Title: IEEE 802.15 <subject>
1Project IEEE P802.15 Working Group for Wireless
Personal Area Networks (WPANs) Submission Title
TG3a Oki CFP Presentation Date Submitted 3
March, 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.
2Millimeter-Wave Ad-hoc Wireless System
3System Features
- Utilization of unlicensed millimeter-wave band
- - Restricted small area but high speed data
rate (125Mbps) - - 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
4Application 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
5Base Band (BB) IF processing
- Basic transmission rate is 125Mbps using DQPSK.
- Configuration Schemes
- 1) Single channel structure using one
modulator. - -Simple structure using a high speed
modulator (125Mbps) - 2) Multi-channel structure using 5
modulators. - -Frequency division multiplex using low
speed modulators (25Mbps) - -Number of channels is 5.
- -Transmission rate per channel is 25Mbps
- (Total transmission rate is 125Mbps)
- -Simultaneous transmission of divided
frame -
In the following parts of this document, the
system means the multi-channel structure type
unless there is particular explanation.
6Base Band (BB) IF processing
1) Single channel structure
Frequency allocation of IF band
2) Multi-channel structure
BB IF processing
BB
IF
Input data
Packet distribute
MAC control
Tx
C
Channel code/decode
Modulator /Demodulator
BPF
25Mbps
f1
Channel 1
C
Channel code/decode
Modulator /Demodulator
BPF
25Mbps
RF
f2
Channel 2
C
Channel code/decode
Modulator /Demodulator
BPF
Rx
25Mbps
f5
Channel 5
7RF processing
- Transmission
- Wireless transmission of both the signal and
the coherent local carrier - using DSB
- Reception
- Complete cancellation of phase-noise and
frequency -offset by - the self -heterodyne detection (square-law
detection)
Pt
Pr
Local leak DSB mixer
Receiver
Transmitter
2B
IF output
NFF
T
fi
fc
B
B
B
IM2
f
fc
fcfi
fc-fi
fi
B
8PHY Frame Format (Single channel structure)
9PHY Frame Format(Multi-channel structure)
10Interference 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)
11Coexistence
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
12Payload Bit Rate and Data Throughput
Data Throughput
Payload bit Rate
Modulation
Single Frame
Multi frame
77Mbps (61.6)
82Mbps (65.6)
125Mbps
DQPSK
13Simultaneously Operating Piconets
- Co-channel separation distance (dint) is about
7.94 m, from the following calculation. - Each
parameter is referred to link budget. -
Calculation is as follows. - Tx antenna gain
Rx antenna gain 8 dBi
Piconet1
Piconet2
MS
MS
MS
Interference signal I
Desired signal S
At Tx antenna gain Rx antenna gain 8 dBi
Reference Transmitter
Test Receiver
Interference Transmitters
Tx antenna gain 8 dBi
dint
Path loss at 1 meter 68 dB
Rx antenna gain 8 dBi
Tx power 10 dBm
-42 dBm
System loss 13 dB
-50 dBm
-55 dBm
-60.3 dBm
SNR 12.7 dB
Proposal Min. Rx level-66.3 dBm
Path loss at dint meter 18 dB
-73 dBm
-73 dBm
( dint meter 7.94 m)
14Signal Acquisition
- Miss detect probability of AWGN channel
- - 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 6.7 dB at Pmd8 x 10-2
- - Calculation of Pmd is as follows
- BER (Bit Error Rate) 1/2 erfc 2(Eb/N0)1/2
sin(p/8) - Pmd_1ch 1 - (1 - BER)x (1 - BER)(x-1) BER
x - x unique word length (20) for 1 channel
- Pmd 1 - (1 - Pmd_1th ch) (1 - Pmd_2nd ch) (1 -
Pmd_3rd ch) (1 - Pmd_4th ch) (1 - Pmd_5th ch) - It is assumed that Pmd_1th ch Pmd_2nd ch
Pmd_3rd ch Pmd_4th ch Pmd_5th ch - Pmd 1 - (1 - Pmd_1 ch)5
-
15Signal Acquisition
- False alarm probability of AWGN channel
- - False alarm probability (Pfa) is probability
which detects unique word after PHY Header. - - Pfa 1.02 x 10-2
- - Calculation of Pfa is as follows
- Pfa_1ch 0.520 x 2139 2.04 x 10-3
- 20 unique word length
- 2139 (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) (1 - Pfa_5th ch) - It is assumed that Pfa_1th ch Pfa_2nd ch
Pfa_3rd ch Pfa_4th ch Pfa_5th ch - Pfa1 - (1 - Pfa_1ch)5 1 (1 2.04
x 10-3)5 1.02 x 10-2 - 5 Number of channel
-
16System Performance
- Required Eb/N0 for PER 8 in AWGN channel
- - Required Eb/N0
- 9.7dB (125Mbps, DQPSK)
- - Calculation of Psys is as follows
- BER1 1/2 erfc 2(Eb/N0)1/2 sin(p/8) for
DQPSK - BER 2 45BER12 (BER2 is Bit Error Rate after
BCH(31,26)) - P1 miss detection error (Pmd 1ch)
- P2 probability which causes error from PHY
Header to HCS (Length m bit) 1 (1 BER2)m - P3 probability which causes error from Payload
to FCS (Length n bit) 1 (1 BER2)n - PER (Psys1ch) for 1 channel is as follows
- Psys1ch P1 P2 P3 P1 (1 P1)P2 1
P1 (1 P1)P2P3 - Psys 1 - (1 - Psys_1th ch) (1 - Psys_2nd ch)
(1 - Psys_3rd ch) (1 - Psys_4th ch) (1 - Psys_5th
ch) - It is assumed that Psys_1th ch Psys_2nd ch
Psys_3rd ch Psys_4th ch Psys_5th ch - Psys 1 - (1 - Psys_1 ch)5
17System Performance
- PER vs Eb/N0 characteristics of AWGN channel
At 125 Mbps (DQPSK)
18System 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
At 125 Mbps (DQPSK)
19Sensitivity
Receiver Sensitivity Noise PowerRequired Eb/N0
Modulation Loss
Self-heterodyne LossChannel Multiplex Loss
Bit Rate
Term
Note
125Mbps(DQPSK)
-92dBm
Noise Power
-174dBm/Hz10log10(25MHz)8dB(NF)
Required Eb/No
PER lt8
9.7dB
Modulation Loss
3dB
6dB
Self- heterodyne Loss
10log10 (4)
7dB
10log10(5)
Channel Multiplex Loss
Receiver Sensitivity
-66.3dBm
20Link Budget
- - Link budget is calculated for antenna gain 0
dBi - case and 8 dBi case.
