Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

November, 2003

CRL-UWB ConsortiumSlide 1

doc.: IEEE 802.15-03-0455-00-003a

Submission

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)(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:[[email protected], [email protected]]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.

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

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

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

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 remarks5. Backup materials

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

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.

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

Soft-Spectrum Adaptation (SSA) 　

m1

0

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.

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

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).

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

Modified SSA pulse Modified SSA pulse

Exchangeable

Pow

er 　

Spe

ctru

m

31 2 4 5 6 7 8 9 10 11 f

5 GHz W-LAN

Dual- or three-band Multi-band or Multi-carrier

Harmonized with eachthrough

SSA-UWB modified pulse wavelets

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

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

3 4 5 6 7 8 9 10

frequency[GHz]

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

Regulatory frequency assignment by MPHPT, in Japan (almost no blank spectrum slot)

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

-80

-70

-60

-50

-40

dBm

/MH

z

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

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

0 20 40 60 80 100 120 140-1

-0.5

0

0.5

1

1.5

SSA-UWB optimized pulse wavelet generation

Time (samples)

Rel

ativ

e am

plitu

de

0 50 100 150 200 250 300-90

-80

-70

-60

-50

-40

-30

-20

-10

-0

Spectrum characteristics of SSA-UWB optimal pulse wavelet

Frequency (samples)

Rel

ativ

e am

plitu

de (

dB)

Modified SSA-UWB pulse wavelet with adaptive spectral notches achieving coexistence, flexibility

and efficient power transmission

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

0 50 100 150 200 250 300-200

-180

-160

-140

-120

-100

-80

-60

-40

-20

0


Frequency (samples)

Rel

ativ

e am

plitu

de (

dB)

Time (samples)0 20 40 60 80 100 120 140

-1

-0.5

0

0.5

1

1.5


Rel

ativ

e am

plitu

de


and efficient power transmission (Cont.)

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

0 20 40 60 80 100 120 140-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1


Time (samples)

Rel

ativ

e am

plitu

de


and efficient power transmission (Cont.)

0 50 100 150 200 250 300-160

-140

-120

-100

-80

-60

-40

-20

0


Frequency (samples)

Rel

ativ

e am

plitu

de (

dB)

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

SSA-UWB with more flexible pulse wavelet combination and more dynamic band plan extension

More flexible SSA wavelet

More dynamic band usage

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

0.96 1.61

1.99

3.1 10.6

GPS Band

Global harmonization and compliance utilizing modified SSA-UWB pulse wavelets

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

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.

November, 2003


doc.: IEEE 802.15-03-0455-00-003a

Submission

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.)

Documents

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)