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March 2003 doc.: IEEE 802.15-03/143 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks ( etworks (WPANs WPANs) ) Project: IEEE P802.15 Working Group for Wireless Personal Area N Submission Title: [Time Domains Proposal

slide-1
SLIDE 1

March 2003

Joy Kelly, Time Domain Corporation Slide 1

doc.: IEEE 802.15-03/143

Submission

Project: IEEE P802.15 Working Group for Wireless Personal Area N Project: IEEE P802.15 Working Group for Wireless Personal Area Networks ( etworks (WPANs WPANs) )

Submission Title: [Time Domain’s Proposal for UWB Multi-band Alternate Physical Layer for 802.15.3a] Date Submitted: [3 March, 2003] Source: [Joy Kelly] Company [Time Domain Corporation] Address [7057 Old Madison Pike, Huntsville, AL 35802 US] Voice:[256-428-6576], FAX: [256-428-6785], E-Mail:[joy.kelly@timedomain.com] Re: [802.15.3a Call for Proposals] Abstract: [This presentation summarizes Time Domain’s UWB Multi-band proposal for the 802.15.3a Alternate PHY standard.] Purpose: [The presentation responds to the Call for Proposals issued by TG 802.15.3a, in consideration for the 802.15.3 Alternate PHY 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. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

slide-2
SLIDE 2

March 2003

Joy Kelly, Time Domain Corporation Slide 2

doc.: IEEE 802.15-03/143

Submission

Time Domain Corporation Proposal for UWB Multi-band Alternate Physical Layer for TG 802.15.3a

slide-3
SLIDE 3

March 2003

Joy Kelly, Time Domain Corporation Slide 3

doc.: IEEE 802.15-03/143

Submission

Key Selection Criteria Performance Metrics for WPAN Alt PHY

  • Cost
  • Power consumption
  • High data rates
  • Channelization
  • Performance in multipath
  • Interference rejection
  • Coexistence
slide-4
SLIDE 4

March 2003

Joy Kelly, Time Domain Corporation Slide 4

doc.: IEEE 802.15-03/143

Submission

Overview of UWB Solution Space

f

Dual Band

f

Dual Band

f

Impulse

f

Impulse

f

Notched Impulse

f

Notched Impulse

f

Multi-band

f

Multi-band

slide-5
SLIDE 5

March 2003

Joy Kelly, Time Domain Corporation Slide 5

doc.: IEEE 802.15-03/143

Submission

Time Domain’s Multi-band Solution

  • Flexible spectrum use
  • Time-frequency (TF) codes for multiple access

(TFMA)

  • Simple modulation schemes
  • Standard Forward Error Correction (FEC)
  • Graceful scalability with backward compatibility
  • Strategies for increased multiple access

capability in harsh environments

slide-6
SLIDE 6

March 2003

Joy Kelly, Time Domain Corporation Slide 6

doc.: IEEE 802.15-03/143

Submission

  • ~520 MHz bands to best utilize spectrum
  • 437 MHz band separation
  • Adjacent band isolation: ~ 12 dB

– Second band over is ~ 21 dB down

  • Center frequencies chosen for ease of implementation

1 2 3 4 5 6 7

Reserved

9 10 11 12 13 14 15 Low Frequency Group High Frequency Group

Flexible Spectrum Use

Sacrifice 1 band for WLAN coexistence (dependent upon geographical location) Unexpected Interferer

slide-7
SLIDE 7

March 2003

Joy Kelly, Time Domain Corporation Slide 7

doc.: IEEE 802.15-03/143

Submission

Signal Design Using 7 Bands

  • 3.9 ns chip time

2 1 1 2 0.5 1

Rectified Cosine Pulse Shape

Time (ns) Amplitude (volts)

  • Rectified cosine envelope

2 1.5 1 0.5 0.5 1 1.5 2 0.1 0.1

Band 0 Sinewave Carrier

Time (ns) Amplitude (Volts)

2 1 1 2 0.2 0.2

Band 0 Chip Waveform

Time (ns) Amplitude (Volts 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4 55 52.5 50 47.5 45 42.5 40

Band 0 Frequency Spectrum Shape

Frequency (GHz) Normalized Amplitude (dB)

x

slide-8
SLIDE 8

March 2003

Joy Kelly, Time Domain Corporation Slide 8

doc.: IEEE 802.15-03/143

Submission

Length 7 Time-Frequency Code

  • Time-Frequency Multiple Access (TFMA) radio
  • One frequency on the air at a time

