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SMART ANTENNA SYSTEMS

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SMART ANTENNA SYSTEMS. SMART ANTENNA SYSTEMS Increasing use in Mobile Wireless Communications du e t o demand for Higher Capacity Higher Coverage Higher bit rate Improved link quality Mobility. Smart Antenna A ntenna with a digital signal processing

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slide2

SMART ANTENNA SYSTEMS

  • Increasing use in Mobile WirelessCommunicationsdue todemand for
        • Higher Capacity
        • Higher Coverage
        • Higher bit rate
        • Improved link quality
        • Mobility
slide3

Smart Antenna

  • Antenna with a digital signalprocessing
  • capability to transmit and receive in an
  • adaptive and
  • spatiallysensitive
  • manner.
slide4

Aim

  • to maximize the antenna gain in the desired direction
  • to minimize the gain in directions of interferers
slide5

An Example:

Smart Antenna Array = “a person’s head”

slide6

TYPES

  • (According to level of intelligence)
  • Switched Beam Antennas
  • Phased Arrays
  • Adaptive Arrays
slide7

Top View

Top View

Antenna Array

Antenna

SMART ANTENNAS (1)

Omnidirectional

Sectorized

slide8

Active Beam

Desired User

Antenna Array

Interfering User

Antenna Array

SMART ANTENNAS (2)

Switched Beam System

Adaptive Array

slide10

TYPES

SDMA (Space Division Multiple Access)

slide14

USAGE

  • cellular and wireless networks
  • radar
  • electronic warfare (EWF) as a countermeasure to electronic jamming
  • satellite systems
slide15

SOME BENEFITS

  • Capacity increase
  • Range increase
  • Multipath rejection
  • Reduced expense
  • Higher reliability (security)
slide16

SOME DRAWBACKS

  • Transceiver complexity
  • Resource management
  • Physical size
slide17

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

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