May 2003
doc.: IEEE 802.15-03/107r4
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [I2R CFP Presentation for 802.15.3a UWB Alt-PHY]
Date Submitted: [5 May, 2003]
Source: [Francois Chin, Madhukumar, Xiaoming Peng, Sivanand] Company [Institiute for Infocomm Research
(Singapore)]
Address [20 Science Park Road, #02-34/37 Teletech Park, Singapore 117674]
Voice:[(65)6870-9309], FAX: [(65)6779-5441], E-Mail:[chinfrancois@i2r.a-star.edu.sg]
Abstract: [This contribution describes a proposal for high-rate wireless personal area network PHY layer
approach based on sub-band hopping system architecture. The system has variable data / sampling rates to
address numerous application / power / complexity requirements; flexible spectrum management
techniques to adapt, to different regulatory environments; good performance in the presence of multipath
and multiple access interference especially with channel equalisation.]
Purpose: [This contribution is submitted to the IEEE 802.15.3a task group for consideration as a possible
solution for high-rate, short-range WPAN applications.]
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.
Submission
Slide 1
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Outline
•
•
•
•
•
•
•
•
•
Key features
Multi-band plan
Variable pulse rate Multi-band PHY
Frame structure & Preamble
RF & Baseband Architecture
Performance Analysis
Implementation feasibility
Coexistence & Interference Plans
Self evaluation
Submission
Slide 2
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Key Features
• Uses multiband approach
– Available spectrum is divided into multiple bands
– PNC ID based Time-frequency sub-band hopping sequence for
uncoordinated piconets
– Frequency agility for interference mitigation
– Flexible spectrum usage
– Compatible with existing wireless PAN/LAN standards
• High spectral efficiency
– QPSK modulation for data within each band
– Reed-Solomon outer code + Quadrature M-ary Orthogonal Keying
(QMOK) inner code
– Multi-channel equaliser per subband to suppress ISI and interference
from simultaneously operating piconets (SOP)
• Variable pulse rate transmission
– Variable data / sampling rates to cater to different power / complexity
requirements
Submission
Slide 3
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Multiband Approach
• Divide spectrum into multiple bands
0
– 13 subbands
-1
-2
Pulse Freq Response (dB)
• Lower frequency group has 7
subbands
• Higher frequency group has 6
subbands
– Reference clock as 11 MHz
– Chip rate per subband is 308 MHz
(= 28*11)
-3
-4
-5
-6
-7
-8
• Chip duration ~3.25 ns
– Rectified cosine pulse shaping filter
• ~ 622 MHz wide bands to best utilize
the spectrum
-9
-10
3000
4000
5000
6000
7000
MHz
8000
9000
10000
11000
– Inter-band spacing is 539 MHz (=
1.75*308)
Submission
Slide 4
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Band Allocation Plan
High Frequency Group
Low frequency group
1
2
3
4
5
6
~
~
0
7
8
9
10
11 12
Sacrifice one band for WLAN coexistence (depending on geographical location)
Possible interferences: 802.11 interference in Japan (4.9-5.25 GHz) (Band 2)
and in Europe/US (5.15-5.825 GHz) (Band 3 & 4)
Band No
Lower (Centre) Upper Fr.
Band No
Lower (Centre) Upper Fr.
0
3308 (3619) 3930
7
7081 (7392) 7703
1
3847 (4158) 4469
8
7620 (7931) 8242
2
4386 (4697) 5008
9
8159 (8470) 8781
3
4925 (5236) 5547
10
8698 (9009) 9320
4
5464 (5775) 6086
11
9237 (9548) 9860
5
6003 (6314) 6625
12
9776 (10087) 10398
6
6542 (6853) 7164
Submission
Frequency in MHz
Slide 5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Band Allocation Plan
• 13 active frequency bands for transmission
• Divided into lower (band 0-6) and upper (band 7-12)
frequency groups
– One band in the lower group is avoided for co-existence with
802.11a WLAN
• Centre frequencies selected for ease of implementation
• Both groups can be used in parallel to increase the bit
rate
Submission
Slide 6
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Transmit Pulse Shape
• Rectified cosine pulse as pulse shape filter
– Pulse width ~ 3.25 ns (=1/ 308 MHz = 1/(28*11MHz))
– ~ 622 MHz wide bands to best utilize the spectrum
First Subband (Low Frequency Group)
rectified cosine pulse shape
0.1
0
0.08
-10
Pulse Freq Response (dB)
0.06
-20
0.04
0.02
-30
0
-40
-0.02
-0.04
-50
-0.06
-60
-70
2000
-0.08
2500
Submission
3000
3500
MHz
4000
4500
5000
Slide 7
-0.1
0
0.5
1
1.5
2
2.5
3
3.5
nsec
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Time-Frequency Hopping Sequence
for Multiple Access
• Length 6 time-frequency sequence
• Random sequences can be used
– Possible number of hopping sequence is 720 (= 6!)