– Enables simplicity in receiver architecture – Provides low power solution

3.89 ns chip time

Code duration 27.23 ns

1 2 3

5 6 4

1 2 3

slide-9
SLIDE 9

March 2003

Joy Kelly, Time Domain Corporation Slide 9

doc.: IEEE 802.15-03/143

Submission

Time-Frequency Code Design

  • Length 7 time-frequency codes
  • Linear congruential design
  • 6 codes in family
  • At most one collision between

any two length 7 codes (provides 17 dB code isolation)

  • Length 7 time-frequency codes provide good multipath

resistance (approx 27 ns environment ring down)

  • Yields 6 unique piconets

time

chip

time

chip

Code 0 Code 1 Code 2 Code 3 Code 4 Code 5

7 Bands

1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3

4 5 6 4 6 5 6 5 4 4 5 6 5 6 4 6 5 4

1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3

4 Bands

1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3

5 Bands

1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3

4 4 4 4 4 4

1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3

6 Bands

1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3

4 5 4 5 5 4 4 5 5 4 5 4

1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3

7 Bands

1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3

4 5 6 4 6 5 6 5 4 4 5 6 5 6 4 6 5 4

1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3

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SLIDE 10

March 2003

Joy Kelly, Time Domain Corporation Slide 10

doc.: IEEE 802.15-03/143

Submission

Data Modulation

  • Use low order modulation for simplicity and

reasonable dynamic range requirements

– BPSK – QPSK

  • Apply modulation on a per-chip basis
  • Length 7 code (using all frequencies) yields

raw data rates

– 257 Mb/s for BPSK – 514 Mb/s for QPSK

slide-11
SLIDE 11

March 2003

Joy Kelly, Time Domain Corporation Slide 11

doc.: IEEE 802.15-03/143

Submission

Forward Error Correction (FEC)

  • Convolutional encoder

– ½ rate – ¾ rate

  • Constraint length 7
  • Industry standard generating polynomials
  • Spreads each bit across spectrum
  • Multi-band method with per-band modulation

enables weighting of each frequency band in soft decision

slide-12
SLIDE 12

March 2003

Joy Kelly, Time Domain Corporation Slide 12

doc.: IEEE 802.15-03/143

Submission

Modulation Schemes

  • 8 modulation combinations defined

– Fits within existing 3-bit PHY Header field

7 Bands 14 Bands

  • Frequency

Integration

257

Payload Bit Rate (Mb/s) Modulation Scheme

514 257 128 37

4 Bands

FEC QPSK BPSK Index

1028 294

None

  • 7

514 147

½ Rate

  • 5

73

½ Rate

  • 3

37 37

None

  • 0*

*Mode 0 is base rate: used for all header /beacon / CAP signaling

slide-13
SLIDE 13

March 2003

Joy Kelly, Time Domain Corporation Slide 13

doc.: IEEE 802.15-03/143

Submission

Flexibility of Multi-band: Dynamic Band Management

  • Monitor and report per-band performance
  • Detect spectral problems, if any
  • Four categories

– Narrowband interferer – Channel fading – Nearby interfering piconet (near/far) – Multiple near-proximity piconets in extreme multipath

slide-14
SLIDE 14

March 2003

Joy Kelly, Time Domain Corporation Slide 14

doc.: IEEE 802.15-03/143

Submission

Solution for Narrowband Interference & Channel Fading

  • Coordinate between DEVs within piconet

to drop affected bands

0 1 2 3 4 5 6 0 1 2 3 4 5 6

Example: Band 4 dropped

4 4

slide-15
SLIDE 15

March 2003

Joy Kelly, Time Domain Corporation Slide 15

doc.: IEEE 802.15-03/143

Submission

Solution for Nearby Interfering Piconet & Multiple Piconets in Extreme Multipath

  • TF codes provide 17dB

code isolation between channels in freespace

  • In extreme situations,

additional isolation required

  • Activate FDMA (frequency

division multiple access) strategy

  • Continue using same TF

codes

  • Return to TFMA when

conditions permit

Near-Far Conditions CM4 CIR Plot (Example)

slide-16
SLIDE 16

March 2003

Joy Kelly, Time Domain Corporation Slide 16

doc.: IEEE 802.15-03/143

Submission

Scalability: Very High Data Rates

  • Codes are re-used in upper frequency group
  • Enables 14-band DEVs allowing > 1 GHz raw

data rate

  • Requires transmission and reception of two

bands simultaneously

R e s e r v e d

Code Group A Code Group B

slide-17
SLIDE 17

March 2003

Joy Kelly, Time Domain Corporation Slide 17

doc.: IEEE 802.15-03/143

Submission

Scalability & Flexibility:

