Low cost smart antennas for mesh networks: Difference between revisions

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== Team members ==
== Team members ==
Albert Lysko
* Albert Lysko
* To be allocated


Notes:
Notes:
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== Replacement for Omnidirectional Antenna ==
== Replacement for Omnidirectional Antenna ==
This antenna would have a low to intermediate gain due to practical difficulties to obtain both 360 degrees beam steering and high gain at the same time.  
The purpose of such antenna is to replace a traditional omnidirectional antenna and provide an intermediate solution to collision avoidance, and hidden and exposed terminal problems.


A good candidate for such an antenna in terms of cost is a parasitic array antenna (e.g. ESPAR).
This antenna would have a low to intermediate gain due to practical difficulties to obtain both 360 degrees beam steering and high gain at the same time.


'''Directions:'''
== Antenna Capable of Long-distance Links ==
1. Basic control and monitoring tools.
This antenna is to replace the high-gain traditional reflector antennas. The smartness of this antenna is in:
2. Control of radiation pattern via a separate interface by-passing MAC TCP etc.
3. More intellegent integration with MAC layer.
a. Its ability to identify direction-of-arrieval of the signal (for the set-up purposes),
4. Ability to do direction-of-arrieval (DOA) finding.
b. Keeping track of a remote node in real time to compensate for wind/temperature,
5. Further integration with MAC layer.
c. Adapting the beamwidth and transmitter power level (in addition to b.)
 
The topics 3 and 5 are the most complex.

Latest revision as of 15:58, 6 August 2008

Team members

  • Albert Lysko
  • To be allocated

Notes: Collaboration with Hungarian researchers (USZ) is on the way.

Abstract

Smart antenna is an antenna that is capable of adapting its properties to satisfy particular goal(s). The goals may for example include radiation pattern shaping (beamforming/beamswitching). The beamforming provides spatial (directional) selectivity and permits to enhance gain in a desired direction and also to lower the influence of a source of interference.

The capacity of a mesh network can be improved substantially if smart antennas are employed. The smartness of such antennas comes from the intelligent algorithms controlling antenna. The intelligence may include using the ability to steer the beam in order to enhance the node discovery and node self-healing. Beamforming and beam-switching antennas which are integrated with routing protocols is a new areas of research.

Replacement for Omnidirectional Antenna

The purpose of such antenna is to replace a traditional omnidirectional antenna and provide an intermediate solution to collision avoidance, and hidden and exposed terminal problems.

This antenna would have a low to intermediate gain due to practical difficulties to obtain both 360 degrees beam steering and high gain at the same time.

Antenna Capable of Long-distance Links

This antenna is to replace the high-gain traditional reflector antennas. The smartness of this antenna is in:

a. Its ability to identify direction-of-arrieval of the signal (for the set-up purposes), b. Keeping track of a remote node in real time to compensate for wind/temperature, c. Adapting the beamwidth and transmitter power level (in addition to b.)