– Various degree of collision from multiple devices will be resolved using
oversampling multi-channel equalizer
• Sequence can be determined by piconet coordinator’s (PNC) ID
– Faster piconet establishment
• Linear congruency design is an good method to design sequences
that will minimise impact of multiple access interference
• All Beacons will have a fixed TF Hopping Sequence for easy
detection
Submission
Slide 8
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Variable pulse rate Multi-band PHY
• Supports 3 pulse rates
– 77/154/308 MHz
– Sampling frequency is 4*PRF (Pulse Repetition Frequency)
– Independent of total number of subband available, few subbands
means shorter PRI
– Adaptive sampling rates for better power utilization
– Oversampling for multi-channel equalisation to provide effective
ISI suppression when operating in channels with large delay
spread and interference suppression when operating under
simultaneous operating piconets
Submission
Slide 9
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Variable pulse rate (for 6-band)
Sampling instance
• PRl/subband is inversely proportional to chip rates
– 19.5 ns:
– 39 ns:
– 78 ns:
6 pulses, each with pulse width ~3.25 ns for 308 Mcps
6 pulses, each with pulse width ~3.25 ns for 154 Mcps
6 pulses, each with pulse width ~3.25 ns for 77 Mcps
• Sampling frequency changes with chip rate (= 4*chip rate) so as to
reduce ADC power consumption at lower data rate
Submission
Slide 10
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Operation Modes and Payload Bit Rates
Mode
Index
Modulation
Reed-S
Coding
Rate
QMOK
Coding
Rate
Pulse Rate
[Mpps]
Sub-Band
PRI [ns]
Payload Bit Rate
[Mbps]
(6-band example)
0
QPSK
1 (Nil)
Repetition
code x #bands
154
39
25.67
1
QPSK
221/255
4/8
77
78
67
2
QPSK
221/255
¾
77
78
100
3
QPSK
221/255
4/8
154
39
133
4
QPSK
221/255
¾
154
39
200
5
QPSK
221/255
4/8
308
19.5
267
6
QPSK
221/255
¾
308
19.5
400
7
QPSK
221/255
1
308
19.5
533
• Mode 0 for beacons & headers, with same information in all subbands
• PHY header data rate field mapped to Operation mode index
• In each operation mode, different number of sub-bands can be used, and
the payload bit rate will be proportional to #subbands used
Submission
Slide 11
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Preamble Modulation & Symbol Rate
Op.
Mode
Index
Modulation
Reed-S
Coding
Rate
QMOK
Coding
Rate
Pulse Rate
[Mpps]
Sub-Band
PRI [ns]
Preamble Symbol
Rate [Mbps]
(6 bands example)
1&2
QPSK
1 (Nil)
Repetition
code x #bands
77
78
12.83
3&4
QPSK
1 (Nil)
Repetition
code x #bands
154
39
25.67
5,6&7
QPSK
1 (Nil)
Repetition
code x #bands
308
19.5
51.33
• Preamble has same pulse rate as payload information
Submission
Slide 12
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Frame structure
Frame n-1 Transmision
Frame n Transmission
MPDU_bits
(variable)
Preamble
PHY Header
T_PA_INIT
T_PHYHDR
MAC
Header
HCS
T_MACHDR T_HCS
MPDU
T_MPDU
FCS
MIFS
T_FCS T_MIFS
Preamble
PHY Header
T_PA_CONT
T_PHYHDR
MAC
Header
HCS
T_MACHDR T_HCS
MPDU
T_MPDU
FCS
SIFS
T_FCS T_SIFS
Packet overhead parameters for data throughput comparison
• Features
– Preamble: CAZAC symbols repeated on all subbands
– Headers: Fixed pulse rate at 154 Mpps
– Payload bits: RS outer coded + QMOK inner coded
• No structural change for existing 15.3 frame definition
– Same MAC header and HCS definition
– PHY header data rate field mapped to Operation mode index
Submission
Slide 13
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Preamble Definition
• 16 CAZAC sequences
• CCA/packet detection
• Timing acquisition
10 CAZAC Sequences
• Channel estimation
• Channel equalisation
• SIR estimation / Link
quality assessment
5 CAZAC Sequences
• End of preamble
delimiter
1 inverted CAZAC
Sequence
Submission
Slide 14
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Preamble Sequence
• Use cyclic shifted CAZAC sequence for preamble on different
subbands for rapid acquisition
