mbps
C. Razzell (Philips), C. Cattaneo (STM)

7. July 2005
Summary
Different numbers of adjacent sub-carriers were nulled {1,2,4,8 or 16}
The worst case, as expected was 480Mbps and 16 sub-carriers nulled
However, even with 16 x 4.125=66MHz of spectrum cut away, the required SNR increased by less than 1dB
C. Razzell (Philips), C. Cattaneo (STM)