SMART ANTENNA
Download
1 / 15

SMART ANTENNA under the guidance of Mr. G.V.Kiran Kumar - PowerPoint PPT Presentation


  • 158 Views
  • Uploaded on

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.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' SMART ANTENNA under the guidance of Mr. G.V.Kiran Kumar ' - uriah-orr


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

SMART ANTENNA

under the guidance of

Mr. G.V.Kiran Kumar

EC200163377


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


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


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


Switched Beam Antennas

SUMMER TRAINING PRESENTATION 2004

Figure- Switched Beam System Coverage Patterns (Sectors)

EC200163377

[5]

BANDANA ROUT


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


Adaptive Array Antennas

SUMMER TRAINING PRESENTATION 2004

Figure- Adaptive Array Coverage

EC200163377

[7]

BANDANA ROUT


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.

EC200163377


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).

EC200163377


Benefits of Switched Beam and Adaptive Array systems

  • Integration.

  • Range or coverage.

  • Interference suppression.

EC200163377


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.

EC200163377


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.

EC200163377


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.

EC200163377


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


Thank You!!!

EC200163377


ad