doc.: ieee 802.15-03/097r0 submission march, 2003 r. kohno, h. zhang, h. nagasaka, crlslide 1...
TRANSCRIPT
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 1
doc.: IEEE 802.15-03/097r0
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: [Ultra Wideband impulse radio using free-verse pulse waveform shaping , Soft-Spectrum adaptation, and local sine template receiving]Date Submitted: [3 March, 2003]Source: [Ryuji Kohno, Honggang Zhang, Hiroyuki Nagasaka] Company [(1) Communications Research Laboratory, (2) Yokohama National University, (3) Samsung Yokohama Research Institute]Connector’s 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], [email protected]]Re: [IEEE P802.15 Alternative PHY Call For Proposals, IEEE P802.15-02/327r7]Abstract: [Soft-Spectrum UWB transferring schemes with free-verse and geometric pulse waveform adaptation and shaping are proposed, which are suitable for co-existence, interference avoidance, matching with regulatory spectral mask, and high data rate. Local sine template receiving scheme is also investigated for Soft-Spectrum UWB impulse radio.]
Purpose: [For investigating the characteristics of High Rate Alternative PHY standard in 802.15TG3a, based on Soft-Spectrum adaptation, pulse waveform shaping and local sine template receiving]
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.
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 2
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Submission
Ultra Wideband Impulse Radio Using Free-Verse Pulse Waveform Shaping, Soft-
Spectrum Adaptation and Local Sine Template Receiving
Ryuji Kohno* §, Honggang Zhang *, Hiroyuki Nagasaka ‡
* UWB Technology InstituteCommunications Research Laboratory (CRL)
§ Yokohama National University‡ Samsung Yokohama Research Institute
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 3
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Submission
Outline
Philosophy of Soft-Spectrum adaptation with flexible pulse waveform design Soft-Spectrum adaptation based on free-verse pulse waveform shaping Soft-Spectrum adaptation based on geometric pulse waveform shaping Interference avoidance and co-existence Scalable, adaptive performance improvement Local sine template receiving Summary
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 4
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Submission
What’s the solution?(I) Pulse domain (II) Spectrum domain
Considering the whole frequency bands from DC to 15 GHz, in regard of the FCC Spectrum Mask
The maximum emission power is limited to –80dBm/MHz (whole bands) Frequency efficiency is extremely worse
What we want to do ? Giving spectrum freedom flexible pulse design Maintaining exchangeability with existing UWB systems Still keeping the pulse width in the order of ns for high data rate
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 5
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Submission
Basic philosophy
EX(1): some bands are restrained
EX(2): free-verse spectrum design
Pulse design corresponding to the required bandwidths Flexible and adaptive spectrum (Soft-Spectrum), even if
the Spectrum Mask were changed
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 6
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Submission
Section (I)
Soft-Spectrum (Soft-Bands) Adaptation with Free-Verse Pulse Waveform
Shaping
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 7
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Submission
N
kk tftf
1
)()(
tN
tB
N
Bkftf Lk
)sin()]
2
)21((2cos[)(
Basic Formulation Pulse Generator
Divide the whole bandwidth into several sub-bands Soft Spectrum (spectrum matching) Pulse synthesis M-ary signaling
B:bandwidth [f H ~ f L]
N division
Feasible Solution: Pulse design satisfying Spectrum Mask
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 8
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Submission
Robustness to MAI
Frequency characteristics
Pulse width
Tread-
off
Pulse width of 10 ns
Pulse width of 3 ns
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 9
doc.: IEEE 802.15-03/097r0
Submission
A: Conventional pulse B: Proposed pulse (K-1)
AWGNChannel
6.75GHz99% Bandwidth
Gold SequenceTH Sequence
10ns/8Frame/Slot
3ns (A)/0.39ns(B)Pulse width
PPM (Asyn.)Modulation
5, 10Users
10000bitsTransmitted data
Performance comparisons of Multiple Access Interference(MAI)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 10
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Submission
BER performance comparisons of pulse (A) and (K-1)
AWGNChannel
Gold SequenceTH Sequence
100MbpsData rate
(A) 1.0/3ns
(B) 2.84*10 /0.7ns
(A) 4.89*10 /0.39ns
(A) 0.76 /30ns (BPF)
SNR/Pulse width
PPM (Asyn.)Modulation
1Users
10000bitsTransmitted data
-5
-5
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 11
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Feasible Solution: Pulse design satisfying coexistence and interference avoidance with existing narrowband systems
[GHz]
Time and frequency domain characteristics of the conventional Gaussian-type pulse
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 12
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Submission
Data rate UWB : 3.2Mbps
SS : 384kbps
Bandwidth UWB : 3.2GHz
SS : 3.4MHz
DS-SS chip rate : 3.84Mcps
DS-SS carrier frequency ωc:2GHz
UWB pulse time duration : 0.7ns
Number of pulses per symbol Ns :31
Pulse repetition time Tf : 10ns
DIR:-16.66dB
Performance comparisons of the
coexistence of the DS-SS and UWB systems
