1. November, 2003
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Modified pulse shapes based on SSA for interference mitigation and systems coexistence (update)]
Date Submitted: [November 13, 2003]
Source: [Honggang Zhang, Ryuji Kohno ] Company [ (1) Communications Research Laboratory (CRL), (2) CRL-UWB Consortium ]
Address [3-4, Hikarino-oka, Yokosuka, , Japan]
Voice:[ ], FAX: [ ],
Re: [IEEE P Alternative PHY Call For Proposals, IEEE P /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 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
CRL-UWB Consortium

2. November, 2003
Modified Pulse Shapes Based on SSA for Interference Mitigation and Systems Coexistence (Update)
Honggang ZHANG †, Ryuji KOHNO †‡
† Communications Research Laboratory(CRL)
& CRL-UWB Consortium
‡ Yokohama National University
CRL-UWB Consortium

3. Outline of presentation
November, 2003
Outline of presentation
Summary of previously proposed SSA-UWB pulse waveforms
Description of existing radio systems in Japan
Modified pulse shapes for interference mitigation and global system coexistence　
Conclusion remarks
Backup materials
CRL-UWB Consortium

4. SSA-UWB for global harmonization and compliance
November, 2003
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.
CRL-UWB Consortium

5. November, 2003
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.
Soft-Spectrum Adaptation (SSA)
CRL-UWB Consortium

6. November, 2003
Features of SSA-UWB
SSA-UWB with flexible pulse waveform and frequency band can be applied to single and multi-band/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).
CRL-UWB Consortium

7. Multi-band or Multi-carrier
November, 2003
Modified SSA pulse
Exchangeable
Power 　Spectrum 3 1 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 each
through
SSA-UWB modified pulse wavelets
CRL-UWB Consortium

8. Already-deployed radio systems in Japan
November, 2003
Already-deployed radio systems in Japan 3 4 5 6 7 8 9 10
frequency
[GHz]
Fixed Microwave Communication System
Broadcasting System
DSRC (Dedicated Short Range Communication)
Radar System
Satellite Communication System
Amateur Radio
WLAN and FWA
Radio Astronomy
CRL-UWB Consortium

9. Regulatory frequency assignment by MPHPT,
November, 2003
Regulatory frequency assignment by MPHPT,
in Japan (almost no blank spectrum slot)
Victim services
CRL-UWB Consortium

10. November, 2003
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
dBm/MHz
Radio emission prohibition
Radio Astronomy protection
5GHz
10GHz
1GHz
CRL-UWB Consortium

11. November, 2003
There are other interference-sensitive radio systems that have been in services, such as the Fixed satellite and Broadcasting services in Japan as well as around the world.
5GHz
10GHz
1GHz
dBm/MHz
Broadcast Auxiliary Service
Fixed Satellite Service
575MHz
200MHz
CRL-UWB Consortium

12. November, 2003
Interference to Fixed satellite and Broadcasting services should be paid more attentions as well
SSA-UWB is an available solution: optimized the pulse wavelet itself and making the notches with adaptive, flexible deepness and width.
CRL-UWB Consortium

13. November, 2003
Modified SSA-UWB pulse wavelet with adaptive spectral notches achieving coexistence, flexibility and efficient power transmission 20 40 60 80
100
120
140 -1
-0.5
0.5 1
1.5
SSA-UWB optimized pulse wavelet generation
Time (samples)
Relative amplitude 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)
Relative amplitude (dB)
CRL-UWB Consortium

14. November, 2003
Modified SSA-UWB pulse wavelet with adaptive spectral notches achieving coexistence, flexibility and efficient power transmission (Cont.) 20 40 60 80
100
120
140 -1
-0.5
0.5 1
1.5
SSA-UWB optimized pulse wavelet generation
Relative amplitude 50
100
150
200
250
300
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
Spectrum characteristics of SSA-UWB optimal pulse wavelet
Frequency (samples)
Relative amplitude (dB)
Time (samples)
CRL-UWB Consortium

15. November, 2003
Modified SSA-UWB pulse wavelet with adaptive spectral notches achieving coexistence, flexibility and efficient power transmission (Cont.) 20 40 60 80
100
120
140
-0.6
-0.4
-0.2
0.2
0.4
0.6
0.8 1
SSA-UWB optimized pulse wavelet generation
Time (samples)
Relative amplitude 50
100
150
200
250
300
-160
-140
-120
-100
-80
-60
-40
-20
Spectrum characteristics of SSA-UWB optimal pulse wavelet
Frequency (samples)
Relative amplitude (dB)
CRL-UWB Consortium

16. November, 2003
SSA-UWB with more flexible pulse wavelet combination and more dynamic band plan extension
More flexible SSA wavelet
More dynamic band usage
CRL-UWB Consortium

17. November, 2003
Global harmonization and compliance utilizing modified SSA-UWB pulse wavelets
0.96
1.61
1.99
3.1
10.6
GPS Band
CRL-UWB Consortium

18. November, 2003
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.
CRL-UWB Consortium

19. Conclusion remarks (Cont.)
November, 2003
Conclusion remarks (Cont.)
A SSA-UWB transmitter can use any kind of pulse wavelet, as long as the pulse used has a correlation with less than 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 co-operating manufacturers could be further designed to optimize performance with each other.
CRL-UWB Consortium