- - Link margin is as follows.
- Link margin -12 dB (antenna gain 0 dBi)
- Link margin 4 dB (antenna gain 8 dBi)
- From link budget, directional antenna is
necessary - for millimeter-wave band system.
-
21Regulatory Compliance
22Scalability
- 125 Mbps data rate is supported by multi-channel
(25 Mbps5 channel). -
- At 125 Mbps, DQPSK modulation/demodulation is
used. - When the desired rate is less than 125 Mbps, it
is provided by decreasing - the number of active RF channels.
- When the desired rate is greater than 125 Mbps,
it could be provided by - changing modulation method(see appendix).
-
23Self-Evaluation -General Solution Criteria-
24Self-Evaluation -PHY Protocol Criteria-
25Self-Evaluation -MAC Protocol Enhancement
Criteria-
26Appendix Optional proposal for 250 Mbps
27PHY Frame Format(Single channel structure)
28PHY Frame Format(Multi-channel structure)
29Payload Bit Rate and Data Throughput
30Simultaneously Operating Piconets
- Co-channel separation distance (dint) is about
7.94 m, from the following calculation. - Each
parameter is referred to link budget. -
Calculation is as follows. - Tx antenna gain
Rx antenna gain 8 dBi
Piconet1
Piconet2
MS
MS
MS
Interference signal I
Desired signal S
At Tx antenna gain Rx antenna gain 8 dBi
Reference Transmitter
Test Receiver
Interference Transmitters
Tx antenna gain 8 dBi
dint
Path loss at 1 meter 68 dB
Rx antenna gain 8 dBi
Tx power 10 dBm
-42 dBm
System loss 13 dB
-50 dBm
-55.8 dBm
-55 dBm
Proposal Min. Rx level-61.8 dBm
SNR 17.2 dB
Path loss at dint meter 18 dB
-73 dBm
-73 dBm
( dint meter 7.94 m)
31System Performance
- Required Eb/N0 for PER 8 in AWGN channel
- - Required Eb/N0
- 11.2dB (250Mbps/16QAM)
- - Calculation of Psys is as follows
- BER1 1/2 erfc 2(Eb/N0)1/2 sin(p/8) for
DQPSK from (Preamble to HCS) - BER 1 (3/8) erfc((CNR/10)1/2) for
16QAM for (PayloadFCS) - BER 2 45BER12 (BER2 is Bit Error Rate after
BCH(31,26)) - P1 miss detection error (Pmd 1ch)
- P2 probability which causes error from PHY
Header to HCS (Length m bit) 1 (1 BER2)m - P3 probability which causes error from Payload
to FCS (Length n bit) 1 (1 BER2)n - PER (Psys1ch) for 1 channel is as follows
- Psys1ch P1 P2 P3 P1 (1 P1)P2 1
P1 (1 P1)P2P3 - Psys 1 - (1 - Psys_1th ch) (1 - Psys_2nd ch)
(1 - Psys_3rd ch) (1 - Psys_4th ch) (1 - Psys_5th
ch) - It is assumed that Psys_1th ch Psys_2nd ch
Psys_3rd ch Psys_4th ch Psys_5th ch - Psys 1 - (1 - Psys_1 ch)5
32System Performance
- PER vs Eb/N0 characteristics of AWGN channel
At 250 Mbps (16QAM)
33System 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 4 m is less than 10-4.
At 250 Mbps (16QAM)
34Sensitivity
Receiver Sensitivity Noise PowerRequired Eb/No
Modulation Loss
Self-heterodyne LossChannel Multiplex Loss
Bit Rate
Term
Note
250Mbps(16QAM)
-92dBm
Noise Power
-174dBHz10log10(25MHz)8dB(NF)
11.2dB
Required Eb/No
PER lt8
Modulation Loss
6dB
6dB
Self- heterodyne Loss
10log10 (4)
7dB
10log10(5)
Channel Multiplex Loss
Receiver Sensitivity
-61.8dBm
35Link Budget for 250 Mbps