presented by: Mark Lombardi Agilent USB/WiMedia Solution Manager

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presented byMark LombardiAgilent USB/WiMedia
Solution Manager
Contributor Members WiMedia
Members USB-IF
WiMedia UWB PHY Simulation and Test
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Outline

• UWB Commercial Application Drivers
• WiMedia based MB-OFDM UWB overview
• WiMedia based MB-OFDM RD Challenges
• Design and Simulation of WiMedia based UWB
• Physical device measurements
• Industry Driven Testing
• Compliance Based/Interoperability
• Regulatory
• Conclusion / QA

3
Audience Question

• Do you consider yourself a
• Digital Focused Designer
• RF Focused Designer
• Both RF and Digital Designer

4
Ultrawideband Technology
UWB
Direct Spectrum
MB-OFDM
IEEE
RADAR
Communications
WiMedia
Extensions
Certified Wireless USB (USB-IF)
Bluetooth
IEEE 1394
5
Connecting the last 5 meters

• USB 2.0 (High Speed USB)
• Most successful interface standard, about 3
  billion ports
• 480 MBit data rates
• Certified Wireless USB
• High speed USB replacement (480 MBits/s), Any
  other questions?
• Based on WiMedia Alliance OFDM UWB Technology
• Not just wireless USB (low speed mice and
  keyboards)
• Low power, short range, high data rates
• Bluetooth
• Headsets and automotive the current killer
  applications (1 MBit/s)
• Bluetooth 3.0 now planning to use WiMedia UWB for
  higher data rates

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Short Range Wireless enabled by UWB
Potential Certified Wireless USB products for
2006/2007

• PCs and Peripherals
• External Hard Drives, CD/DVD, burners
• Printers
• MP3
• Digital Cameras

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Companies Driving Adoption

• WiMedia Promoters
• Alereon, Inc., Hewlett-Packard Company, Intel
  Corporation, Kodak, Microsoft Corporation, Nokia
  Corporation, Philips, Samsung Electronics Co.,
  Ltd., Sony Corporation, Staccato
  Communications, STMicroelectronics, Texas
  Instruments, Inc., Wisair Ltd.
• WiMedia Formal Interoperability Test Participants
• PHY vendors Alereon, Inc., Realtek,
  Semiconductor, Staccato Communications, WiQuest
  Communications, Wisair and TZero Technologies
  Inc.
• Test Equipment manufactures Agilent
• USB Industry Forum (Certified Wireless USB)
• Leading Consumer Product Manufactures
• Listed WiMedia members, USB-IF members

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Outline

• UWB Commercial Application Drivers
• WiMedia based MB-OFDM UWB overview
• WiMedia based MB-OFDM RD Challenges
• Design and Simulation of WiMedia based UWB
• Physical device measurements
• Industry Driven Testing
• Compliance Based/Interoperability
• Regulatory
• Conclusion / QA

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Spectrum Occupancy
WLAN
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WiMedia PHY Frequency Domain

• FCC, Unlicensed 3100 MHz 10600 MHz, -41.3 dBm/1
  MHz
• 528 MHz x 14 Bands

5 Guards
5 Guards
QPSK, DCM
12 BPSK Pilots
128 subcarriers,4.125 MHzspacing
Logical Frequency Subcarriers -61 . . . . . . . .
. .
. . . . . . . . . .61
0
528 MHz/Band
Description Parameter Value
Sampling Frequency Fs 528 MHz
Total number of subcarriers (FFT size) NFFT 128

Number of data subcarriers 100
Number of pilot subcarriers 12
Number of guard subcarriers 10
Number of null subcarriers 6
Subcarrier Frequency Spacing 4.125 MHz
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The MB-OFDM UWB Physical Layer

• Subcarrier modulation
• The modulation type used on the subcarriers
  depends on data rate
• For the data-bearing subcarriers, QPSK or DCM
  (Dual-Carrier Modulation) is used.
• For the lower data rates, 200 Mb/s and lower,
  QPSK
• For the higher data rates, above 200 Mb/s to 480
  Mb/s, DCM is used.
• The 12 pilots are BPSK-modulated.