Within a Piconet

  • Signaling design enables DEVs of different capability

within a piconet to communicate

  • Band assessment, negotiation easily enabled via

minimal MAC supplements

  • Enables products of varying capabilities to be tailored

for different applications 0 1 2 3 4 5 6 0 1 2 3 4 5 6 0 1 2 3 4 5 6

DEV 1 DEV 2 DEV 3

0’ 1’ 2’ 3’ 4’ 5’ 6’

slide-18
SLIDE 18

March 2003

Joy Kelly, Time Domain Corporation Slide 18

doc.: IEEE 802.15-03/143

Submission

  • Code collision property holds for 14 bands
  • 1 collision in 7; 2 in 14
  • Each piconet is independently configured
  • Reconfiguring a given piconet does not adversely

affect the other piconets

Example: 0 1 2 3 4 5 6 0 3 6 2 5 1 4 0 6 5 4 3 2 1 0’ 1’ 2’ 3’ 4’ 5’ 6’ 0’ 3’ 6’ 2’ 5’ 1’ 4’ 0’ 6’ 5’ 4’ 3’ 2’ 1’

code group B code group B

Scalability:

Uncoordinated Piconets

code group A code group A

Piconet 1 Piconet 6

slide-19
SLIDE 19

March 2003

Joy Kelly, Time Domain Corporation Slide 19

doc.: IEEE 802.15-03/143

Submission

Filter Detect A to D Convert (only 5 bits) Baseband Generate Multi-band Frequencies LNA

I & Q Signals

VGA Waveform Generator Power Amp Power Amp Data Data

Blocks required for all UWB implementations Blocks required for multi-band implementations

T/R

Example Implementation

slide-20
SLIDE 20

March 2003

Joy Kelly, Time Domain Corporation Slide 20

doc.: IEEE 802.15-03/143

Submission

Supporting Text Key Points Not Covered in Presentation

  • Acquisition performance and timeline
  • MAC enhancements
  • Power consumption
  • Packet definition
  • More extensive analysis & simulation

results

slide-21
SLIDE 21

March 2003

Joy Kelly, Time Domain Corporation Slide 21

doc.: IEEE 802.15-03/143

Submission

Summary Performance Results from Selection Criteria

  • Link budget
  • System Performance
  • Simultaneous Operating Piconets
  • Coexistence
  • Interference Susceptibility
  • Power Consumption
  • Regulatory Impact
slide-22
SLIDE 22

March 2003

Joy Kelly, Time Domain Corporation Slide 22

doc.: IEEE 802.15-03/143

Submission

Link Budget

  • Determine free space AWGN link budget

margin for Multi-band radio

  • Noise figure estimated at 7 dB
  • Implementation loss estimated at 5 dB
  • Receiver sensitivity is dependent on

modulation type

  • Data rates as high as 294 Mb/s for 4 band

radio, 514 Mb/s for 7 band radio, and 1 Gb/s for 14 band radio

slide-23
SLIDE 23

March 2003

Joy Kelly, Time Domain Corporation Slide 23

doc.: IEEE 802.15-03/143

Submission

Link Budget Margin

7 Bands

6.41 dB @ 2 m 514.12 7 QPSK, no FEC, no time integration, no frequency integration 7 5.19 dB @ 4 m 385.60 7 QPSK, ¾ rate FEC, no time integration, no frequency integration 6 8.44 dB @ 4 m 257.06 7 QPSK, ½ rate FEC, no time integration, no frequency integration 5 8.20 dB @ 4 m 192.79 7 BPSK, ¾ rate FEC, no time integration, no frequency integration 4 3.50 dB @ 10 m 128.53 7 BPSK, ½ rate FEC, no time integration, no frequency integration 3 7.85 dB @ 10 m 55.08 7 QPSK, ¾ rate FEC, no time integration, integrate all frequency bands 2 6.50 dB @ 10 m 64.26 7 BPSK, ½ rate FEC, time integration = 2, no frequency integration 1 6.01 dB @ 10 m 36.72 7 BPSK, No FEC, no time integration, integrate all frequency bands Link Budget Margin Payload Bit Rate Number

