TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
SMART ANTENNA
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[1]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
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.
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[2]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
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
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[3]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
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
.
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[4]
2004
PRESENTATION
TRAINING
SUMMER
PRESENTATION
SEMINAR
TECHNICAL
SMART ANTENNA
Switched Beam Antennas
Figure- Switched Beam System Coverage
Patterns (Sectors)
BANDANA ROUT
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[5]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
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.
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[6]
2004
PRESENTATION
TRAINING
SUMMER
PRESENTATION
SEMINAR
TECHNICAL
SMART ANTENNA
Adaptive Array Antennas
Figure- Adaptive Array Coverage
BANDANA ROUT
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[7]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
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.
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[8]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
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).
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[9]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
Benefits of Switched Beam and
Adaptive Array systems
•Integration.
•Range or coverage.
•Interference suppression.
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[10]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
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.
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[11]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
Advantages of smart antenna
Smart antennas can help systems meet
requirements in the following manner:
these
• 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.
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[12]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
Uses of smart antenna
• Phased arrays are mainly being studied for point-topoint 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.
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[13]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
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.
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[14]
TECHNICAL SEMINAR PRESENTATION
SMART ANTENNA
Thank You!!!
Edited by: Priyabrata Nayak, Lecturer, Dept. of CSE
[15]