5 Guards
5 Guards
QPSK, DCM
12 BPSK Pilots
. . . . . . . . . .61
0
528 MHz/Band
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WiMedia PHY, Time Domain
Description Parameter Value
Symbol Rate FSYM 3.2 MHz
Symbol Interval TSYM 312.5 ns
IFFT and FFT period TFFT 242.42 ns
Zero-padded suffix duration in time TZPS 70.08 ns

Sampling Frequency Fs 528MHz
Total number of subcarriers (FFT size) NFFT 128
Number of samples in zero-padded suffix NZPS 37
Total number of samples per symbol NSYM 165
time
Freq.
528 MHz
Symbol (312.5ns)
OFDM Symbol (IFFT Output)
ZPS (Zero-padded Suffix)
Amp.
time
Packet
PSDU
PLCP Preamble
PLCP Header
12 sym
6(0, 1, ,37) sym
30 sym for standard (24 6) 18 sym for burst
(12 6)
Packet/FrameSynchronization Sequence

Frame Payload

Channel EstimationSequence
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WiMedia PHY Time and Freq.

• Frequency-Domain Spreading
• Transmit same information

time
Freq.
Symbol
3168 MHz
copy
Band 1
..
Band Group 1
3696 MHz
Band 2
4224 MHz
Band 3
4752 MHz

• Time-Domain Spreading
• Transmit same information over two symbols in TFI
  mode.
• Spreading factor is 2.
• Data A Data B but over the different sub-bands.

..
Data A
Data B
Data C
Data D
Data E
Data F
Data G
TFC Time Frequency Code
TFC Number Band ID (Band number) for TFC Band ID (Band number) for TFC Band ID (Band number) for TFC Band ID (Band number) for TFC Band ID (Band number) for TFC Band ID (Band number) for TFC
1 1 2 3 1 2 3
2 1 3 2 1 3 2
3 1 1 2 2 3 3
4 1 1 3 3 2 2
5 1 1 1 1 1 1
6 2 2 2 2 2 2
7 3 3 3 3 3 3
TFI Time-Frequency Interleaving
FFI Fixed Frequency Interleaving
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Outline

• UWB Commercial Application Drivers
• WiMedia based MB-OFDM UWB overview
• WiMedia based MB-OFDM RD Challenges
• Design and Simulation of WiMedia based UWB
• Physical device measurements
• Industry Driven Testing
• Compliance/Interoperability
• Regulatory
• Conclusion / QA

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UWB Engineering Challenges I

• ANTENNA, COMPONENT
• Wideband VSWR match and Impulse response
• Differential Signal Isolation, Common Mode
  Rejection

• TRANSMITTER
• Spectral Flatness, Emission Mask, Peak Power,
  ACP
• Transmit chain amplitude phase response
• Modulation Measurements (Error Vector
  Magnitude, Common Pilot Error)
• Phase noise

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UWB Engineering Challenges II

• RECEIVER
• Interference Testing
• Generating UWB Test Signals
• Measuring Rx PER / BER, with known distortions
  (impairments)
• Interoperability testing

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Merging Simulation and Test
Design
EDA Tools
RD Space
Concept
Compliance Space
Design
Design Verification
Manufacturing Space
Prototype (Hardware Verification)
Pilot Production
Production
Instruments
Components
Verification
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ADS for Wireless Communication System Design
Wireless Standards Specification

Wireless Libraries
Fully coded signal source
DUT
Receiver
Measurement
System-Level
Circuit-Level
Transistor-Level
Hardware-Level
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ADC quantization error
ADC Model
ADC
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Simulation and Vector Signal Analysis
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802.11a interferer
Filter
WiMedia Signal
802.11a Signal
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Test Both Analog and BB Sections
Baseband (BB) and RF Signals

• ADS or N7619A

To Baseband section

• N6030A AWG

Analog I/Q
To RF section

• PSG (opt 015)

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Transmitter performance testing
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Create Custom Waveforms

• Modify standard WiMedia based signals
• Data rate
• Payload data length
• Test individual receiver functions
• Bypass data scrambling, interleaving, and error
  correction
• Waveforms consisting of only packet preambles,
  channel estimation symbols

• N7619A

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Transmitter performance testing
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Capture of WiMedia based Signals

