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Which of the following do not undergo free space propagation?(a) Satellite communication system(b) Microwave line of sight radio links(c) Wireless line of sight radio links(d) Wired telephone systemsThis question was posed to me in class test.The query is from Free Space Propagation Model topic in section Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile

Answer»

Right CHOICE is (d) Wired TELEPHONE systems

Explanation: EM signals when traveling through wireless channels experience fading EFFECTS due to various effects. But in some cases the transmission is with no OBSTRUCTION and direct LINE of sight such as in satellite communication, microwave and wireless line of sight radio links.



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