beware of cobra ! co mputer b ased r adio and a ntennas
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V o d a f o n e C h a i rMobile Communications Systems
Beware of COBRA !Beware of COBRA !
COmputer Based Radio and Antennas
TechnischeUniversitätDresden
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Software Defined Radio
Smart Antenna Concepts
Implementation
The Vodafone Chair
Software Radio
Smart Antennas
Implementation
Vodafone Chair
Demonstrating future concepts of Demonstrating future concepts of wireless communications !wireless communications !
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
High Diversity of Communications Systems !High Diversity of Communications Systems !
Mobility
indoor
pedestrian
high
DA
B
DV
B -
T
UMTS
G
SM
GPRS EDGE
DECT
10 100 1000 10000 100000 kBit/s
Blue ToothWLAN
Data rate
Software Radio
• Motivation • Idea• Demonstrator Concept• Hardware
Smart Antennas
Implementation
Vodafone Chair
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Software Defined Radio - IdeaSoftware Defined Radio - Idea
Software Radio
• Motivation • Idea• Demonstrator Concept• Hardware
Smart Antennas
Implementation
Vodafone Chair
Do as much signal processing as you can afford in software and you can
use the same hardware for different communications systems
simple download system updates and new features
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Demonstrator Concept Demonstrator Concept
AntennasAntennas
SignalSignalProcessingProcessing
RF-ComponentsRF-Components
TransmitterTransmitter
ReceiverReceiver
Software Radio
• Motivation • Idea• Demonstrator Concept• Hardware
Smart Antennas
Implementation
Vodafone Chair
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Smart Antennas - State of the ArtSmart Antennas - State of the Art
Sectorized Antennas
Beamforming at BS
Space-Space-Time Time
CodingCoding
TX-Diversity at BS
GSM,UMTS GSM,UMTS WLAN, UMTS
Software Radio
Smart Antennas• State of Art• Theory• MIMO Systems• Demonstrator Features
Implementation
Vodafone Chair
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Theory of Multi Antenna Systems (MIMOTheory of Multi Antenna Systems (MIMO))
Signal to Noise Ratio [dB]
Th
rou
gh
pu
t [
bit
/s/H
z]
0 5 10 15 20 25 300
5
10
15
20
25
30
6 times more bits over a radio 6 times more bits over a radio channel @ SNR of 20 dB !channel @ SNR of 20 dB !
Software Radio
Smart Antennas• State of Art• Theory• MIMO Systems• Demonstrator Features
Implementation
Vodafone Chair
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
MIMO-SystemsMIMO-Systems
Space-Time-CodingSpace-Time-CodingOne data stream over multiple TX-antennas
(robustness)
V-BLASTV-BLASTOne data stream for
each antenna(high-data rate)
Tra
nsm
itter
Receiv
er
D-BLAST,D-BLAST,Multi-Stratum-Space-Time-CodesMulti-Stratum-Space-Time-Codes
Multiple Data Streams over all antennas
(high data rate & robustness)
Software Radio
Smart Antennas• State of Art• Theory• MIMO Systems• Demonstrator Features
Implementation
Vodafone Chair
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Demonstrator FeaturesDemonstrator Features
Direct Sequence Spread Spectrum System Compliant with UMTS-Uplink Physical Layer implemented Includes true synchronizationUsage of multiple antennas (currently 2 x 2)
Achievements:Space-Time-Channel measurementsPerformance Evaluation Space-Time-AlgorithmsGeneral Software Radio Framework including GUI’s
Software Radio
Smart Antennas• State of Art• Theory• MIMO Systems• Demonstrator Features
Implementation
Vodafone Chair
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Scalable Transmitter SetupScalable Transmitter Setup
Sampling rate: 7.68 MHzFrequency Output: BasebandBandwidth: 4.68 MHz
RRC Filter
RRC Filter
Lowpass
Lowpass IQ-Mod
Host PCHost PC
ICS 660ICS 660
To RF and antennas
D/A Converter
PPC 7400PPC 7400UMTS
Spreading
PPC 7400PPC 7400
Data Source
GUI Software Radio
Smart Antennas
Implementation• Transmitter• Receiver
Vodafone Chair
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
ScalableScalable Receiver Setup Receiver Setup
From RF and
antennas
PPC 7400PPC 7400ICS 660ICS 660
RRC Filter
PPC 7400PPC 7400
Lowpass
ICS 660ICS 660
Demod A/D
PPC 7400PPC 7400 Frequency Sync.
