A path loss model is given by the following

Question

Problem-1 Path Loss Model

a.) A path loss model is given by the following equation

PL(d)= - n_m 10*log₁₀ (d/d_m)+PL(d_m),  m=1,2,3, d_m m+1 

Find the slopes n_m and break points d_m, m=1,2,3 from the following graph.

b.) If the radio transmitter with power 10W is employed at a base station and the minimum required received power of a cell phone is 10-7W, what is the cell radius?

c.) If the maximum transmitter power of the cell phone is 10mW and maximum distance between the cell phone and the base station is 4000m, what is the minimum required received power at the base station?