Subband #
1
C0
C1
2
3
C2
C1
C1
C1
2
3
4
C6
C11
C1
C9
4
C8
C7
0
C1
5
4
6
C0
C1
5
C3
C5
C4
3.25ns
CAZAC Sequence:
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
1+j
1+j
1+j
1+j
-1+j
-1-j
1-j
1+j
-1-j
1+j
-1-j
1+j
1-j
-1-j
-1+j
1+j
Submission
Slide 15
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Coding & Interleaving
Data
RS
coding
Quadrature
orthogonal
keying
Block
Interleaver
To RF
Scrambling code
Preamble
– Inner code: Reed-Solomon Code (221, 255)
• To overcome burst errors
– Outer code: Quadrature M-ary Orthogonal Keying (QMOK)
• 4/8 rate and ¾ rate selection
• Power efficient modulation
• Walsh-Hadamard Orthogonal code
– Fast Hadamard Transforms exist with low latency and low complexity
– Scrambler
• Same as that in 15.3 standard
Submission
Slide 16
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Quadrature M-ary Orthogonal Keying
(example 4/8 rate code)
Ai consists of 4 bits
A6 A4 A2 A0
A7 A6 A5 A4 A3 A2 A1 A0
4
4
4
4
4
4
4
B6
B4
B0
B2
4
4
4
4
Mapping
8
8
8
8
4
4
4
4
Mapping
8
8
8
8
4
A7 A5 A3 A1
B7
B5
B3
B1
Symbol (In)
Symbol (Out)
Symbol (In)
Symbol (Out)
0000
-1 -1 -1 -1 -1 -1 -1 -1
1000
1 1 1 1 1 1 1 1
0001
-1 1 -1 1 -1 1 -1 1
1001
1 -1 1 –1 1 –1 1 –1
0010
-1 -1 1 1 -1 -1 1 1
1010
1 1 –1 –1 1 1 –1 –1
0011
-1 1 1 -1 -1 1 1 -1
1011
1 –1 –1 1 1 –1 –1 1
0100
-1 -1 -1 -1 1 1 1 1
1100
1 1 1 1 –1 –1 –1 –1
0101
-1 1 -1 1 1 -1 1 –1
1101
1 –1 1 –1 –1 1 –1 1
0110
-1 -1 1 1 1 1 -1 –1
1110
1 1 –1 –1 –1 –1 1 1
0111
-1 1 1 -1 1 -1 -1 1
1111
1 -1 –1 1 –1 1 1 -1
Submission
I
Slide 17
Q
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
RF Transmitter Architecture
Lower frequency band
Data I
90o
Data Q
Bit
sequence
from
QMOK
encoder
De-MUX
Subband
select
LO 1
Data I
90o
Data Q
PNC ID based
TF Subband
Hopping Seq.
•
Subband
select
LO 2
Upper
frequency band
(Optional)
Upper frequency band may be in parallel to achieve high data rate
Submission
Slide 18
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Receiver RF Architecture & Noise Figure
Gain
Control
Antenna
Quad. Mixer
BPF
LPF
I
LNA VGA
-90°
LPF
Q
LO (Frequency depends on subband selector)
BPF
LNA and VGA
Quad. Mixer
LPF
Gain (dB)
-2
20
7
-2
N.F. (dB)
2
3.5
7
2
Cascaded (dB)
2
5.5
5.58
5.58
Submission
Slide 19
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Receiver Baseband Architecture
From
RF
ADC
Multichannel
Equalizer:
Scrambling
code
MultiDeInt.
channel
Equalizer
QMOK
Demap
RS
decoding
W
Demux.
Into
Subband
eqr
Adaptive
MMSE
For Subband
#1
P
/
S
W
Adaptive
MMSE
Submission
Slide 20
For Subband
#6
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Multi-Channel Equalizer
• Each of the parallel subband has a multi-channel MMSE Equalizer
• Each equalizer takes in the 4 oversamples within each Pulse
Repetition Interval, and combine with a 4-tap weight to give a output
complex symbol
• Each equaliser can suppress self-interference due to same sub-band
– upto 3 inter-pulse interference under large channel delay spread
• ~60 ns for CM1 & CM2
• ~120 ns for CM3
• ~240 ns for CM4
• Each equaliser can suppress upto 3 simultaneously operating
piconets (SOP) interferers using the same sub-band
• Recursive Least Square (RLS) adaptive algorithm is a good
candidate for the mutli-channel MMSE equalizer
– Fast convergence
– Efficient implementation
Submission
Slide 21
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Multi-Channel Equalizer - Complexity
• Each of the parallel subband has a multi-channel MMSE Equalizer
with Recursive Least Square (RLS) adaptive algorithm
• RLS can be implemented using systolic array structure
• Each array cell can be implemented in pipeline fashion
Submission
Slide 22
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Performance analysis
•
•
•
•
Link Budget
PHY-SAP Throughput
System Performance
Simultaneously Operating Piconets
Submission
Slide 23
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Link budget (6-band)
Operation Mode
Throughput