  • f

Bands Modulation Scheme Index

slide-24
SLIDE 24

March 2003

Joy Kelly, Time Domain Corporation Slide 24

doc.: IEEE 802.15-03/143

Submission

Link Budget Margin

7-Band Radio

1 2 3 4 5 6 7 8 9 64.26 Mb/s @ 10m, 7 Band 128.53 Mb/s @ 10m, 7 Band 257.06 Mb/s @ 4m, 7 Band 514.12 Mb/s @ 2m, 7 Band Free Space Margin (dB)

MODE 1 MODE 3 MODE 5 MODE 7

slide-25
SLIDE 25

March 2003

Joy Kelly, Time Domain Corporation Slide 25

doc.: IEEE 802.15-03/143

Submission

  • Operates primarily in the time domain
  • Signals sampled at 100GHz
  • Packet-oriented, i.e. for each packet:

– Adjusts gain – Thresholds preamble to acquire, characterizes received signal for demodulation – Demodulates and check-sums Header and Payload – Decodes using Viterbi algorithm

  • Describes an implementation model, not an ideal

mathematical model:

  • 7 dB Noise Figure
  • ADC Quantization (5 bits)
  • Real-time AGC algorithm
  • Signal compression
  • Realistic receive templates
  • Non-ideal channel estimation
  • Limited data-path precision
  • Phase errors

Simulator Description

slide-26
SLIDE 26

March 2003

Joy Kelly, Time Domain Corporation Slide 26

doc.: IEEE 802.15-03/143

Submission

System Performance

  • Objective is to measure single-link performance

in multipath

  • Results simulated for all 400 CIRs in CMs 1-4

– 10 distances simulated per CIR (from 24 m to 1 m) – 200 packets/run – 1024 octet payload – Results represent simulation of over 10 Gbits data

  • Results presented for

– 128 Mb/s and 257 Mb/s operation – No RAKE and two-finger RAKE

slide-27
SLIDE 27

March 2003

Joy Kelly, Time Domain Corporation Slide 27

doc.: IEEE 802.15-03/143

Submission

1 2 3 4 2 4 6 8 10 12 14 16

Average distance at which PER = 8%, Best 90 Channels CIR Category Distance (m) 15.3 13.3 10.7 5.3

LOS 0 to 4 NLOS 0 to 4 NLOS 4 to 10 Rms 25

System Performance 128.4Mb/s - One Rake Finger

  • 7 bands (skips

UNII band)

  • 100 CIR’s

from each of CM1 – CM4

  • 200 packets
  • 7dB Noise

Figure

  • Path-loss

exponent of 2.0 in all cases

  • BPSK, ½-rate

FEC

  • No rake
slide-28
SLIDE 28

March 2003

Joy Kelly, Time Domain Corporation Slide 28

doc.: IEEE 802.15-03/143

Submission

1 2 3 4 2 4 6 8 10 12 14 16 18 20 Average distance at which PER = 8%, Best 90 Channels

CIR Category Distance (m) 17.7 16.0 13.6 7.7

LOS 0 to 4 NLOS 0 to 4 NLOS 4 to 10 Rms 25

System Performance

128.4Mb/s – Two Rake Fingers

  • 7 bands (skips

UNII band)

  • 100 CIR’s

from each of CM1 – CM4

  • 200 packets
  • 7dB Noise

Figure

  • Path-loss

exponent of 2.0 in all cases

  • BPSK, ½-rate

FEC

  • 2 Rake teeth
slide-29
SLIDE 29

March 2003

Joy Kelly, Time Domain Corporation Slide 29

doc.: IEEE 802.15-03/143

Submission 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 Average distance at which PER = 8%, Best 90 Channels

CIR Category Distance (m) 9.9 8.1 5.2 1.1

LOS 0 to 4 NLOS 0 to 4 NLOS 4 to 10 Rms 25

System Performance

256.7Mb/s – One Rake Finger

  • 7 bands (skips

UNII band)

