1. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Modified pulse shapes based on SSA for interference mitigation and systems coexistence] Date Submitted: [November 10, 2003] Source: [Honggang Zhang, Ryuji Kohno ] Company [ (1) Communications Research Laboratory (CRL), (2) CRL-UWB Consortium ] Address [3-4, Hikarino-oka, Yokosuka, 239-0847, Japan] Voice:[+81-468-47-5101], FAX: [+81-468-47-5431], E-Mail:[honggang@crl.go.jp, kohno@crl.go.jp] Re: [IEEE P802.15 Alternative PHY Call For Proposals, IEEE P802.15-02/327r7] Abstract:[Various modifications of previously proposed SSA-UWB pulse wavelets are described, in order to realize global harmonization and compliance considering co-existence, interference avoidance, matching with regulatory spectral mask, and high data rate.] Purpose:[For investigating the interference mitigation and global co-existence between UWB and various other narrowband systems, based on the modified SSA pulse waveform shapes.] 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.

2. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 2 Modified Pulse Shapes Based on SSA for Interference Mitigation and Systems Coexistence Honggang ZHANG †, Ryuji KOHNO †‡ † Communications Research Laboratory(CRL) & CRL-UWB Consortium ‡ Yokohama National University

3. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 3 Outline of presentation 1.Summary of previously proposed SSA-UWB pulse waveforms 2.Description of existing radio systems in Japan 3.Modified pulse shapes for interference mitigation and global system coexistence 4.Conclusion remarks 5.Backup materials

4. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 4 SSA-UWB for global harmonization and compliance  Global harmonization and compliance is the everlasting aim and basic philosophy of CRL- UWB Consortium.  CRL’s SSA-UWB scheme has a wide capability to be harmonized with all the present or future UWB systems and co-exist with various narrowband radio systems.  Just changing the kernel functions and shapes of SSA-UWB pulse wavelets to achieve smooth version-up.

5. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 5 Soft-Spectrum Adaptation (SSA) SSA-UWB philosophy  Design a proper pulse wavelet with high frequency efficiency corresponding to any regulatory frequency mask.  Adjust transmitted signal’s spectra adaptively, so as to minimize interference with co-existing systems.

6. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 6 Features of SSA-UWB  SSA-UWB with flexible pulse waveform and frequency band can be applied to single and multiband/multi-carrier UWB by  Free-verse type pulse waveform shaping and  Geometrical type pulse waveform shaping, respectively.  Interference avoidance for co-existence, harmonization for various systems, and global implementation can be realized.  SSA-UWB can flexibly adjust UWB signal spectrum so as to match with spectral restriction in transmission power, i.e. spectral masks in both cases of single and multiple bands.  Scalable, adaptive performance improvement.  Smooth system version-up similar to Software Defined Radio (SDR).

7. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 7 Modified SSA pulse Exchangeable Power Spectrum 3 1 2 456 7 891011 f 5 GHz W-LAN Dual- or three-bandMulti-band or Multi-carrier Harmonized with each through SSA-UWB modified pulse wavelets

8. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 8 Fixed Microwave Communication System Already-deployed radio systems in Japan Broadcasting System DSRC (Dedicated Short Range Communication) Radar System Satellite Communication System Amateur Radio WLAN and FWA Radio Astronomy 345678910 frequency [GHz]

9. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 9 Regulatory frequency assignment by MPHPT, in Japan (almost no blank spectrum slot)

10. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 10 dBm/MHz Radio emission prohibitionRadio Astronomy protection 5GHz 10GHz1GHz Coexistence and compliance between the optimized SSA-UWB system and the existing radio systems with respect to the prohibited and inhibited band assignment in Japan

11. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 11 020406080100120140 -0.5 0 0.5 1 1.5 SSA-UWB optimized pulse wavelet generation Time (samples) Relative amplitude 050100150200250300 -90 -80 -70 -60 -50 -40 -30 -20 -10 -0 Spectrum characteristics of SSA-UWB optimal pulse wavelet Frequency (samples) Relative amplitude (dB) Modified SSA-UWB pulse wavelet with adaptive spectral notches achieving coexistence, flexibility and efficient power transmission

12. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 12 050100150200250300 -200 -180 -160 -140 -120 -100 -80 -60 -40 -20 0 Spectrum characteristics of SSA-UWB optimal pulse wavelet Frequency (samples) Relative amplitude (dB) Time (samples) 020406080100120140 -0.5 0 0.5 1 1.5 SSA-UWB optimized pulse wavelet generation Relative amplitude Modified SSA-UWB pulse wavelet with adaptive spectral notches achieving coexistence, flexibility and efficient power transmission (Cont.)

13. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 13 0 20406080100120140 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 SSA-UWB optimized pulse wavelet generation Time (samples) Relative amplitude Modified SSA-UWB pulse wavelet with adaptive spectral notches achieving coexistence, flexibility and efficient power transmission (Cont.) 050100150200250300 -160 -140 -120 -100 -80 -60 -40 -20 0 Spectrum characteristics of SSA-UWB optimal pulse wavelet Frequency (samples) Relative amplitude (dB)

14. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 14 SSA-UWB with more flexible pulse wavelet combination and more dynamic band plan extension More flexible SSA wavelet More dynamic band usage

15. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 15 0.96 1.61 1.99 3.110.6 GPS Band Global harmonization and compliance utilizing modified SSA-UWB pulse wavelets

16. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 16 Conclusion remarks  We has proposed the modified SSA-UWB pulse wavelets with dynamic pulse shaping and adaptive configuration.  SSA-UWB with flexible, dynamic pulse waveform shaping can satisfy the FCC spectral mask and other regional regulations around the world.  SSA-UWB can be applied to avoid possible interferences with other existing narrowband radio systems.  Scalable and adaptive performance improvement with multi-mode and multi-rate can be further expected by utilizing the modified SSA-UWB pulse wavelets.

17. doc.: IEEE 802.15-03-0455-00-003a Submission November, 2003 CRL-UWB ConsortiumSlide 17  A SSA-UWB transmitter can use any kind of pulse wavelet, as long as the pulse used has a correlation within 3 dB of the reference RRC pulse in different pulse generation scheme.  This will allow manufacturers to design and use the transmitting pulse shapes to achieve either higher performance or higher levels of protection for specific bands or services (e.g. Japanese Radio Astronomy bands).  We can design receiving architectures such that transmitters and receivers from different manufacturers and even different regions will interoperate with minimal loss in performance.  Device pairs from the same or cooperating manufacturers could be further designed to optimize performance with each other. Conclusion remarks (Cont.)