Range
F low
F high
Transmit ant gain
Receive ant gain
# Subbands
Throughput per Band
NF ref to Ant Terminal
Bandwidth
Ave transmit pwr
Peak transmit pwr
Geo centre freq
Path loss @1m
Path loss @ range
Receive power
Ave noise pwr /bit
Ave noise pwr (Pn)
Implementation loss
Eb/No in AWGN
Rx Sensitivity level
link margin (AWGN)
Multipath energy loss
Link margin (Multipath)
Channel Throughput Rc
Code rate
Mod (Bits/Sym)
PRF
Sampling rate
Submission
Mbps
m
GHz
GHz
dBi
dBi
Mbps
dB
GHz
dBm
dBm
GHz
dB
dB
dBm
dBm
dBm
dB
dBm
dBm
dB
dB
dB
Mbps
MHz
MHz
1
66.7
15
4.4
5
0
0
6
11.12
7
3
133.5
10
4.4
5
0
0
6
22.24
7
5
266.9
4
4.4
5
0
0
6
44.49
7
6
400.4
4
4.4
5
0
0
6
66.73
7
7
533.9
4
4.4
5
0
0
6
88.98
7
0.622
-13.3
-5.5
4.7
45.9
23.5
-74.9
-103.5
-96.5
5
4.0
-87.5
12.6
10
2.6
66.7
0.433333
2
77
308
0.622
-13.3
-5.5
4.7
45.9
20.0
-71.4
-100.5
-93.5
5
4.0
-84.5
13.1
10
3.1
133.5
0.433333
2
154
616
0.622
-13.3
-5.5
4.7
45.9
12.0
-63.4
-97.5
-90.5
5
4.0
-81.5
18.1
10
8.1
266.9
0.433333
2
308
1232
0.622
-13.3
-5.5
4.7
45.9
12.0
-63.4
-95.8
-88.8
5
6.8
-77.0
13.5
10
3.5
400.4
0.65
2
308
1232
0.622
-13.3
-5.5
4.7
45.9
12.0
-63.4
-94.5
-87.5
5
8.0
-74.5
11.1
10
1.1
533.9
0.866667
2
308
1232
Slide 24
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Frame Duration & PHY-SAP Throughput
T_PA_INITIAL
16 CAZAC Seq
T_SIFS
T_PA_CONT
16 CAZAC Seq
T_MIFS
T_MACHDR
80 bits
T_PHYHDR
16 bits
T_HCS
16 bits
T_MPDU
8160 bits
T_FCS
32 bits
Total Frame period (1st frame)
Total Frame period (subseq. Frame)
Payload_bits
R_Pay
#Frame for cal. Payload_Throughput_PHY_SAP (multi-pkt)
Payload_Throughput_PHY_SAP (single-pkt)
Payload_Throughput_PHY_SAP (multi-pkt)
Frame efficiency
#PilotSyms
#CAZAC Seq for Acquisition
# Subbands
Sampling rate
Oversampling
Code rate (Reed Sol.)
Code rate (MBOK)
Mod (Bits/Sym)
PRF or Channel Symbol Rate
Channel Throughput Rc
Submission
us
us
us
us
us
us
us
us
us
MHz
Mbps
Mbps
Mbps
MHz
MHz
MHz
Slide 25
19.948
9.974
4.987
4.987
4.987
10.000
10.000
10.000
10.000
10.000
19.948
9.974
4.987
4.987
4.987
2.000
2.000
2.000
2.000
2.000
1.558
1.558
1.558
1.558
1.558
0.312
0.312
0.312
0.312
0.312
0.312
0.312
0.312
0.312
0.312
122.278
61.139
30.569
20.380
15.285
0.480
0.240
0.120
0.080
0.060
145.303
73.742
37.962
27.732
22.617
145.095
73.638
37.910
27.680
22.565
8160
8160
8160
8160
8160
66.73328 133.4666 266.9331 400.3997 533.8663
5
5
5
5
5
52.683
97.684 170.504 216.858 250.973
54.954 105.789 196.825 261.301 312.482
0.823
0.793
0.737
0.653
0.585
32
32
32
32
32
16
16
16
16
16
6
6
6
6
6
308
616
1232
1232
1232
4
4
4
4
4
0.866666 0.866666 0.866666 0.866666 0.866666
0.5
0.5
0.5
0.75
1
2
2
2
2
2
77.00
154.00
308.00
308.00
308.00
66.73
133.47
266.93
400.40
533.87
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
System Performance
• Mode 1 (67Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 100 CM4 channels / 6-Band / NF = 7dB / Imp. Loss = 5dB
10
10
FER
FER
10
FER performance for CM4 (MMSE)
0
-1
10
FER performance for CM4 (RAKE)
0
-1
50%-tile
10%-tile
ave 90% (d =11.9m)
50%-tile
10%-tile
ave 90% (d =12.1m)
10
-2
0
5
Submission
10
15
Distance (m)
20
25
10
-2
0
Slide 26
5
10
15
Distance (m)
20
25
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
System Performance
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 100 CM3 channels / 6-Band / NF = 7dB / Imp. Loss = 5dB
10
FER performance for CM3 (MMSE)
0
10
-1
FER
FER
10
10
FER performance for CM3 (RAKE)
0
-1
50%-tile
10%-tile
ave 90% (d =11.2m)
10
50%-tile
10%-tile
ave 90% (d =10.8m)
-2
5
Submission
10
15
Distance (m)
20
25
30
10
-2
Slide 27
5
10
15
Distance (m)
20
25
30
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
System Performance
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 100 CM4 channels / 6-Band / NF = 7dB / Imp. Loss = 5dB
10
FER performance for CM4 (MMSE)
0
10
-1
FER
FER
10
10
-1
50%-tile
10%-tile
ave 90% (d =7.87m)
10
-2
5
Submission
10
15
Distance (m)
20
25
FER performance for CM4 (RAKE)
0
