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A mobile base station (BS) in an urban environment has a power measurement of 35 µW at 180 m. Assuming the propagation follows the inverse 4th power law (see Section 3.2.2), what is a reasonable power value in W, to assume at a distance of 540 m from the BS?

 Mar 3, 2020
 #1
avatar+29249 
+4

Power = k/distance4 where k is a constant.

 

Plug in the known values

35 = k/1804  so k = 35*1804

 

At 540m we have power = k/5404 = 35*1804/5404 = 35*(180/540)4 = 35*(1/3)4 = 35/81 = 0.432 µW

 Mar 3, 2020
 #2
avatar+22043 
+1

https://web2.0calc.com/questions/maths-question_22

 Mar 3, 2020

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