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Which among the following technologies is employed to predict performance metrics?

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Which among the following technologies is employed to predict performance metrics?

(a) Network based ontology

(b) Very large scale integrated circuits

(c) Radio propagation simulation tools

(d) Geographical information system

This question was posed to me in an interview.

Query is from Next Generation Wireless Network in chapter Next Generation Wireless Network of Cognitive Radio

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Right answer is (c) Radio propagation simulation tools

The best explanation: Radio propagation simulation tools are used to predict important parameters such as path loss, signal to noise ratio, and geographical environment information. Location specific radio propagation techniques with 3 D terrain maps offer accurate predictions that can provide better system planning and management.

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