  • 100 CIR’s

from each of CM1 – CM4

  • 200 packets
  • 7dB Noise

Figure

  • Path-loss

exponent of 2.0 in all cases

  • QPSK, ½-rate

FEC

  • No rake
slide-30
SLIDE 30

March 2003

Joy Kelly, Time Domain Corporation Slide 30

doc.: IEEE 802.15-03/143

Submission

System Performance

256.7Mb/s – Two Rake Fingers

  • 7 bands (skips

UNII band)

  • 100 CIR’s

from each of CM1 – CM4

  • 200 packets
  • 7dB Noise

Figure

  • Path-loss

exponent of 2.0 in all cases

  • QPSK, ½-rate

FEC

  • 2 Rake teeth

1 2 3 4 2 4 6 8 10 12 14 Average distance at which PER = 8%, Best 90 Channels

CIR Category Distance (m) 12.2 10.8 8.5 3.2

LOS 0 to 4 NLOS 0 to 4 NLOS 4 to 10 Rms 25

slide-31
SLIDE 31

March 2003

Joy Kelly, Time Domain Corporation Slide 31

doc.: IEEE 802.15-03/143

Submission

Simultaneously Operating Piconets

  • Objective is to evaluate uncoordinated piconet

channelization in multipath

  • N = 1 interferer case examined here
  • Five different sets of CIRs for the reference link are

being used:

– Freespace – To make simulation times feasible, representative channels from CMs 1-4 were chosen based on the quintiles of System Performance results:

  • CM1 representatives

– CIRs 3, 59, 83, 81, and 40

  • CM2 representatives

– CIRs 8, 56, 42, 31, and 58

  • CM3 representatives

– CIRs 26, 39, 11, 60, and 62

  • CM4 representatives

– CIRs 64, 79, 18, 52, 57

  • These representative channels were

used as the reference links for the SOP simulations

  • The quality of the reference link will

impact SOP performance. This procedure allows us to quantify the effect.

  • These representative channels were

used as the reference links for the SOP simulations

  • The quality of the reference link will

impact SOP performance. This procedure allows us to quantify the effect.

slide-32
SLIDE 32

March 2003

Joy Kelly, Time Domain Corporation Slide 32

doc.: IEEE 802.15-03/143

Submission

Choosing the Reference Channels

  • Choice based on

System Performance Results

  • Link distance at which

8% PER was attained is recorded for each CIR in each CM.

  • CDF of the 8% PER

distance constructed

  • Representative

channels from each CM are the quintiles

  • f the corresponding

CDF

CDFs of 8% PER Distance for CMs 1-4

System Performance Results

7 Band, BPSK, R = ½, 128.4 Mb/s

10 20 30 40 50 60 70 80 90 100 0.00 5.00 10.00 15.00 20.00 25.00 30.00 distance (m) percent CM1 CM2 CM3 CM4

CM1 CM1 CM2 CM2 CM3 CM3 CM4 CM4

slide-33
SLIDE 33

March 2003

Joy Kelly, Time Domain Corporation Slide 33

doc.: IEEE 802.15-03/143

Submission

Simultaneously Operating Piconets

  • Freespace reference link simulated against all

300 CIRs from CMs 1-3 as the interfering links.

  • All other representative reference links were

simulated against 60 interfering links from channel models 1-4. – 15 links from each of channel models 1-4.

  • Reference link distance is set at half the 8% PER

distance (providing notionally a 6 dB margin).

  • Interfering link is walked in.
  • PER is recorded as a function of the ratio of the

interfering link distance to the reference link distance.

slide-34
SLIDE 34

March 2003

Joy Kelly, Time Domain Corporation Slide 34

doc.: IEEE 802.15-03/143

Submission

  • Num. Bands

Modulation Data Rate Reference Link Interfering Links 7 BPSK, ½-rate FEC 128.5 Mb/s freespace freespace

Simultaneously Operating Piconets N = 1 interferer

slide-35
SLIDE 35

March 2003

Joy Kelly, Time Domain Corporation Slide 35

doc.: IEEE 802.15-03/143

Submission

  • Num. Bands

Modulation Data Rate Reference Link Interfering Links 7 BPSK, ½-rate FEC 128.5 Mb/s Freespace, 10 m All CIRs in CMs 1-3

