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CBSE Class 12-science Answered

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Asked by | 03 Mar, 2008, 04:25: PM
Expert Answer

Line of sight communication.:

High gain antennas are needed to compensate for the

high free space damping. Gain per antenna around 30 dB.

(could be acomplished with antenna arrays).

The problem with LOS communication : --

 

:Link is broken if somebody steps into the beam.

 

Solution: use indirect non-line of sight paths as back up links.

•This involves the reflections off the walls (billard)

•One would also need smart antennas

 

Answered by | 16 May, 2008, 04:55: PM
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