(2) BER of UWB system while receiving interference from other co-existing DS-SS
system
(1) BER of UWB system while causing interference to other co-existing DS-SS system
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 13
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Submission
Time and frequency domain characteristics of the proposed Dual-cycle pulse (K-2)
(Note: several band notches happen)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 14
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Submission
Performance comparisons of the coexistence of the DS-SS and UWB systems (K-2)
(1) BER of DS-SS system while Dual-cycle UWB system co-exists
(2) BER of Dual-cycle UWB system while DS-SS system co-exists
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 15
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Submission
Time and frequency domain characteristics of the proposed specific pulse waveform (K-3) generated
by different Gaussain pulses overlapping (Note: band notches happen at 2.4 and 5 GHz)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 16
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Submission
(1) BER of DS-SS system while K-3 UWB system causing interference
(2) BER of K-3 UWB system while DS-SS system causing interference
Performance comparisons of the coexistence of DS-SS and UWB systems (K-3)
(Note: DS-SS system uses carrier frequency of 2.4 GHz, i.e. notch band for the proposed UWB system )
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 17
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Time and frequency domain characteristics of another proposed pulse waveform (K-4) generated by different
Gaussain pulses overlapping (Note: band notches clearly happen at 2.4 and 5 GHz
as well)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 18
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Submission
(1) BER of DS-SS system while K-4 UWB system causing interference
(2) BER of K-4 UWB system while DS-SS system causing interference
Performance comparisons of the coexistence of the DS-SS and UWB systems (K-4)
(Note: DS-SS system uses carrier frequency of 2.5 GHz, i.e. notch band for the proposed UWB system )
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 19
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Submission
Giving Spectrum Freedom Flexible pulse waveform and spectrum design
m1
0
t
t
m
02
2
cos2exp
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 20
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Submission
Section (II)
Soft-Spectrum (Soft-Bands) Adaptation with Geometric Pulse Waveform
Shaping
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 21
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Submission
Geometric (regular) Soft-Spectrum pulse waveform with Bi-phase/Bi-polar modulation
(Several bits per geometric Soft-Spectrum pulse is available, seeing the following Slides)
Data 1:
Data 0:
t
t
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 22
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0
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1
Soft-Spectrum waveform based on Gaussian pulse
Time (ns)
Waveform Amplitude [V]
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0
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0.08
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Soft-Spectrum waveform based on Gaussin Monocycle
Time (ns)
Waveform Amplitude [V]
Geometric Soft-Spectrum (SS) pulse waveform generated by a series of Gaussian pulses (the left) Geometric Soft-Spectrum (SS) pulse waveform generated by a series of Gaussian Monocycles (the right) First derivative of Gaussian pulses
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 23
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Submission
0 5 10 15 20 25 30 35 40 45 50-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Power Spectral Density of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
0 10 20 30 40 50 60-400
-350
-300
-250
-200
-150
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-50
0
Power Spectral Density of 1th Derivative of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
Spectral characteristics of the geometric Soft-Spectrum Gaussian pulses (the left) Spectral characteristics of first derivative of the geometric Soft-Spectrum Gaussian pulses (the right) – Gaussian Monocycle type
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 24
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Submission
0 5 10 15 20 25 30 35 40 45 50-140
-120
-100
-80
-60
-40
-20
0
Power Spectral Density of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
0 5 10 15 20 25 30 35 40 45 50-400
-350
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-50
0
Power Spectral Density of 1th Derivative of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
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-0.5
0
0.5
1
1.5
Soft-Spectrum waveform based on Gaussian pulse
Time (ns)
Waveform Amplitude [V]
-2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5-0.05
-0.04
-0.03
-0.02
-0.01
0
0.01
0.02
0.03
0.04
0.05
Soft-Spectrum waveform based on Gaussin Monocycle
Time (ns)
Waveform Amplitude [V]
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 25
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Submission
0 5 10 15 20 25 30 35 40 45 50-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
Power Spectral Density of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
0 5 10 15 20 25 30 35 40 45 50-450
-400
-350
-300
-250
-200
-150
-100
-50