Simultaneously Operating Piconets N = 1 interferer Average performance in CMs 1-3 Average performance in CMs 1-3

slide-36
SLIDE 36

March 2003

Joy Kelly, Time Domain Corporation Slide 36

doc.: IEEE 802.15-03/143

Submission

  • Num. Bands

Modulation Data Rate Reference Link Interfering Links 7 BPSK, ½-rate FEC 128.5 Mb/s CM1, CIR 3 CMs 1-4, CIRs 11-25

Simultaneously Operating Piconets N = 1 interferer Average performance in CMs 1-4, CIRs 11-25 Average performance in CMs 1-4, CIRs 11-25 100th percentile System Performance CIR 100th percentile System Performance CIR

slide-37
SLIDE 37

March 2003

Joy Kelly, Time Domain Corporation Slide 37

doc.: IEEE 802.15-03/143

Submission

80th percentile System Performance CIR 80th percentile System Performance CIR

  • Num. Bands

Modulation Data Rate Reference Link Interfering Links 7 BPSK, ½-rate FEC 128.5 Mb/s CM1, CIR 59 CMs 1-4, CIRs 1-15

Simultaneously Operating Piconets N = 1 interferer Average performance in CMs 1-4, CIRs 1-15 Average performance in CMs 1-4, CIRs 1-15

slide-38
SLIDE 38

March 2003

Joy Kelly, Time Domain Corporation Slide 38

doc.: IEEE 802.15-03/143

Submission

20th percentile System Performance CIR 20th percentile System Performance CIR Simultaneously Operating Piconets N = 1 interferer Average performance in CMs 1-4, CIRs 81-95 Average performance in CMs 1-4, CIRs 81-95

  • Num. Bands

Modulation Data Rate Reference Link Interfering Links 7 BPSK, ½-rate FEC 128.5 Mb/s CM3, CIR 62 CMs 1-4, CIRs 81-95

slide-39
SLIDE 39

March 2003

Joy Kelly, Time Domain Corporation Slide 39

doc.: IEEE 802.15-03/143

Submission

Interpretation of SOP results

  • Quality of reference link has more impact on

SOP performance than nature of interfering channel:

  • Ref. link

CM1 CM2 CM3 0.38 0.64 0.60 1.4 1.15 1.63 1.65 1.55

  • 100th percentile

60th percentile 20th percentile

  • Sys. Perf. Rank

Average 8% PER Distance Ratios from Simultaneously Operating Piconet Test

Reference link from …

slide-40
SLIDE 40

March 2003

Joy Kelly, Time Domain Corporation Slide 40

doc.: IEEE 802.15-03/143

Submission

Strategies for Enhanced Channelization in Harsh Environments

  • For significant fading on bands, drop the

faded bands

  • For very severe multipath and/or near-

far scenarios, use FDMA Both strategies yield dramatic improvement in SOP performance

slide-41
SLIDE 41

March 2003

Joy Kelly, Time Domain Corporation Slide 41

doc.: IEEE 802.15-03/143

Submission

Performance before dropping weak bands… Performance before dropping weak bands… Average performance in CMs 1-4, CIRs 81-95 Average performance in CMs 1-4, CIRs 81-95

  • Num. Bands

Modulation Data Rate Reference Link Interfering Links 7 BPSK, ½-rate FEC 128.5 Mb/s CM1, CIR 40 CMs 1-4, CIRs 81-95

20th percentile System Performance CIR 20th percentile System Performance CIR

slide-42
SLIDE 42

March 2003

Joy Kelly, Time Domain Corporation Slide 42

doc.: IEEE 802.15-03/143

Submission

Average performance in CMs 1-4, CIRs 81-95 Average performance in CMs 1-4, CIRs 81-95

  • Num. Bands

Modulation Data Rate Reference Link Interfering Links 4 (0, 2, 6, 7) BPSK, ½-rate FEC 73.4 Mb/s CM1, CIR 40 CMs 1-4, CIRs 81-95 (interferer still transmitting on all bands)

Performance after dropping weak bands… Performance after dropping weak bands… 20th percentile System Performance CIR

  • SOP performance now

comparable to 80th percentile CIR

20th percentile System Performance CIR

  • SOP performance now

comparable to 80th percentile CIR

slide-43
SLIDE 43

March 2003

Joy Kelly, Time Domain Corporation Slide 43

doc.: IEEE 802.15-03/143

Submission

Average performance in CMs 1-4, CIRs 81-95 Average performance in CMs 1-4, CIRs 81-95

