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IEEE 802.15 <subject>

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Title: IEEE 802.15 <subject>


1
Project IEEE P802.15 Working Group for Wireless
Personal Area Networks (WPANs) Submission Title
TG3a Oki CFP Presentation Date Submitted 14
July, 2003 Source Reed Fisher Company
Oki Electric Industry Co., Ltd.
Address 2514 E.
Maddox Rd., Buford, GA 30519 USA.
Voice1-770-271-0529

E-Mailreedfisher_at_juno.com
Hiroyo Ogawa Company Communication Research
Laboratory Independent
Administrative Institution
Address 3-4 Hikarino-oka,
Yokosuka, Kanagawa, 239-09847 Japan.
Voice81-46-847-50
70, FAX81-46-847-5079
E-Mailhogawa_at_crl.go,jp Re
CFP presentation AbstractMillmeter-wave
ad-hoc wireless system for the alternate PHY to
IEEE802.15.3 MACPHY Standard
for Alt PHY PurposeProposal for an alternate
PHY to IEEE802.15.3 MACPHY Standard 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. ReleaseThe
contributor acknowledges and accepts that this
contribution becomes the property of IEEE
and may be made publicly available by
P802.15.
2
Millimeter-Wave Ad-hoc Wireless System
3
System Features
  • Utilization of unlicensed millimeter-wave band
  • - Restricted small and line of sight area but
    high speed data rate (622Mbps)
  • - High coexistence with the existing microwave
    band wireless system
  • Countermeasure in use of millimeter-wave band
  • Complete cancellation of phase noise and
    frequency-offset by
  • self-heterodyne transmission and detection
    technique

4
Application Images
  • Basic Ad-hoc system based on 802.15.3a
    applications
  • Ad-hoc information distribution system
  • ad-hoc coverage area extension
  • using P-P millimeter-wave link

5
Base Band (BB) IF processing
  • Basic transmission rate is 155.5Mbps using DQPSK.
  • Configuration Schemes
  • Multi-channel structure
  • Transmission rate per channel is 155.5Mbps.
  • -Frequency division multiplex using high
    speed modulators (155.5Mbps)
  • -Number of channels is 4.
  • (Total transmission rate is 622Mbps)
  • -Simultaneous transmission of divided
    frame

6
Base Band (BB) IF processing
  • Multi-channel structure

7
RF processing
  • Transmission
  • Single RF carrier is used.
  • Available Transmission method
  • -With Single Side band (SSB) Basic
    proposal
  • -With Double Side band (DSB)Optional
    proposal
  • -Without Side band
    Optional proposal
  • Reception for side band transmission
  • Complete cancellation of phase-noise and
    frequency -offset by the self -heterodyne
  • detection (square-law detection)

8
RF processing
9
RF Circuits (example)
receiver
transmitter
total size 89mm?83mm
up-converter
frequency doubler
internal structure
DC power supply control
medium power amplifier
low noise amplifier
self-heterodyne mixer
filter
appearance
wireless transceiver
chipset
10
Phase-noise performance Test
After Millimeter-wave transmission
Before Millimeter-wave transmission
Almost no phase-noise performance degradation
occurs by the millimeter-wave transmission
11
RF Transmitter Performance Test
Optimal condition (PLOPUSBPLSB) for DSB and
total transmission power of 10dBm can be
performed.
12
RF Receiver Performance Test
Good linearity can be achieved for wide power
range
13
Demonstration System
14
Coexistence
The interference impacted to microwave band
systems, from this proposed system, is
sufficiently smaller than the Rx sensitivity of
the microwave sys-tems. Therefore, coexistence
is assured. ltCalculation of interference
impacted to other standard system from this
proposal systemgt
15
Payload Bit Rate and Data Throughput
Throughput 1channelsThroughput per channel
NPayload_bits
Throughput per channel

NFrame LengthSIFS(N-1)MIFS
Where, Payload_bit1024byte, N 1(single),
5(multi),SIFS10µsec, MIFS2µsec Frame
Length 68.3µsec(DQPSK)
(1) Single Frame
(2) Multi frame
Payload
FCS
SIFS
68.3µsec
2µsec
10µsec
16
Payload Bit Rate and Data Throughput
17
Simultaneously Operating Piconets
- AWGN, 156 Mbps case - Co-channel separation
distance (dint) is about 44.6 m, from the
following calculation. - Each parameter is
referred to link budget. - Calculation is as
follows. - Tx antenna gain Rx antenna gain
20 dBi
18
Simultaneously Operating Piconets
- AWGN, 624 Mbps. - Co-channel separation
distance (dint) is about 11.2 m, from the
following calculation. - Each parameter is
referred to link budget. - Calculation is as
follows. - Tx antenna gain Rx antenna gain
20 dBi
19
Simultaneously Operating Piconets
- Channel model, 156 Mbps. - Co-channel
separation distance (dint) is about 44.6 m, from
the following calculation. - Each parameter is
referred to link budget. - Calculation is as
follows. - Tx antenna gain Rx antenna gain
20 dBi
20
Simultaneously Operating Piconets
- Channel model, 624 Mbps. - Co-channel
separation distance (dint) is about 11.2 m, from
the following calculation. - Each parameter is
referred to link budget. - Calculation is as
follows. - Tx antenna gain Rx antenna gain
20 dBi
21
System Performance
  • PER vs Distance characteristics of AWGN channel
  • - By using PER-Eb/N0 characteristics,
    PER-Distance characteristics are calculated.
  • - Parameters such as center frequency,
    propagation loss are referred to link budget.
  • - PER at d 10 m is less than 10-5