3010-2
Slide 28
50%-tile
10%-tile
ave 90% (d =6.89m)
5
10
15
Distance (m)
20
25
30
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
System Performance
• Mode 5 (267Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 100 CM2 channels / 6-Band / NF = 7dB / Imp. Loss = 5dB
10
FER performance for CM2 (MMSE)
0
10
FER
FER
10
-1
10
FER performance for CM2 (RAKE)
0
-1
50%-tile
10%-tile
ave 90% (d =8.34m)
50%-tile
10%-tile
ave 90% (d =9.37m)
10
10
-2
0
5
Submission
10
Distance (m)
15
-2
20
Slide 29
0
5
10
Distance (m)
15
20
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
System Performance
• Mode 7 (533Mbps payload, QPSK, RS (255,221))
• 100 CM1 channels / 6-Band / NF = 7dB / Imp. Loss = 5dB
10
FER performance for CM1 (MMSE)
0
10
FER
FER
10
-1
10
FER performance for CM1 (RAKE)
0
-1
50%-tile
10%-tile
ave 90% (d =5.34m)
10
50%-tile
10%-tile
ave 90% (d =4.88m)
-2
0
5
10
15
10
-2
Distance (m)
Submission
0
5
10
15
Distance (m)
Slide 30
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
System Performance
Equaliser vs RAKE (Mode 1 & 3)
Mode 1 (67Mbps)
Mode 3 (133Mbps)
Distance @ Ave. FER = 8% (Best 90 Chs)
Distance @ Ave. FER = 8% (Best 90 Chs)
20
14
MMSE
RAKE
18
MMSE
RAKE
12
16
10
12
Distance (m)
Distance (m)
14
10
8
6
8
6
4
4
2
2
0
1
2
3
Channel Model #
0
4
1
2
3
Channel Model #
4
• Performance gap widens when channel delay spread increases
– MMSE equaliser can better suppress ISI
Submission
Slide 31
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
System Performance
Equaliser vs RAKE (Mode 5 & 7)
Mode 5 (267Mbps)
Mode 7 (533Mbps)
Distance @ Ave. FER = 8% (Best 90 Chs)
Distance @ Ave. FER = 8% (Best 90 Chs)
6
10
MMSE
RAKE
MMSE
RAKE
9
5
8
4
Distance (m)
Distance (m)
7
6
5
4
3
2
3
2
1
1
0
1
2
3
Channel Model #
4
0
1
2
3
Channel Model #
4
•
RAKE receiver performance is ISI-limited (cannot achieve 8% FER however
short the link distance is)
•
Performance gap widens when channel delay spread increases and Eb/No requirement
increases (as in Mode 7)
Submission
Slide 32
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Objective: evaluate the multipath performance in the presence of
multiple uncoordinated piconets under the effects of
– Choice of Time-Frequency Hopping Sequence
– MMSE channel equalisation vs RAKE
• Performance Results
– dint/dref for each reference link in a given CM, each reference link over
each interfering link in another given CM
• e.g. 25 dint/dref values for 5 ref CM3 x 5 int CM4 (as backup materials)
– PER vs. dint/dref, averaged over all reference links in a given CM, each
reference link over all interfering links in another given CM
• e.g. 1 set of PER vs. dint/dref values for 5 ref CM3 x 5 int CM4 (as backup
materials)
– the minimum value of dint/dref for which the average PER is 8%, averaged
over all reference links in a given CM, each reference link over all
interfering links in another given CM
• e.g. 1 dint/dref value for 5 ref CM3 x 5 int CM4
Submission
Slide 33
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• All reference and interference links are normalised to unit
energy
• Reference link distance (dref) was half the 8% PER
distance (notionally giving 6 dB margin)
• Interfering link distance (dint) was varied from 8* dref to dref
/8
• Measure PER as a function of the ratio of dint to dref
Submission
Slide 34
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Ref. and interference link
–
–
–
–
Reference link: Channel 1-5 from each CM 1-4
1st interference link: Channel 6-10 from each CM 1-4
2nd interference link: Channel 11-15 from each CM 1-4
3rd interference link: Channel 16-20 from each CM 1-4
• 2nd and 3rd interference link do not use AWGN channels as stated in
selection criteria, as it may not be realistic enough
• 5 sets of Interference link channels
– Channel 6,11,16 of each interfering CMs represents first set
– Channel 7,12,17 of each interfering CMs represents second set, etc
