Wa0003
Wa0003
Wa0003
SMART ANTENNAS
PRESENTED BY
DHARAMSOTH SANTHOSH
DHARAMSOTH SANTHOSH
B090652EC
B090652EC
Agenda
History
Introduction
What is smart antenna?
Functioning of smart antenna.
Types of smart antenna.
Digital beam forming
DOA estimation
Advantages
Application and conclusion
References
History
New opportunities were created for smart antenna in the year 1990 by
satellite broadcasting industries.
Introduction
Smart antenna is not smart, it is the digital signal processing, along with the
antennas, which makes the system smart.
What is Smart Antenna?
Co-channel interference:
Is a crosstalk from two different radio transmitter using same frequency.
CCI arises in the cellular mobile networks owing to this phenomenon of
frequency reuse.
Functioning of Smart Antennas
The functioning of smart antennas is still far from being well defined, and
many concepts are subject to thorough studies.
Technical aspects involve number of elements, fed with signals which are
adaptively processed by space or space-time filtering.
Functioning of SA cont…….
Antenna
Array
Block diagram of switched beam
antenna
Comparison b/w switched and
adaptive array antenna
Digital Beam Forming
The digital beam forming segment of the smart antenna comprises two
modules:
In the beam forming processor needs a lower rate of weight update which
usually ranges up to a few kHz.
DOA(Direction Of Arrival)
estimation
It is direction of arrival
The smart antenna estimates the direction of arrival of the signal, using
technique such as MUSIC(Multiple Signal Classification) estimation of signal
parameters via Matrix pencil method or one of their derivatives.
They involve finding a spatial spectrum of the antenna and calculating the
DOA from the peaks of this spectrum.
Advantages of smart antennas
Mobile communications
Cellular and wireless network.
Satellite communication.
Wireless sensor network.
Military.
Electronic warfare
Future scope
Smart antenna are the intelligent antenna systems that improve the
efficiency of wireless transmission.
[1] Dau-Chyrh Chang and Cheng-Nan Hu, “Smart Antennas for Advanced
Communication Systems”-vol.100,no.7, July 2012.
[2] Daniel J Bern, Pawel Kabacik,-”Smart Antennas for Mobile Communication
Systems”.
[3]Nihad A. A. Elhag, Islam M Osman, Alaa A Yassin, Tsneem B Ahmed,”Angle
of Arrival Estimation in Smart Antenna Using MUSIC method for Wideband
Wireless Communication” IEEE 2013.
[4]T. Nageswara Rao, V. Srinivasa Rao, “Evaluation of MUSIC algorithm for a
Smart Antenna system for Mobile Communications”.
Thank you