presented by: Mark Lombardi Agilent USB/WiMedia Solution Manager

presented by:

Mark LombardiAgilent

USB/WiMedia Solution Manager

WiMedia UWB PHY Simulation and Test WiMedia UWB PHY Simulation and Test

Contributor Contributor Members Members WiMediaWiMedia

Members Members USB-IFUSB-IF

Outline

• UWB Commercial Application Drivers

• WiMedia based MB-OFDM UWB overview

• WiMedia based MB-OFDM R&D Challenges– Design and Simulation of WiMedia based UWB– Physical device measurements

• Industry Driven Testing– Compliance Based/Interoperability– Regulatory

• Conclusion / Q&A

Audience Question

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

Ultrawideband Technology

UWBUWB

Direct SpectrumDirect Spectrum MB-OFDMMB-OFDM

RADARRADAR CommunicationsCommunications WiMediaWiMedia

Certified Wireless USBCertified Wireless USB

(USB-IF)(USB-IF)BluetoothBluetooth

ExtensionsExtensions

IEEE IEEE

IEEE 1394IEEE 1394

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

Connecting the last “5 meters”

• PCs and Peripherals

• External Hard Drives, CD/DVD, burners

• Printers

• MP3

• Digital Cameras

Potential Certified Wireless USB products for 2006/2007

Short Range Wireless enabled by UWB

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

Outline

• UWB Commercial Application Drivers

• WiMedia based MB-OFDM UWB overview

• WiMedia based MB-OFDM R&D Challenges– Design and Simulation of WiMedia based UWB– Physical device measurements

• Industry Driven Testing– Compliance Based/Interoperability– Regulatory

• Conclusion / Q&A

Spectrum Occupancy

WLAN

WiMedia PHY: Frequency Domain

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

128 subcarriers,4.125 MHzspacing

12 BPSK PilotsQPSK, DCM

5 Guards5 Guards

528 MHz/Band

Description Parameter ValueSampling Frequency Fs 528 MHzTotal number of subcarriers (FFT size)

NFFT 128

Number of data subcarriers 100Number of pilot subcarriers 12Number of guard subcarriers 10Number of null subcarriers 6Subcarrier Frequency Spacing 4.125 MHz

Logical Frequency Subcarriers -61 . . . . . . . . . . . . . . . . . . . .+610

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.

12 BPSK PilotsQPSK, DCM

5 Guards5 Guards

528 MHz/Band. . . . . . . . . .+610

WiMedia PHY, Time Domain

time

OFDM Symbol(IFFT Output)

ZPS(Zero-padded Suffix)

Symbol (312.5ns)

Description Parameter ValueSymbol Rate FSYM 3.2 MHzSymbol Interval TSYM 312.5 nsIFFT and FFT period TFFT 242.42

nsZero-padded suffix duration in time TZPS 70.08 ns

Sampling Frequency Fs 528MHzTotal number of subcarriers (FFT size)

NFFT 128

Number of samples in zero-padded suffix

NZPS 37

Total number of samples per symbol NSYM 165

Packet/FrameSynchronization Sequence Frame Payload

30 sym for standard (24 + 6)18 sym for burst (12 + 6)

12 symPSDU

Channel EstimationSequence

Freq.528 MHz

Packet 　

PLCP Preamble PLCP Header

time

Amp.

6*(0, 1, …,37) sym

WiMedia PHY: Time and Freq.

timeFreq.