Power Spectral Density of 1th Derivative of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
-2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5-0.4
-0.3
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-0.1
0
0.1
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Soft-Spectrum waveform based on Gaussian pulse
Time (ns)
Waveform Amplitude [V]
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-6
-4
-2
0
2
4
6
8x 10
-3Soft-Spectrum waveform based on Gaussin Monocycle
Time (ns)
Waveform Amplitude [V]
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 26
doc.: IEEE 802.15-03/097r0
Submission
Adaptive, controllable Spread-and-Shrink (SS) of frequency bandwidths (i.e. Soft-Spectrum) is feasible,
according to the actual interference environment and the spectrum requirements
“Soft-Bands” philosophy as mentioned before
0 5 10 15 20 25 30 35 40 45 50-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Power Spectral Density of Soft-Spectrum Gaussian pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 27
doc.: IEEE 802.15-03/097r0
Submission
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0
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1
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Geometric Soft-Spectrum pulse waveforms with various envelopes
Triangular-type envelope Exponential-type envelope
Rugby-football-type envelope Gaussian-type envelope
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March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 28
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Submission
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0
0.02
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Soft-Spectrum waveform based on Gaussin Monocycle
Time (ns)
Waveform Amplitude [V]
0 5 10 15 20 25 30 35 40 45 50-400
-350
-300
-250
-200
-150
-100
-50
0
Power Spectral Density of 1th Derivative of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
0 5 10 15 20 25 30 35 40 45 50-200
-180
-160
-140
-120
-100
-80
-60
-40
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
-20
0
Power Spectral Density of Soft-Spectrum Gaussian Pulses
-2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5-0.8
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0
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1
1.2
Soft-Spectrum waveform based on Gaussian pulse
Time (ns)
Waveform Amplitude [V]
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 29
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Submission
-2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5-1
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0
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Soft-Spectrum waveform based on Gaussian pulse
Time (ns)
Waveform Amplitude [V]
0 5 10 15 20 25 30 35 40 45 50-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Power Spectral Density of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
0 5 10 15 20 25 30 35 40 45 50-400
-350
-300
-250
-200
-150
-100
-50
0
Power Spectral Density of 1th Derivative of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
-2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5-0.1
-0.08
-0.06
-0.04
-0.02
0
0.02
0.04
0.06
0.08
0.1
Time (ns)
Waveform Amplitude [V]
Soft-Spectrum waveform based on Gaussin Monocycle
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 30
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Submission
0 5 10 15 20 25 30 35 40 45 50-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Power Spectral Density of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
0 5 10 15 20 25 30 35 40 45 50-400
-350
-300
-250
-200
-150
-100
-50
0
Power Spectral Density of 1th Derivative of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
-2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5-0.1
-0.08
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0
0.02
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Soft-Spectrum waveform based on Gaussin Monocycle
Time (ns)
Waveform Amplitude [V]
-2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5-1
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0
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Soft-Spectrum waveform based on Gaussian pulse
Time (ns)
Waveform Amplitude [V]
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 31
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Submission
0 5 10 15 20 25 30 35 40 45 50-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Power Spectral Density of Soft-Spectrum Gaussian Pulses
Frequency (Sample: 1Sample=200MHz)
Power Spectral Density (PSD) [dB]
Spectral characteristics with respect to various geometric Soft-Spectrum pulse waveforms ( i.e., Exponential-,
Rugby-Football-, and Gaussian-type envelops)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 32
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Interference avoidance and co-existence using flexible geometric Soft-Spectrum pulse transmission
Spectrum overlapping and possible
interference with WLAN (802.11a)
Do not use overlapping frequency
bandwidth causing possible interference
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 33
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Submission
Geometric Soft-Spectrum adaptation (Spread-and-Shrink) and pulse waveform shaping provide new
dimension, frontier, and challenge ( seeing FCC UWB Emission Limit: FCC 02-48, UWB Report & Order)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 34
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Submission
3.1 10.6
Just a dream-world?