  • Num. Bands

Modulation Data Rate Reference Link Interfering Links 4 (0, 2, 6, 7) BPSK, ½-rate FEC 146.75 Mb/s CM1, CIR 40 CMs 1-4, CIRs 81-95 (interferer transmitting on bands 1, 3, 5)

Performance after FDMA… Performance after FDMA… 20th percentile System Performance CIR

  • SOP performance now comparable

to 100th percentile CIR

20th percentile System Performance CIR

  • SOP performance now comparable

to 100th percentile CIR

slide-44
SLIDE 44

March 2003

Joy Kelly, Time Domain Corporation Slide 44

doc.: IEEE 802.15-03/143

Submission

Simultaneous Operating Piconet Simulation Results Summary

  • Time-frequency codes as implemented

provide 8-10 dB of isolation between piconets in freespace.

  • Multipath will decrease piconet isolation.
  • Piconet isolation is enhanced by dropping

severely faded bands in a multipath environment.

  • FDMA techniques are employed in near/far

and severe multipath scenarios.

slide-45
SLIDE 45

March 2003

Joy Kelly, Time Domain Corporation Slide 45

doc.: IEEE 802.15-03/143

Submission

Coexistence

  • Determined 802.15.3a impact to 802.11a,

802.11b, 802.15.1, 802.15.3, and 802.15.4

  • Receiver impact based on AWGN analysis
  • Minimize impact to selected wireless standards

by modifying the FCC indoor/handheld emission mask

  • Banded approach naturally reduces emissions in

the selected bands thereby reducing the additional filtering needs in the 802.15.3a radio implementation

slide-46
SLIDE 46

March 2003

Joy Kelly, Time Domain Corporation Slide 46

doc.: IEEE 802.15-03/143

Submission

Coexistence Calculations

Wireless Service 802.11b 802.15.1 802.15.3 802.15.4 802.11a Frequency of Operation (GHz) 2.4 - 2.484 2.4 - 2.484 2.4 - 2.484 2.4 - 2.484 5.15 - 5.35 Mod Type DSSS CCK GFSK DQPSK OQSPK BPSK Wireless Receive Antenna Gain (dBi) Wireless Service Rec. NF (dB) 1 2 3 1 2 15 10 Wireless Service NBW (MHz) 2 2 1 1 2 2.5 16.6 K T

@25°C

(dBm/MHz)

  • 174
  • 174
  • 174
  • 174
  • 174

Wireless Service Rec. Noise Floor (dBm)

  • 90.58
  • 91.00
  • 91.21
  • 95.02
  • 91.80

Data Rate (Mb/s) 1 1 1 2 2 0.25 6 Wireless Service Implementation Loss (dB) 4 3 4 5 5 Wireless Service Coding gain (dB) 5 5.1 Wireless Service BER 1.00E-05 1.00E-05 1.00E-05 1.00E-05 1.00E-05 Wireless Service Eb/No@BER (dB) 10.6 18.0 12.0 10.0 9.6 Wireless Service Rec. Sensitivity (dBm) no UWB

  • 75.98
  • 70.00
  • 75.21
  • 85.02
  • 82.30

UWB EIRP (dBm/MHz) Minimum Criteria Mask (*1)

  • 61.3
  • 61.3
  • 61.3
  • 61.3
  • 53.8

UWB EIRP (dBm/MHz) Desired Criteria Mask (*1)

  • 65.9
  • 65.9
  • 65.9
  • 65.9
  • 64.3

FCC Handheld UWB EIRP Limit (dBm/MHz)

  • 61.3
  • 61.3
  • 61.3
  • 61.3
  • 41.3

Wireless Service Rec. Sensitivity (dBm) with Minumum Criteria UWB

  • 71.44
  • 69.62
  • 71.86
  • 83.03
  • 77.35

Wireless Service Rec. Sensitivity (dBm) with Desired Criteria UWB

  • 66.89
  • 68.68
  • 67.82
  • 79.91
  • 77.38

Notes: *1) The EIRP density values are the smallest values of a comparison between the FCC handheld limit and the individual wireless service coexistence calculations.

