Proposal Update for IEEE 802.15.3-COP

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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
(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, 239-0847,
Japan Voice81-468-47-5101, FAX
81-468-47-5431, E-Mailhonggang_at_crl.go.jp,
kohno_at_crl.go.jp Re IEEE P802.15 Alternative
PHY Call For Proposals, IEEE P802.15-02/327r7 Abs
tract 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.
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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
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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

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SSA-UWB for global harmonization and compliance

• Global harmonization and compliance is the
  everlasting aim and basic philosophy of CRL-UWB
  Consortium.
• CRLs 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.

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SSA-UWB philosophy

• Design a proper pulse wavelet with high frequency
  efficiency corresponding to any regulatory
  frequency mask.
• Adjust transmitted signals spectra adaptively,
  so as to minimize interference with co-existing
  systems.

Soft-Spectrum Adaptation (SSA)
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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).

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(No Transcript)
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Already-deployed radio systems in Japan
Fixed Microwave Communication System
Broadcasting System
DSRC (Dedicated Short Range Communication)
Radar System
Satellite Communication System
Amateur Radio
WLAN and FWA
Radio Astronomy
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Regulatory frequency assignment by MPHPT, in
Japan (almost no blank spectrum slot)
Victim services
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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
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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.
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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.
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Modified SSA-UWB pulse wavelet with adaptive
spectral notches achieving coexistence,
flexibility and efficient power transmission
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Modified SSA-UWB pulse wavelet with adaptive
spectral notches achieving coexistence,
flexibility and efficient power transmission
(Cont.)
Time (samples)
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Modified SSA-UWB pulse wavelet with adaptive
spectral notches achieving coexistence,
flexibility and efficient power transmission
(Cont.)
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SSA-UWB with more flexible pulse wavelet
combination and more dynamic band plan extension
More flexible SSA wavelet
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Global harmonization and compliance utilizing
modified SSA-UWB pulse wavelets
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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.

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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.

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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 ofUWB systems. Regulators in ITU Region 3
  (Korea, China,
• Singapore, etc in Asia) may be mostly same
  situation.

• Communications Research Laboratory (CRL), JAPAN

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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.

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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
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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.

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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.

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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.

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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.

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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.

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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
  TBSs.