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SMART ANTENNA under the guidance of Mr. G.V.Kiran Kumar. What is Smart Antenna?. A smart antenna system combines multiple antenna elements with a signal-processing capability to optimize its radiation and/or reception pattern automatically in response to the signal environment.

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SMART ANTENNA under the guidance of Mr. G.V.Kiran Kumar

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Smart antenna under the guidance of mr g v kiran kumar

SMART ANTENNA

under the guidance of

Mr. G.V.Kiran Kumar

EC200163377


Smart antenna under the guidance of mr g v kiran kumar

What is Smart Antenna?

  • A smart antenna system combines multiple antenna elements with a signal-processing capability to optimize its radiation and/or reception pattern automatically in response to the signal environment.

  • In truth, antennas are not smart—antenna systems are smart. Generally co-located with a base station, a smart antenna system combines an antenna array with a digital signal-processing capability to transmit and receive in an adaptive, spatially sensitive manner.

EC200163377


Smart antenna under the guidance of mr g v kiran kumar

Types of Smart Antenna systems

  • Smart antenna systems are customarily categorized, as either switched beam or adaptive array systems.

  • · Switched beam—a finite number of fixed, predefined patterns or combining strategies (sectors)

  • ·Adaptive array—an infinite number of patterns (scenario-based) that are adjusted in real time

EC200163377


Smart antenna under the guidance of mr g v kiran kumar

Switched Beam Antennas

  • It form multiple fixed beams with heightened sensitivity in particular directions.

  • These antenna systems detect signal strength, choose from one of several predetermined, fixed beams, and switch from one beam to another as the mobile moves throughout the sector.

  • switched beam systems combine the outputs of multiple antennas in such a way as to form finely sectorized (directional) beams with more selectivity .

EC200163377


Smart antenna under the guidance of mr g v kiran kumar

Switched Beam Antennas

SUMMER TRAINING PRESENTATION 2004

Figure- Switched Beam System Coverage Patterns (Sectors)

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BANDANA ROUT


Smart antenna under the guidance of mr g v kiran kumar

Adaptive Array Antennas

  • Adaptive antenna technology represents the most advanced smart antenna approach by using a variety of new signal-processing algorithms.

  • It provides optimal gain while simultaneously identifying, tracking, and minimizing interfering signals.

EC200163377


Smart antenna under the guidance of mr g v kiran kumar

Adaptive Array Antennas

SUMMER TRAINING PRESENTATION 2004

Figure- Adaptive Array Coverage

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BANDANA ROUT


Smart antenna under the guidance of mr g v kiran kumar

The goals of a smart antenna system

  • The purpose of a smart antenna system is to augment the signal quality of the radio-based system through more focused transmission of radio signals while enhancing capacity through increased frequency reuse.

  • The features of a smart antenna system are

  • - signal gain.

  • - inference rejection.

  • -power efficiency.

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Smart antenna under the guidance of mr g v kiran kumar

Architecture of smart antenna system

  • Switched beam and adaptive array systems enable a base station to customize the beams they generate for each remote user effectively by means of internal feedback control.

  • Listening to the cell.(uplink processing).

  • Speaking to the users(downlink processing).

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Smart antenna under the guidance of mr g v kiran kumar

Benefits of Switched Beam and Adaptive Array systems

  • Integration.

  • Range or coverage.

  • Interference suppression.

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Smart antenna under the guidance of mr g v kiran kumar

Who can use smart antennas ?

  • Smart antenna technology can significantly improve wireless system performance and economics for a range of potential users.

  • It enables operators of PCS, cellular, and wireless local loop (WLL) networks to realize significant increases in signal quality, capacity, and coverage.

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Smart antenna under the guidance of mr g v kiran kumar

Advantages of smart antenna

  • Smart antennas can help systems meet these requirements in the following manner:

  • First, both phased and adaptive arrays provide increased power by providing higher gain for the desired signal.

  • In terms of interference suppression, phased arrays reduce the probability of interference with the narrower beam, and adaptive arrays adjust the beam pattern to suppress interference.

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Smart antenna under the guidance of mr g v kiran kumar

Uses of smart antenna

  • Phased arrays are mainly being studied for point-to-point wireless systems, e.g., for wireless local loops.

  • Adaptive arrays are being considered on cellular terminals where local scattering causes wide angular spread.

  • In the TDMA system ANSI-136 adaptive antenna algorithms have been widely deployed.

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Smart antenna under the guidance of mr g v kiran kumar

Conclusion

  • The use of smart antennas is not purely a radio transmission issue.

  • It also influences network services such as handover and connection setup.

  • A smart antenna is a digital wireless communications antenna system that takes advantage of diversity effect at the source (transmitter), the destination (receiver), or both.

EC200163377


Smart antenna under the guidance of mr g v kiran kumar

Thank You!!!

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