slide-47
SLIDE 47

March 2003

Joy Kelly, Time Domain Corporation Slide 47

doc.: IEEE 802.15-03/143

Submission

Coexistence with IEEE 802.11a

802.15.3a Impact to 802.11a Receiver Sensitivity

  • 25
  • 20
  • 15
  • 10
  • 5

5 10 15 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Distance from Receiver, dint, (m) UWB Equivalent AWGN Power re Receiver Sensitivity (dBm) UWB AWGN Power in Receiver's Bandwidth re (-82.3 dBm) Total Receiver Noise Floor re (-82.3 dBm) Receiver Sensitivity Desired Criteria Distance Minimum Criteria Distance I = UWB AWGN Interference Power re Receiver Sensitivity Receiver Sensitivity Impact

UWB Equivalent AWGN Power Relative to Receiver Sensitivity (PUWB – PRx)

slide-48
SLIDE 48

March 2003

Joy Kelly, Time Domain Corporation Slide 48

doc.: IEEE 802.15-03/143

Submission

Interference Susceptibility Analysis

  • IEEE 802.11 a, IEEE 802.11 b, IEEE 802.15.4, Bluetooth and Microwave oven
  • Interference models were incorporated into the simulator and analog front-end

attenuation factors were determined for each interferer

  • The simulations were carried out using a receiver template with a rectangular envelope
  • Signal linearity with very wide dynamic range was assumed
  • Simulation results using an analog front-end filter and with mixer limitations will be

presented in May

  • Generic In-Band Tone and Modulated Interferers
  • Interference models were incorporated into the simulator and the received power of the

interferer was varied for different center frequencies

  • There was a good correspondence between the receiver template frequency response at

the center frequency of the interferer and the observed performance

  • The analysis was done assuming the sub-band overlapping with the interferer will not

be used

  • The effect of not dropping the overlapping sub-band was also analyzed
slide-49
SLIDE 49

March 2003

Joy Kelly, Time Domain Corporation Slide 49

doc.: IEEE 802.15-03/143

Submission

Interference Susceptibility due to IEEE 802.11a Interferer

Attenuation requirements for the Analog Front-End

  • 25 dB for Minimum criteria
  • 35.4 dB for Desired criteria

0.5 1 1.5 2 10 10

1

10

2

Distance between 802.11a Tx and UWB Rx (m) PER Desired criteria Minimum criteria

slide-50
SLIDE 50

March 2003

Joy Kelly, Time Domain Corporation Slide 50

doc.: IEEE 802.15-03/143

Submission

Power consumption

20 mW Power save mode Power save 225 mW Clear channel assessment CCA 190mW Transmitting ( any data rate ) Active Tx 325 mW Receiving @ 257 Mbit/sec Active RX 275 mW Receiving @ 128.5 Mbit/sec Active Rx 80 mW Preparing for Tx or Rx, programming registers Tx/Rx Prep 100 mW On state awaiting Tx and Rx commands Idle Power Consumption Activity Power Mode

slide-51
SLIDE 51

March 2003

Joy Kelly, Time Domain Corporation Slide 51

doc.: IEEE 802.15-03/143

Submission

Regulatory impact

  • Banded radio flexibility can

accommodate regulatory requirements

  • f virtually any geopolitical region
  • Radio will conform to all regions

adopting US UWB regulations.

  • Radio will meet projected regulatory

requirements of Europe and Japan.

slide-52
SLIDE 52

March 2003

Joy Kelly, Time Domain Corporation Slide 52

doc.: IEEE 802.15-03/143

Submission

Conclusions

  • Time Domain’s Proposal

– Is FCC compliant – Achieves data rate and range requirements – Enables low cost, low power solution – Exceeds channelization (6 channels) – Supplies robustness mechanisms for harsh environments – Provides flexibility in spectrum use – Defines growth path via number of bands – Requires minimal MAC supplements Our multi-band approach enables a world-wide UWB WPAN standard that is scalable, flexible, and durable. Our multi-band approach enables a world-wide UWB WPAN standard that is scalable, flexible, and durable.

slide-53
SLIDE 53

March 2003

Joy Kelly, Time Domain Corporation Slide 53

doc.: IEEE 802.15-03/143

Submission

802.15.3a Early Merge Work

Time Domain will be cooperating with:

Objectives:

  • “Best” technical solution
  • ONE solution
  • Excellent business terms
  • Fast time to market

We encourage participation by any party who can help us reach these goals.

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