– E.g. When N=2, channel 6&11 will be used for 1st and 2nd interference
links for first SOP interference scenario; channel 7&12 for second SOP
interference scenario, etc
Submission
Slide 35
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
Effect of TF Hopping Sequence Collision
Submission
Slide 36
Piconet #
'1 x N'
0
1
2
3
4
5
6
1
1
3
5
6
2
4
2
1
4
6
5
3
2
1
5
4
2
6
3
3
‘B x 1'
1
2
3
4
5
6
1
1
3
5
6
2
4
2
5
3
2
1
4
6
3
4
2
6
3
1
5
0
Piconet #
5 collision patterns
• '1 x N' - desired piconet has full collision
(from all SOP) in only 1 specific
subband
• 'B x 1' - desired piconet has at most one
collision in each sub-band
• 'B x N' - desired piconet has full
collisions in all subbands (worst case)
• 'B x 1/2' - desired piconet has “1/2”
collision (by ringing down subband
transmitted one PRI earlier in another
SOP) in all subbands
• 'B x 1/3' - desired piconet has “1/3”
collision (by ringing down subband
transmitted two PRI earlier in another
SOP) in all subbands
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
Effect of TF Hopping Sequence Collision
‘B x 1/3'
0
1
2
3
4
5
6
0
1
2
3
4
5
6
1
1
2
3
4
5
6
1
3
4
5
6
1
2
2
1
2
3
4
5
6
2
3
4
5
6
1
2
1
2
3
4
5
6
3
4
5
6
1
2
3
Piconet #
Piconet #
‘B x N'
3
Piconet #
‘B x 1/2'
0
1
2
3
4
5
6
1
2
3
4
5
6
1
2
2
3
4
5
6
1
2
3
4
5
6
1
3
Submission
Slide 37
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM1 int. Channels
di/dr corr. to CM3 Chs with FER = 8%
Effect of TF Seq. and Eqr. on Sim. Op. Piconets: Ref. Chs CM3 / Intf CM1
2.5
1xN
BxN
Bx1
B x 1/2
2
B x 1/3
1.5
1
0.5
0
Submission
MMSE
MMSE
MMSE
RAKE
RAKE
RAKE
N=1
N=2
N=3
N=1
N=2
N=3
Slide 38
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM2 int. Channels
di/dr corr. to CM3 Chs with FER = 8%
Effect of TF Seq. and Eqr. on Sim. Op. Piconets: Ref. Chs CM3 / Intf CM2
3
1xN
BxN
Bx1
2.5
B x 1/2
B x 1/3
2
1.5
1
0.5
0
Submission
MMSE
MMSE
MMSE
RAKE
RAKE
RAKE
N=1
N=2
N=3
N=1
N=2
N=3
Slide 39
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM3 int. Channels
di/dr corr. to CM3 Chs with FER = 8%
Effect of TF Seq. and Eqr. on Sim. Op. Piconets: Ref. Chs CM3 / Intf CM3
2.5
1xN
BxN
Bx1
B x 1/2
2
B x 1/3
1.5
1
0.5
0
Submission
MMSE
MMSE
MMSE
RAKE
RAKE
RAKE
N=1
N=2
N=3
N=1
N=2
N=3
Slide 40
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
di/dr corr. to CM3 Chs with FER = 8%
Effect of TF Seq. and Eqr. on Sim. Op. Piconets: Ref. Chs CM3 / Intf CM4
2.5
1xN
BxN
Bx1
B x 1/2
2
B x 1/3
1.5
1
0.5
0
Submission
MMSE
MMSE
MMSE
RAKE
RAKE
RAKE
N=1
N=2
N=3
N=1
N=2
N=3
Slide 41
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
SOP – Performance Analysis
• # interfering SOP
– Performance gets worse when # interfering SOP increases
• Equaliser vs RAKE
– Considerable performance gap
• 5x difference in dint/dref for CM1,CM2
• 3x difference in dint/dref for CM3,CM4
– Each sub-band equaliser can suppress self-interference due to same
sub-band
– Each sub-band equaliser can suppress upto 3 simultaneously operating
piconets (SOP) interferers using the same sub-band
• Effect of TF Hopping Sequence collision
– ‘B x N’ worst performance
– ‘1 x N’, ‘B x 1’, ‘B x 1/2 ‘ similar performance
– ‘B x 1/3’ > ‘1 x N’, ‘B x 1’, ‘B x 1/2‘ > ‘B x N’
Submission
Slide 42
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
SOP performance analysis
– impact on system design
• Adaptive equaliser
– Activate adaptive multi-channel equalisation algorithm in the
presence of SOP to improve performance
• Choice of Time-Frequency Hopping Sequence
– Avoid ‘B x N’ full collision from SOP in all subbands
– Random Time-Frequency Hopping Sequence based on PNC’s ID
is sufficient
Submission
Slide 43
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Implementation Feasibility
• The proposed multi-band approach is designed to reduce
the complexity and power consumption
– Re-use of same circuitry for different sub-bands leads to lesser
silicon area due to non-overlapped timing between sub-bands
• Shared LO, ADC, equalizer, etc..