Time Sync.
3-Finger-Space-TimeRAKE-Despreader
HostHost
Antenna Combiner
GUI
Sampling rate: 61.44 MHz (16x chiprate)Frequency Input: 15.36 MHz (IF = 4x chiprate)Bandwidth: 4.68 MHz
Software Radio
Smart Antennas
Implementation• Transmitter• Receiver
Vodafone Chair
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Project SponsorsProject Sponsors
COBRA demonstrator is part of the
Project Project
We would like to thank the following sponsors:
Software Radio
Smart Antennas
Implementation• Transmitter• Receiver• Sponsors
Vodafone Chair
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
The - Chair and its PartnersThe - Chair and its Partners
1 professor
3 secretaries
4 sen. scientists
2 system adm.
2 post-doc’s
20 Ph.D. students
15+ Ms students
SponsorsProject Partners
New since 2002
Software Radio
Smart Antennas
Implementation
Vodafone Chair• Sponsors• Research• IPP• Spin-Off‘s
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Research TopicsResearch Topics
EquipmentManufacturer
SemiconductorVendor
NetworkOperator
Physical Layer ResearchPhysical Layer Research
Software Radio
Smart Antennas
Implementation
Vodafone Chair• Sponsors• Research• IPP• Spin-Off‘s
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Industry Partner Program (IPP)Industry Partner Program (IPP)
This sponsoring program provides an opportunity for This sponsoring program provides an opportunity for companiescompanies
to support our research activities, to enhance teaching, to get in touch with our researchers and students.
As a thank you our IPP members will receiveAs a thank you our IPP members will receive
our quarterly newsletter "Dresden Mobile" copies of MS-diploma theses and student project reports copies of our publications and pre-prints an invitation to our annual IPP event.
The IPP membership therefore provides a platform to keep close contact with our chair.
IPP-Event on October 15, 2003IPP-Event on October 15, 2003
Software Radio
Smart Antennas
Implementation
Vodafone Chair• Sponsors• Research• IPP• Spin-Off‘s
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
• Founded 1999 • Based in San Jose and Dresden with
a RF design center in Maynard, Massachusetts
• Investors include Apax, Atlas, Lehman Brothers and Sony
• 60 Mb/s Wireless LAN Chip
(IEEE 802.11a/b) released in 2002• 2002 Philips Semiconductors has
acquired Systemonic
Software Radio
Smart Antennas
Implementation
Vodafone Chair• Sponsors• Research• IPP• Spin-Off‘s
TechnischeUniversitätDresden
V o d a f o n e C h a i rMobile Communications System
Network Planning
NetworkEngineering
Radioplan provides the technical essentials necessary to efficiently and effectively plan, build, and run
mobile radio networks
www.radioplan.de
(Founded in 2000)
MissionMission
Software Radio
Smart Antennas
Implementation
Vodafone Chair• Sponsors• Research• IPP• Spin-Off‘s
V o d a f o n e C h a i rMobile Communications Systems
• Software Radio–Motivation –Idea–Demonstrator Concept–Hardware
• Smart Antennas–State of Art–Theory–MIMO Systems–Demonstrator Features
• Implementation–Transmitter–Receiver–Project Sponsors
• Vodafone Chair–Sponsors–Research–IPP–Spin-Off‘s
TechnischeUniversitätDresden
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