20. Japanese Contributions on Measurements of UWB Signals for ITU TG1/8
November, 2003
Japanese Contributions on Measurements of UWB Signals for ITU TG1/8
Japanese Regulator (MPHPT) has been investigating mutual interference between UWB and victim systems.
Some results on measurements of UWB signals have been presented at ITU TG1/8.
This is important for a regulator to approve type of UWB systems. Regulators in ITU Region 3 (Korea, China,
Singapore, etc in Asia) may be mostly same situation.
Communications Research Laboratory (CRL), JAPAN
CRL-UWB Consortium

21. 1. CONCERNING RADIATED MEASUREMENTS IN REVERBERATION CHAMBER
November, 2003
1. CONCERNING RADIATED MEASUREMENTS IN REVERBERATION CHAMBER
ITU Document 1-8/44-E
Introduction
A reverberation chamber can be used not only for the emission and immunity tests of an electric equipment, but also for the measurement of the radiated power emitted by wireless equipment with antenna. The objective of this contribution is to present a measurement method for the radiated power and its performance limit. The document shows the measurement method for the radiated power from a wireless apparatus is based on the CISPR 16-1 publication.
CRL-UWB Consortium

22. November, 2003
2. CONCERING LIMITAION AND EXTENSION OF FREQUENCY DOMAIN MEASUREMENTS USING CONVENTIONAL SPECTRUM ANALYZER
Introduction
The permitted EIRP level of UWB devices is very low in the frequency range of 1-2 GHz bands used by GPS and cellular phone. Therefore, it is difficult to measure it by using a commercial spectrum analyzer. In order to measure such a low level of EIRP, it is best to use a radiometer. The radiometer can measure the EIRP of EUT, in transmitting state, and the background of EIRP. After subtracting the latter from the former, only the objective value of EIRP can be measured properly. This contribution document describe about the problem of EIRP measurement by using only spectrum analyzer. It is also explaining the construction of radiometer which consists of a spectrum analyzer and a low noise amplifier (LNA). After that, the noise floor and the standard deviation of measurement error are shown.
ITU Document 1-8/45-E
CRL-UWB Consortium

23. 3. CONCERNING METHOD OF PEAK POWER MEASUREMENTS
November, 2003
3. CONCERNING METHOD OF PEAK POWER MEASUREMENTS
ITU Document 1-8/46-E
Introduction
This document describes a peak power measurement method. The method uses equipment which combines a spectrum analyzer with an oscilloscope. Section 3 is explaining the technical requirement for spectrum analyzers. The video bandwidth (VBW) should be over the three times of resolution bandwidth (RBW). The linear phase property is preferable for Gaussian filter. Section 4 provides a peak power measurement method. Proposed method uses equipment which combines a spectrum analyzer with an oscilloscope. Section 5 presents requirements for the proposed equipment.
CRL-UWB Consortium

24. 4. CONCERNING PEAK POWER MEASUREMENT BY USING A SPECTRUM ANALYZER
November, 2003
4. CONCERNING PEAK POWER MEASUREMENT BY USING A SPECTRUM ANALYZER
ITU Document 1-8/47-E
Introduction
The CISPR16-1 publication defines the use of spectrum analyzers for EMI measurements in the frequency range above 1GHz. Spectrum analyzers are usually calibrated for sinusoidal inputs to yield accurate results. However, they are not guaranteed to yield reproducible results for other type of inputs such as an impulse waveform generated by an UWB apparatus. It is necessary to know the response of an impulse waveform. The objective of this contribution is to present the impulse response of spectrum analyzers defined in CISPR 16-1.
CRL-UWB Consortium

25. November, 2003
5. CONCERNING EMISSION MASK MEASUREMENTS USING A SPECTRUM ANALYZER FOR UWB EQUIPMENT WITH AN INTERNAL ANTENNA CONNECTOR
ITU Document 1-8/48-E
Introduction
This document is proposed that, the emission mask of UWB wireless equipment with an internal antenna connector can be measured only with use of a spectrum analyzer. It is assumed that the antenna gain of measured device is 0dBi. Also this document considered the noise floor and the saturation of the front-end part, while being measured at 2GHz or below by a general purpose spectrum analyzer.
CRL-UWB Consortium

26. 6. CONCERNING TIME DOMAIN MEASUREMENTS BY USING OSCILLOSCOPES
November, 2003
6. CONCERNING TIME DOMAIN MEASUREMENTS BY USING OSCILLOSCOPES
ITU Document 1-8/49-E
Introduction
The objective of this contribution is to describe the specifications of an oscilloscope, such as dynamic range and bandwidth, when UWB signals are measured by the apparatus in time domain. The document also mentions some important considerations in measurement.
CRL-UWB Consortium

27. 7. CONSIDERATION OF MEASURMENT OF UWB FH SYSTEM
November, 2003
7. CONSIDERATION OF MEASURMENT OF UWB FH SYSTEM
ITU Document 1-8/50-E
Introduction
For measurement of the mean power of frequency hopping in Ultra-Wideband (UWB) radio system, it is required to study and establish measuring method for every hopping method. This contribution describes the envisioned hopping methods and brings up some issues on measuring methods.
CRL-UWB Consortium

28. November, 2003
Conclusion remarks
Regulators in ITU Region3 (Asia including Korea, China Singapore and Japan) have been investigating UWB interference into victim systems similar to European CEPT and FCC.
However, the investigation has not been still sufficient yet. Model of UWB signals are still too simple like PPM signal pulse-like or noise-like. We need more realistic modeling like MB-OFDM and DS-CDMA types etc.
One of the most important issues for commercial UWB products is TYPE-APPROVAL.
As far as UWB interference using more realistic models and methods of type-approval have not been well investigated, TG3a should keep investigating them together with ITU, regional regulators and TBS’s.
CRL-UWB Consortium