– ADCs with lower sampling rate due for lower pulse rate, for lower
data rate
– reduction in number of bits requirement for ADC
• 4-tap equalizer and ‘QMOK decoding/despreading processing’ allows
the system to work satisfactorily even with four-bit ADCs
Submission
Slide 44
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Scalability
• Power consumption
– ADC sampling rate is proportional to pulse rate, thus lower power
at lower date rate
– Data rate increases with the number of bands used in the
transceiver, while system complexity remains the same
• Simultaneous transmission in low and high frequency
groups to double data rate
– Increases the cost of transmitter and receiver due to the presence
of a second local oscillator and an additional receiver chain
Submission
Slide 45
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Coexistence Plans
• Static control
– Frequency band for the devices should be configurable through
software based on the geographic locations
• Dynamic control
– UWB device will detect possible narrowband interference and
avoid the corresponding bands
• WLAN 802.11a bands
– Respective bands are avoided
• E.g: In Japan (4.9-5.25 GHz) in Europe/US (5.15-5.825 GHz)
Submission
Slide 46
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Narrowband Interference Plans
• Sub-bands should be scanned periodically to detect
narrowband interference
– Rely on adjacent channel rejection of filters + receiver signal
processing (e.g. multi-channel equaliser) to overcome
• Robust RF front end design
– Antenna
– Filters
– Component linearity requirements
Submission
Slide 47
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Flexibility
• Individual devices are adapted to interference without
coordination with other devices
• Easy adaptation for different regulatory environments
– Simply avoid the affected sub-band within geographical area
Submission
Slide 48
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Location awareness
• Accuracy and precision of ranging using UWB devices
– Is independent of “turn-around time” of the transmitter/receiver.
– Can rely on sub-ns transceiver clocking circuits.
– Is nearly independent of chosen UWB pulse width.
• Location information is calculated based on simultaneous
exchange of two messages between devices
– Time differences between sending and receiving messages are
computed for both the devices
– The physical distance between devices are proportional to the
time difference
Submission
Slide 49
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Summary
• Features of I2R’s Proposal on UWB multi-band system
– Spectrum flexibility
• Adapting to different regulatory requirements
• Coexistence with narrowband systems
• scalability in terms of number of bands employed
– Good performance with multipath and simultaneously operating
piconets
• Better interference suppression with the use of equaliser
• Minimum performance degradation even with random time-frequency
hopping sequence
– Low power / complexity solution
• Sampling rate and pulse rate proportional to data rate
– Minimal MAC supplements
Submission
Slide 50
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
802.15.3a Merge Work
Cooperating parties:
•
•
•
•
•
•
•
General Atomics
Intel Corporation
Philips
Staccato Communications
Time Domain
Wisair
Samsung
•
•
•
•
•
•
•
•
Appairent
Femto Devices
FOCUS Enhancement
Fujitsu
Infineon
Institute for Infocomm Research
Mitsubishi Electric
Taiyo Yuden R&D of America
Objectives:
• “Best” Technical Solution
• ONE Solution
• Excellent Business Terms
• Fast Time To Market
Submission
We encourage participation by
any party who can help us reach
our goals.
Slide 51
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Self evaluation
3.1
3.2.2
3.2.3
3.3.1
3.3.2
3.3.3
3.4
3.5
5.1
5.2.1
5.2.2
5.2.3
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
4.1
Submission
B
A
A
A
A
A
A
C
B
A
A
A
A
A
A
A
A
B
A
B
C
Unit Manufacturing Complexity (UMC)
Interference And Susceptibility
Coexistence
Manufacturability
Time To Market
Regulatory Impact
Scalability
Location Awareness
Size And Form Factor
Payload Bit Rate
Packet Overhead
PHY-SAP Throughput
Simultaneously Operating Piconets
Signal Acquisition
System Performance
Link Budget
Sensitivity
Power Management Modes
Power Consumption
Antenna Practicality
MAC Enhancements And Modifications
Slide 52
+
+
+
+
+
+
+
+
+
+
+
0
+
+
+
+
+
+
0
0
+
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Backup Materials
• SOP Performance Results (for 5 ref CM3 x 5 int CM4 )
– dint/dref for each reference link in a given CM, each reference link
over each interfering link in another given CM
• e.g. 25 dint/dref values for 5 ref CM3 x 5 int CM4
– PER vs. dint/dref, averaged over all reference links in a given CM,
each reference link over all interfering links in another given CM
• e.g. 1 set of PER vs. dint/dref values for 5 ref CM3 x 5 int CM4
Submission
Slide 53
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 1, TFMA Mode = ‘1 x N’
Intf CM4 Model / N = 1 / TFMA Mode = 1 x N
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
RAKE
MMSE
FER performance for CM3 (N = 1 Intf CM4 TFMA Mode = 1 x N)
0
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =0.5)
1.6
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1)
1.4
FER
1.2
1
10
-1
0.8
0.6
0.4
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 54
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 1, TFMA Mode = ‘B x N’
Intf CM4 Model / N = 1 / TFMA Mode = B x N
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
RAKE
MMSE
FER performance for CM3 (N = 1 Intf CM4 TFMA Mode = B x N)
0
1.6
1.4
FER
1.2
1
10
-1
0.8
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =0.69)
0.6
0.4
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.4)
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 55
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 1, TFMA Mode = ‘B x 1’
Intf CM4 Model / N = 1 / TFMA Mode = B x 1
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
RAKE
MMSE