156 Mbps (ch1)
624 Mbps (ch 4)
22
Regulatory Compliance
Geographical Region
Transmission Power Limit
Frequency band
Regulatory
10dBm
59GHz-66GHz
Radio Regulatory Law Article 4.3 Enforcement
Regulatory Article 6.4
Japan
57GHz-64GHz
47 CFR 15.255
USA
10dBm
23
Backup Documents
YRP Yokosuka Research Perk
24
PHY Frame Format (Single channel Transmission)
25
PHY Frame Format (Multi-channel Transmission)
10 Bytes (80 bits)
102441028 Bytes (8224 bits)
FCS Frame Check Sequence HCS Header Check
Sequence Pad Padding
26
Interference and Susceptibility
Interference coming from the other
standard systems is negligibly small. The
interference attenuation by spurious strength and
filter is expected between Millimeter-wave
band (802.15.3a) and Micro-wave band (other
standard systems). ltCalculation for
interference from other standard systemgt
(Rx filter attenuation is calculated by using
N-degree Butterworth filter)
27
Signal Acquisition
  • Miss detect probability for Pmd 8
  • - Miss detect probability (Pmd) is probability
    which causes bit error more than 2 bits.
  • - 1 bit error is permitted to detect unique
    word.

Eb/N0 (dB) Condition
5.3 AWGN, 156 Mbps (1 ch)
6.5 AWGN, 624 Mbps (4 ch)
16.1 Channel model, 156 Mbps (1 ch)
19.4 Channel model, 624 Mbps (4 ch)
Use 1 ch (156Mbps)
Use 4 ch (624 Mbps)
28
Signal Acquisition
  • False alarm probability of AWGN channel
  • - False alarm probability (Pfa) is probability
    which detects unique word after PHY Header.
  • - Pfa 9.91 x 10-3 (at 156 Mbps), 3.91 x 10-2
    (at 624 Mbps)
  • - Calculation of Pfa is as follows
  • Pfa_1ch 0.520 x 10395 9.91 x 10-3
  • 20 unique word length
  • 10395 (length from PHY Header to FCS with
    including FEC per 1ch)
  • Pfa 1 - (1 - Pfa_1th ch) (1 - Pfa_2nd ch) (1 -
    Pfa_3rd ch) (1 - Pfa_4th ch)
  • It is assumed that Pfa_1th ch Pfa_2nd ch
    Pfa_3rd ch Pfa_4th ch
  • Pfa1 - (1 - Pfa_1ch)4 1 (1 9.91
    x 10-3)4 1.02 x 10-2
  • 4 Number of channel

29
System Performance
  • Required Eb/N0 for PER 8
  • - Error Correction BCH(63,51)
  • - The Narrow band channel model (Raleigh channel
    model )is used as the channel model
  • according to P802.15-02/490r1 which describes
    the channel model for the proposals using a
    narrow band
  • channel in the 2.4 GHz,5GHz, 60GHz, or other
    unlicensed spectrum.
  • - Required Eb/N0 for PER 8 as follows

Eb/N0 (dB) Condition
8.7 AWGN, 156 Mbps (1 ch)
9.1 AWGN, 624 Mbps (4 ch)
28.0 Channel model, 156 Mbps (1 ch)
30.0 Channel model, 624 Mbps (4 ch)
30
System Performance
  • PER vs Eb/N0 characteristics of AWGN channel and
    channel model

156 Mbps (ch 1)
624 Mbps (ch 4)
31
Link Budget
  • - Link budget is calculated for antenna gain 20
    dBi case.
  • - Proposed min. Rx sensitivity level is as
    follows.
  • Rx sensitivity level -60.3 dB (AWGN, 156
    Mbps), -53.9 dB (AWGN, 624 Mbps),
  • -41.0 dB
    (Channel model, 156 Mbps), -33.0 (Channel model,
    624 Mbps)
  • From link budget, directional antenna is
    necessary for millimeter-wave band system.

32
Sensitivity
Receiver Sensitivity Noise PowerRequired Eb/N0
Modulation Loss
Self-heterodyne LossChannel Multiplex Loss
33
Scalability
  • 156 Mbps data rate is supported by
    single-channel.
  • When the desired rate is greater than 156 Mbps,
    it could be provided by
  • changing number of channel.
  • When the desired rate is smaller than 156 Mbps,
    it could be provided by
  • symbol repetition.

34
Self-Evaluation -General Solution Criteria-
35
Self-Evaluation -PHY Protocol Criteria-
36
Self-Evaluation -MAC Protocol Enhancement
Criteria-
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