“The New Continent” ?
GPS Band
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 35
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Submission
Successful precedent : Adaptive Frequency-Hopping
(Co-existence of Bluetooth and IEEE 802.11b)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 36
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Submission
M-ary Pulse Shape Modulation (PSM) or Pulse Shape Multiple Access (PSMA) based on geometric Soft-Spectrum waveforms
ort
I 100 110101 •••
t
000 010001 •••
t
t
II
III
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 37
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Submission
Comparisons of Hard-Spectrum (single-band) and geometric Soft-Spectrum (Soft-Bands)
impulse radio transmissions
Raw bit rate/bits per pulse / No. of sub-
bands
Raw bit rate*pulses per bit
PRF (per sub-band)
One or more bits per pulse
Multiple pulses per bitProcessing Gain
(per sub-band)
Multiple sub-bandsOneFrequency Bands
LowHigh Duty Cycle (PRF)
Soft-SpectrumHard-Spectrum
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 38
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Submission
Indoor multipath fading: Example of indoor UWB impulse radio signal propagation (IEEE 802.15SG3a S-V model)
0 50 100 150 200 250-0.8
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0
0.2
0.4
0.6Impulse response realizations
Time (ns)
From transmitter
TX RX
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 39
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Submission
Another example of indoor UWB impulse radio signal propagation
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 40
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Submission
Geometric Soft-Spectrum pulses Group Delay
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1
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0
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1
Geometric Soft-Spectrum inter-pulse interference caused by multipath fading
Group Delay
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0
0.5
1
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 41
doc.: IEEE 802.15-03/097r0
Submission
Inter-pulse interference effects of multipath fading on various geometric Soft-Spectrum pulse waveforms
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March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 42
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Submission
Multipath diversity for geometric Soft-Spectrum intra/inter pulse combining
Tc
C 1
(t)C 2
(t)C 3
(t)CN(t)
Tc Tc
Soft-Spectrum Rake Receiver
BPF
-0.5
0
0.5
1
Geometric Soft-Spectrum
pulses
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 43
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Submission
Improved intra-pulse multipath combining performance, but deteriorated inter-pulse
multipath combining performance if geometric Soft-Spectrum waveform Group
Delay were not resolved
Deteriorated intra-pulse multipath combining performance, but improved inter-pulse
multipath combining performance if geometric Soft-Spectrum waveform Group
Delay were not resolved
Intermediated multipath combining performance achievement
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Multipath diversity for various geometric Soft-Spectrum pulse waveforms
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 44
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Submission
Master or Hub
Slave or Leaf node Proxy node or
wireless Bridge
A
B
C
Several neighbor piconets in UWB multiuser environment
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 45
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Submission
Source node
Data link layer control: identification and management of usable resource
multi-hop link
one-hop direct link Destination node
Multi-hop UWB WPAN with resource management, relaying and route discovering
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 46
doc.: IEEE 802.15-03/097r0
Submission
UWB multi-hop communications with Ad-hoc real-time relaying for multimedia data transfer
(Multipath combining scheme is used by the real-time UWB Repeater)
RXTX UWB RP
Pre-RakePost-Rake
TX RX RP