FER performance for CM3 (N = 1 Intf CM4 TFMA Mode = B x 1)
0
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =0.5)
1.6
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1)
1.4
FER
1.2
1
10
-1
0.8
0.6
0.4
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 56
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 1, TFMA Mode = ‘B x ½’
Intf CM4 Model / N = 1 / TFMA Mode = B x 1/2
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
FER performance for CM3 (N = 1 Intf CM4 TFMA Mode = B x 1/2)
0
RAKE
MMSE
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =0.63)
1.6
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.1)
1.4
FER
1.2
1
10
-1
0.8
0.6
0.4
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 57
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 1, TFMA Mode = ‘B x 1/3’
Intf CM4 Model / N = 1 / TFMA Mode = B x 1/3
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
RAKE
MMSE
FER performance for CM3 (N = 1 Intf CM4 TFMA Mode = B x 1/3)
0
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =0.43)
1.6
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1)
1.4
FER
1.2
1
10
-1
0.8
0.6
0.4
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 58
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 2, TFMA Mode = ‘1 x N’
Intf CM4 Model / N = 2 / TFMA Mode = 1 x N
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
FER performance for CM3 (N = 2 Intf CM4 TFMA Mode = 1 x N)
0
RAKE
MMSE
1.6
1.4
FER
1.2
1
10
-1
0.8
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =1.1)
0.6
0.4
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.6)
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 59
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 2, TFMA Mode = ‘B x N’
Intf CM4 Model / N = 2 / TFMA Mode = B x N
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
FER performance for CM3 (N = 2 Intf CM4 TFMA Mode = B x N)
0
RAKE
MMSE
1.6
1.4
FER
1.2
1
10
-1
0.8
0.6
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =1.3)
0.4
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 60
-2
0
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.9)
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 2, TFMA Mode = ‘B x 1’
Intf CM4 Model / N = 2 / TFMA Mode = B x 1
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
FER performance for CM3 (N = 2 Intf CM4 TFMA Mode = B x 1)
0
RAKE
MMSE
1.6
1.4
FER
1.2
1
10
-1
0.8
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =0.99)
0.6
0.4
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.4)
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 61
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 2, TFMA Mode = ‘B x ½’
Intf CM4 Model / N = 2 / TFMA Mode = B x 1/2
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
FER performance for CM3 (N = 2 Intf CM4 TFMA Mode = B x 1/2)
0
RAKE
MMSE
1.6
1.4
FER
1.2
1
10
-1
0.8
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =1.2)
0.6
0.4
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.7)
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 62
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 2, TFMA Mode = ‘B x 1/3’
Intf CM4 Model / N = 2 / TFMA Mode = B x 1/3
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
RAKE
MMSE
FER performance for CM3 (N = 2 Intf CM4 TFMA Mode = B x 1/3)
0
1.6
1.4
FER
1.2
1
10
-1
0.8
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =0.85)
0.6
0.4
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.3)
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 63
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 3, TFMA Mode = ‘1 x N’
Intf CM4 Model / N = 3 / TFMA Mode = 1 x N
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
FER performance for CM3 (N = 3 Intf CM4 TFMA Mode = 1 x N)
0
RAKE
MMSE
1.6
1.4
FER
1.2
1
10
-1
0.8
0.6
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =1.5)
0.4
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 64
-2
0
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.8)
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 3, TFMA Mode = ‘B x N’
Intf CM4 Model / N = 3 / TFMA Mode = B x N
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
FER performance for CM3 (N = 3 Intf CM4 TFMA Mode = B x N)
0
RAKE
MMSE
1.6
1.4
FER
1.2
1
10
-1
0.8
0.6
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =1.6)
0.4
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 65
-2
0
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =2.1)
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 3, TFMA Mode = ‘B x 1’
Intf CM4 Model / N = 3 / TFMA Mode = B x 1
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
FER performance for CM3 (N = 3 Intf CM4 TFMA Mode = B x 1)
0
RAKE
MMSE
1.6
1.4
FER
1.2
1
10
-1
0.8
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =1.3)
0.6
0.4
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.5)
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 66
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 3, TFMA Mode = ‘B x ½’
Intf CM4 Model / N = 3 / TFMA Mode = B x 1/2
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
RAKE
MMSE
FER performance for CM3 (N = 3 Intf CM4 TFMA Mode = B x 1/2)
0
1.6
1.4
FER
1.2
1
10
-1
0.8
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =1.5)
0.6
0.4
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.9)
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 67
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2
May 2003
doc.: IEEE 802.15-03/107r4
Simultaneously Operating Piconets
• Mode 3 (133Mbps payload, QPSK, RS (255,221) + 4/8-rate QMOK)
• 5 CM3 ref. Channels x 5 sets of CM4 int. Channels
• N = 3, TFMA Mode = ‘B x 1/3’
Intf CM4 Model / N = 3 / TFMA Mode = B x 1/3
2
di/dr corr. to CM3 Chs with FER = 8%
1.8
10
RAKE
MMSE
FER performance for CM3 (N = 3 Intf CM4 TFMA Mode = B x 1/3)
0
1.6
1.4
FER
1.2
1
10
-1
0.8
0.6
MMSE 50%-tile
MMSE 10%-tile
MMSE ave (di/dr =1.2)
0.4
RAKE 50%-tile
RAKE 10%-tile
RAKE ave (di/dr =1.6)
0.2
0
5
Submission
10
15
Channel #
20
25
10
Slide 68
-2
0
0.5
1
di/dr
1.5
Francois Chin, Madhukumar, Xiaoming Peng, Sivanand, I2R
2