3168 MHz

3696 MHz

4224 MHz

4752 MHz

…..Band #1

Band #2

Band #3

Symbol

BandGroup

1

TFC: Time Frequency Code

TFC Number

Band ID (Band number) for TFC

1 1 2 3 1 2 32 1 3 2 1 3 23 1 1 2 2 3 34 1 1 3 3 2 25 1 1 1 1 1 16 2 2 2 2 2 27 3 3 3 3 3 3

TFI: Time-Frequency Interleaving

FFI: Fixed Frequency Interleaving

Data A

Data B

Data C

Data D

Data E

Data F

Data G

…..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.

copy

Frequency-Domain Spreading-Transmit same information

Outline

• UWB Commercial Application Drivers

• WiMedia based MB-OFDM UWB overview

• WiMedia based MB-OFDM R&D Challenges– Design and Simulation of WiMedia based UWB– Physical device measurements

• Industry Driven Testing– Compliance/Interoperability– Regulatory

• Conclusion / Q&A

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

UWB Engineering Challenges IIRECEIVER• Interference Testing• Generating UWB Test Signals

• Measuring Rx PER / BER, with known distortions (impairments)• Interoperability testing

Merging Simulation and Test

ConceptDesign Design

Verification Prototype(Hardware Verification) Pilot

ProductionProduction

R&D Space

Manufacturing Space

Components Verification

Design

Instruments

EDA Tools

Compliance Space

ADS for Wireless Communication System Design

Transistor-Level

Hardware-Level

System-Level

Circuit-Level

Fully coded signal source DUT Receiver Measurement`

Wireless Standards SpecificationWireless Libraries

ADC quantization error

ADCADC Model

Simulation and Vector Signal Analysis

802.11a interferer

WiMediaSignal

802.11aSignal

Filter

Test Both Analog and BB Sections

• ADS or N7619A

• PSG (opt 015)

• N6030A AWG

Analog I/Q

Baseband (BB) and RF Signals

To Baseband

section

To RF section

Transmitter performance testing

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

Transmitter performance testing

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

Outline

• UWB Commercial Application Drivers

• WiMedia based MB-OFDM UWB overview

• WiMedia based MB-OFDM R&D Challenges– Design and Simulation of WiMedia based UWB– Physical device measurements

• Industry Driven Testing– Compliance/Interoperability– Regulatory

• Conclusion / Q&A

Intel Product Development Kit

WUSB WUSB HostHost

MAC PHY

• Available through the USB-IF

• Alternate control provided by PHY vendor

• 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

RF tests for WiMedia based radios

89600 VSA SW Radio Measurements

Measurement Summary

PSD Mask and ACPR

UWB Bands and WW Regulations

Band #1

DAAAfter 2010

Band #2

Band #3

Band #4

Band #5

Band #6

Band #7

Band #8

Band #9

Band #10

Band #11

Band #12

Band #13

Band #14

Band Group #1

Band Group #2

Band Group #3

Band Group #4

Band Group #5

3432MHz

3960MHz

4488MHz

3168 MHz

5016MHz

5544MHz

6072MHz

6600MHz

7128MHz

7656MHz

8184MHz

8712MHz

9240MHz

9768MHz

10296MHz

10560 MHz

EU

Asia

Unusable bandsUsable bands (Detect And Avoid) Usable bands

US

DAAAfter 2008

Japan

To be determined

-70dBm -70dBm-70dBm -70dBm-70dBm -70dBm-70dBmDAA??

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.

Agilent E8267DPSG Series

Vector Signal Generator

Analogue IQ

UWB Signal Creation

UWB Signal Verification,EVM measurement

Advanced Design System

Signal Generation

DemodulationBase Band Modulation

Agilent N6030AArbitrary Waveform

Generator

Agilent 89600VSA Software

Agilent E4440APSA Series 26.5GHzSpectrum Analyzer

Agilent Infiniium DSO 81204B12GHz,40GSaOscilloscope

Spectrum Testing

WiMedia based DUT

Simulation

Agilent N7619ASignal Studio for Multiband OFDM

UWB

Regulatory Test, FCC

BER/PER

Agilent Transmitter

“Golden Radio”

Agilent Receiver

WiMedia RF Measurement Solution

• Tools are available today to help with the design and integration of WiMedia based radio technology.

• Simulation aids the development of WiMedia based radio’s 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”.

Summary

www.agilent.com/find/uwb

• 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.usb.org/wusb/home

www.wimedia.org

Further Information