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SMART ANTENNA SYSTEMS PowerPoint Presentation
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SMART ANTENNA SYSTEMS

SMART ANTENNA SYSTEMS

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SMART ANTENNA SYSTEMS

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  1. SMART ANTENNA SYSTEMS

  2. SMART ANTENNA SYSTEMS • Increasing use in Mobile WirelessCommunicationsdue todemand for • Higher Capacity • Higher Coverage • Higher bit rate • Improved link quality • Mobility

  3. Smart Antenna • Antenna with a digital signalprocessing • capability to transmit and receive in an • adaptive and • spatiallysensitive • manner.

  4. Aim • to maximize the antenna gain in the desired direction • to minimize the gain in directions of interferers

  5. An Example: Smart Antenna Array = “a person’s head”

  6. TYPES • (According to level of intelligence) • Switched Beam Antennas • Phased Arrays • Adaptive Arrays

  7. Top View Top View Antenna Array Antenna SMART ANTENNAS (1) Omnidirectional Sectorized

  8. Active Beam Desired User Antenna Array Interfering User Antenna Array SMART ANTENNAS (2) Switched Beam System Adaptive Array

  9. TYPES

  10. TYPES SDMA (Space Division Multiple Access)

  11. Downlink: Transmission Part

  12. Uplink: Reception Part

  13. Comparison of Switched Beam Antennas and Adaptive Arrays:

  14. USAGE • cellular and wireless networks • radar • electronic warfare (EWF) as a countermeasure to electronic jamming • satellite systems

  15. SOME BENEFITS • Capacity increase • Range increase • Multipath rejection • Reduced expense • Higher reliability (security)

  16. SOME DRAWBACKS • Transceiver complexity • Resource management • Physical size

  17. REFERENCES [1]“Smart Antenna Systems Tutorial”, The International Engineering Consortium, http://www.iec.org/online/tutorials/smart_ant/ [2]Lehne, P.H. and Pettersen M., “An Overview of Smart Antenna Technology for Mobile Communications Systems”, IEE Communications Surveys, Fourth Quarter 1999, vol. 2, no.4, http://www.comsoc.org/livepubs/surveys/public/4q99issue/pdf/Lehne.pdf [3]Schüttengruber, W., Molisch A.F. and Bonek E., “Smart Antennas for Mobile Communications Tutorial”, http://www.nt.tuwien.ac.at/mobile/research/smart_antennas_tutorial/index.en.html [4]“Smart Antennas Tutorial,” http://viterbi.ece.iisc.ernet.in/prem/SmartAnt/ [5]“Smart Antennas – A Non-technical Introduction”, SYMENA Software & Consulting GmbH, http://www.symena.com/Smart Antennas - A Nontechnical Introduction - SYMENA.pdf