presented by: Mark Lombardi Agilent USB/WiMedia Solution Manager WiMedia UWB PHY Simulation and Test Contributor Contributor Members Members WiMedia WiMedia Members Members USB-IF USB-IF
Jan 12, 2016
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