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  • 1. Beware of COBRA ! CO mputer B ased R adio and A ntennas Technische Universität Dresden
  • 2.
    • Software Defined Radio
    • Smart Antenna Concepts
    • Implementation
    • The Vodafone Chair
    • Software Radio
    • Smart Antennas
    • Implementation
    • Vodafone Chair
    Demonstrating future concepts of wireless communications ! 
  • 3. High Diversity of Communications Systems ! Mobility indoor pedestrian high
    • Software Radio
      • Motivation
      • Idea
      • Demonstrator
      • Concept
      • Hardware
    • Smart Antennas
    • Implementation
    • Vodafone Chair
     DAB DVB -T UMTS GSM GPRS EDGE DECT 10 100 1000 10000 100000 kBit/s Blue Tooth WLAN Data rate
  • 4. Software 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
  • 5. Demonstrator Concept Antennas Signal Processing RF-Components Transmitter Receiver
    • Software Radio
      • Motivation
      • Idea
      • Demonstrator
      • Concept
      • Hardware
    • Smart Antennas
    • Implementation
    • Vodafone Chair
  • 6. Demonstrator Hardware - Signal Processing
    • Software Radio
      • Motivation
      • Idea
      • Demonstrator
      • Concept
      • Hardware
    • Smart Antennas
    • Implementation
    • Vodafone Chair
    • Host System:
    • Single Board Computer (Pentium 800 MHz, WinNT)
    • Sampling :
    • ICS660 D/A board 14 bit, sampling@ 7.68 MHz
    • ICS652 A/D boards with DDC (GC1012A), 12 bit,
    • sampling@ 61.44 MHz
    • Signal Processing (VantageRT 7400):
    • G4 (MPC7400) based compute environments which are connected by a Raceway++ network including crossbars on the PCILK++
    • Parameters:
      • Intermediate Frequency 15.36 MHz
    • Bandwidth 5 MHz
  • 7. Demonstrator Hardware - RF-Frontend Frequency Range: 5.21 GHz, 5.23 GHz (HiperLAN/2) 5.85 GHz, 5.87 GHz (ISM) Stability: ∆ f / f= ± 0.5 ppm Transmitter Bandwidth: 5 MHz Gain Control: 0 … 31 dB in steps of 1 dB Output Power TX: 21 dBm Output Noise Density: -90 dBm/Hz Receiver Output Frequency (IF): 15.36 MHz Bandwidth: 5 MHz Gain Control: 0 … 63 dB in steps of 1 dB Input Level Range: -90 … -30 dBm Noise Figure: < 4 dB Image Suppressing: > 50 dB
    • Software Radio
      • Motivation
      • Idea
      • Demonstrator
      • Concept
      • Hardware
    • Smart Antennas
    • Implementation
    • Vodafone Chair
  • 8. 8 antennas for 5.2 GHz (omni and polarized) 8 antennas for 5.8 GHz (omni and polarized) 2 flexible stands Flexible configurations: Up to 4X4 MIMO system Polarization diversity HiperLAN/2 and ISM-band Different antenna distances
    • Software Radio
      • Motivation
      • Idea
      • Demonstrator
      • Concept
      • Hardware
    • Smart Antennas
    • Implementation
    • Vodafone Chair
    Demonstrator Hardware - Antenna System 
  • 9. Smart Antennas - State of the Art Sectorized Antennas Beamforming at BS Space-Time Coding 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
  • 10. Theory of Multi Antenna Systems (MIMO )
    • Software Radio
    • Smart Antennas
      • State of Art
      • Theory
      • MIMO
      • Systems
      • Demonstrator
      • Features
    • Implementation
    • Vodafone Chair
     Signal to Noise Ratio [dB] Throughput [bit/s/Hz] 0 5 10 15 20 25 30 0 5 10 15 20 25 30 6 times more bits over a radio channel @ SNR of 20 dB !