10 m 10 m
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 47
doc.: IEEE 802.15-03/097r0
Submission
-20 -15 -10 -5 0 5 10 1510
-6
10-5
10-4
10-3
10-2
10-1
100BER in free space loss and AL (assumed loss: -10dB more power attenuation than free space loss)
SNR[dB]
BER
direct path onlymultipath channel
multipath channel without direct path between TX and RXusing Rake on the RP
using Rake on the RP but RP receives no direct pathmultipath channel in AL
multipath channel without direct path between TX and RP in ALusing Rake on the RP in AL
using Rake on the RP in AL but RP receives no direct path
Performance improvement by usingMultipath combining scheme at the real-time UWB
Repeater
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 48
doc.: IEEE 802.15-03/097r0
Submission
Section (III)
Local Sine Template Receiving fro UWB Impulse Radio
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 49
doc.: IEEE 802.15-03/097r0
Submission
Utilizing local-generated sine template instead of conventional TH-PPM template-pulse Simplified correlator circuits Low cost, low power consumption Robustness to impulse radio multipath fading Necessary to estimate and control local Initial-phase
Characteristics of proposed Local Sine Template receiving
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 50
doc.: IEEE 802.15-03/097r0
Submission
Pulse sequences generation and modulation on transmitting side
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 51
doc.: IEEE 802.15-03/097r0
Submission
Pulse sequences after Band Pass Filtering (BPF) on transmitting side
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 52
doc.: IEEE 802.15-03/097r0
Submission
Received pulse sequences before adding AWGN on receiving side
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 53
doc.: IEEE 802.15-03/097r0
Submission
Received pulse sequences after adding AWGN on receiving side
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 54
doc.: IEEE 802.15-03/097r0
Submission
Received pulse sequences after BPF and Mixer on receiving side (Correlation with local sine template)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 55
doc.: IEEE 802.15-03/097r0
Submission
Received pulse sequences after Low Pass Filtering (LPF) on receiving side (demodulation and data out)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 56
doc.: IEEE 802.15-03/097r0
Submission
Effects of Initial-phase estimation scheme (i.e. Initial-phase=180deg)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 57
doc.: IEEE 802.15-03/097r0
Submission
Effects of Initial-phase estimation scheme (i.e. Initial-phase=150deg)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 58
doc.: IEEE 802.15-03/097r0
Submission
Effects of Initial-phase estimation scheme (i.e. Initial-phase=120deg)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 59
doc.: IEEE 802.15-03/097r0
Submission
Effects of Initial-phase estimation scheme (i.e. Initial-phase=90deg)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 60
doc.: IEEE 802.15-03/097r0
Submission
Effects of Initial-phase estimation scheme (i.e. Initial-phase=45deg)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 61
doc.: IEEE 802.15-03/097r0
Submission
Effects of Initial-phase estimation scheme (i.e. Initial-phase=0deg)
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 62
doc.: IEEE 802.15-03/097r0
Submission
Summary (I) We propose a Ultra Wideband impulse radio
transferring scheme utilizing Soft-Spectrum adaptation and free-verse pulse waveform shaping.
Soft-Spectrum adaptation and free-verse pulse waveform shaping can satisfy the FCC Spectrum Mask freely and be applied to avoid possible interferences with other existing narrowband wireless systems.
Scalable and adaptive performance improvement can be achieved by utilizing pulse waveform shaping even in multi-user and multipath fading environment.
March, 2003
R. Kohno, H. Zhang, H. Nagasaka, CRLSlide 63
doc.: IEEE 802.15-03/097r0
Submission
We also propose a local sine template receiving scheme.
Simplified correlation scheme and immunity to multipath fading can be achieved.
Initial-phase control is needed.
Summary (II)
Reference
Patent Pending: JPA2003-47990