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Which among the following phenomenon require site specific propagation prediction?

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Which among the following phenomenon require site specific propagation prediction?

(a) Location awareness

(b) Geographical awareness

(c) RF environment

(d) Position awareness

I have been asked this question in homework.

My query is from Next Generation Wireless Network in portion Next Generation Wireless Network of Cognitive Radio

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Correct option is (b) Geographical awareness

To elaborate: Geographical awareness provides information on terrain and geographical information pertaining to radio propagation and channel properties. Terrain recognition, site specific propagation prediction, and exploitation of geographical information database are the techniques applied to gain geographical awareness.

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