  • 11. MIMO-Systems Space-Time-Coding One data stream over multiple TX-antennas (robustness) V-BLAST One data stream for each antenna (high-data rate) Transmitter Receiver
    • Software Radio
    • Smart Antennas
      • State of Art
      • Theory
      • MIMO
      • Systems
      • Demonstrator
      • Features
    • Implementation
    • Vodafone Chair
     D-BLAST, Multi-Stratum-Space-Time-Codes Multiple Data Streams over all antennas (high data rate & robustness)
  • 12. Demonstrator Features
    • Direct Sequence Spread Spectrum System
    • Compliant with UMTS-Uplink
    • Physical Layer implemented
    • Includes true synchronization
    • Usage of multiple antennas (currently 2 x 2)
    • Achievements:
    • Space-Time-Channel measurements
    • Performance Evaluation Space-Time-Algorithms
    • General Software Radio Framework including GUI’s
    • Software Radio
    • Smart Antennas
      • State of Art
      • Theory
      • MIMO
      • Systems
      • Demonstrator
      • Features
    • Implementation
    • Vodafone Chair
  • 13. PHY-Implementation - Transmitter Channel 2 (DCH 3&4) Channel 3 (DCH 5&6) Channel 1 (DCH 1&2) Pilot (CCH ) Channel 1 (DCH 1&2)
    • Software Radio
    • Smart Antennas
    • Implementation
    • Transmitter
    • Receiver
    • Vodafone Chair
     Spreading Code N Gain N Space-Time Code SF N to antenna 1 to antenna 2
  • 14. Scalable Transmitter Setup Sampling rate: 7.68 MHz Frequency Output: Baseband Bandwidth: 4.68 MHz RRC Filter RRC Filter Lowpass Lowpass Host PC ICS 660 To RF and antennas D/A Converter PPC 7400 UMTS Spreading PPC 7400 Data Source GUI
    • Software Radio
    • Smart Antennas
    • Implementation
    • Transmitter
    • Receiver
    • Vodafone Chair
     IQ-Mod
  • 15. Scalable Receiver Setup From RF and antennas PPC 7400 ICS 660 RRC Filter PPC 7400 Lowpass ICS 660 Demod A/D PPC 7400 Frequency Sync. Time Sync. 3-Finger-Space-Time RAKE-Despreader Host 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
  • 16. RAKE-Functionality Early Despread Pilot Late Despread Pilot On Time Despread Pilot DOT PLL ∆ On Time Despread Data RAKE-Finger 1 Data symbols estimates from RRC-Filter
    • Software Radio
    • Smart Antennas
    • Implementation
    • Transmitter
    • Receiver
    • Vodafone Chair
     Space-Time Decoding ST- Decoding ST- Decoding Σ Maximum Ratio Combining Channel Coefficients Data Symbols RAKE-Finger 2 RAKE-Finger 3
  • 17. Project Sponsors
    • COBRA demonstrator is part of the
    • Project
    We would like to thank the following sponsors:
    • Software Radio
    • Smart Antennas
    • Implementation
    • Transmitter
    • Receiver
    • Sponsors
    • Vodafone Chair
     
  • 18. The - Chair and its Partners
    • 1 professor
    • 3 secretaries
    • 4 sen. scientists
    • system adm.
    • 2 post-doc’s
    • 20 Ph.D. students
    • 15+ Ms students
    Sponsors Project Partners New since 2002
    • Software Radio
    • Smart Antennas
    • Implementation
    • Vodafone Chair
    • Sponsors
    • Research
    • IPP
    • Spin-Off‘s
  • 19. Research Topics Equipment Manufacturer Semiconductor Vendor Network Operator Physical Layer Research DSP Hardware&Tools Radio Modems Radio Networks
    • Software Radio
    • Smart Antennas
    • Implementation
    • Vodafone Chair
    • Sponsors
    • Research
    • IPP
    • Spin-Off‘s
  • 20. Industry Partner Program (IPP)
    • This sponsoring program provides an opportunity for companies
      • 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 receive
      • our quarterly newsletter &quot;Dresden Mobile&quot;
      • 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, 2003
    • Software Radio
    • Smart Antennas
    • Implementation
    • Vodafone Chair
    • Sponsors
    • Research
    • IPP
    • Spin-Off‘s
  • 21.
    • 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
  • 22. Mission Network Planning Network Engineering Radioplan provides the technical essentials necessary to efficiently and effectively plan, build, and run mobile radio networks www.radioplan.de (Founded in 2000)
    • Software Radio
    • Smart Antennas
    • Implementation
    • Vodafone Chair
    • Sponsors
    • Research
    • IPP
    • Spin-Off‘s
  • 23.
    • 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
    Technische Universität Dresden