• Over 500 MHz required for FFI and 1.6 GHz
  required for TFI
• Mix down and capture with 2 GHz scope all Band
  groups
• Direct capture with 6 GHz scope for Band Group 1
• 12 GHz scope for all UWB Band Groups

Captured with Agilent DSO81204B, used with the
permission of Tzero Technologies
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Outline

• UWB Commercial Application Drivers
• WiMedia based MB-OFDM UWB overview
• WiMedia based MB-OFDM RD Challenges
• Design and Simulation of WiMedia based UWB
• Physical device measurements
• Industry Driven Testing
• Compliance/Interoperability
• Regulatory
• Conclusion / QA

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Intel Product Development Kit
WUSB Host
MAC
PHY

• Available through the USB-IF
• Alternate control provided by PHY vendor

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RF tests for WiMedia based radios

• Example PHY Compliance Tests
• Transmitter
• Transmit Center Frequency
• Transmit Power Control
• Power Spectral Density Mask (PSD)
• Adjacent Channel Power Ratio (ACPR)
• Error Vector Magnitude (EVM)
• Receiver
• Receiver Power Sensitivity
• Receiver Frequency Offset Sensitivity

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89600 VSA SW Radio Measurements
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Measurement Summary
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PSD Mask and ACPR
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UWB Bands and WW Regulations
Band Group
Band Group
Band Group
Band Group
Band Group

1

2

3

4

5
Band
Band
Band
Band
Band
Band
Band
Band
Band
Band
Band
Band
Band
Band

3

6
7
8

12

14

1

2

4

5



9

10

11

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US
DAA
EU
After
2010
DAA
Japan
-70dBm
-70dBm
-70dBm
-70dBm
-70dBm
-70dBm
-70dBm DAA??
After
2008
Asia
3432
3960
4488
5016
5544
6072
6600
7128
7656
8184
8712
9240
9768
10296
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
10560
3168
MHz
MHz
Usable bands (Detect And Avoid)
Usable bands
Unusable bands
To be determined
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Regulatory Emissions Tests

• E4440 26GHz Performance Spectrum Analyzer
• Most of the world wide regulatory organizations
  have or will have by early next year UWB limits.

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WiMedia RF Measurement Solution
Agilent Receiver
Agilent Transmitter Golden Radio
BER/PER
Advanced Design System
Simulation
Analogue IQ
WiMedia based DUT
Agilent Infiniium DSO 81204B12GHz,40GSaOscillos
cope
Agilent E8267D PSG Series Vector Signal Generator
Agilent 89600 VSA Software
Agilent N7619A Signal Studio for Multiband OFDM
UWB
Agilent N6030A Arbitrary Waveform Generator
UWB Signal Verification, EVM measurement
Signal Generation
Base Band Modulation
Demodulation
Spectrum Testing
UWB Signal Creation
Agilent E4440A PSA Series 26.5GHz Spectrum
Analyzer
Regulatory Test, FCC
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Summary

• Tools are available today to help with the design
  and integration of WiMedia based radio
  technology.
• Simulation aids the development of WiMedia based
  radios as well as optimization and integration
  with other radios and follow on applications.
• The up to 1.6 GHz of BW needed to capture and
  analyze WiMedia based MB-OFDM requires an
  Oscilloscope for capture.
• Powerful Signal Analysis SW, can aid radio
  optimization, analysis and verification of
  operation to WiMedia spec.
• Receiver performance can be benchmarked and
  optimized through the use of a golden radio.

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Further Information

• Ultrawideband Communication RF Measurements
  Application Note AN1488 5989-0506EN
• Cutler, Robert Effects of Physical Layer
  Impairments on OFDM Systems RF Design, May, 2002
  p. 36 www.rfdesign.com
• Agilent Application Note Agilent PSA Series
  Swept and FFT Analysis
• 89600 VSA Software Option BHB MB-OFDM Modulation
  Analysis Technical Overview and Demo Guide 
  5989-5452EN.
• Agilent Application Note 1380-1 RF Testing of
  Wireless LAN Products

www.agilent.com/find/uwb
www.wimedia.org
www.usb.org/wusb/home