Name______________________________________________________Problem-1 Path Loss Modela.) A path loss...

Question

Name______________________________________________________
Problem-1 Path Loss Model
a.) A path loss model is given by the following equation
PL(d)= - nm 10*log10 (d/dm)+PL(dm), m=1,2,3,
dm Find the slopes nm and
eak points dm, m=1,2,3 from the following graph.
.) 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?
Ans:
This is the solution that were explained in a video by the instructor.. this is the screen shots.. It’s not really clear but I will write the explanation as I listen to the video and send it soon to help reading the unclear part..
thank you..
x=10logd
PL
30
35
25
38
-30dB
-45dB
-65dB
-83dB

005_i92vapo-roa4235p.doc

David · Accepted Answer

Sol: (1) (a) Given that, 
                                     
10log
10x
x d
d


, 
            Breakpoints:
2.5
1
3
2
3.5
3
3.8
1
10 316.2 
10 1000 
10 3162.3 
10 6309.6 
d m
d m
d m
d m
 
 
 
 
 
                Slope:
 
 
 
 
 
 
1
1
1
45 30 15
3
30 25 5
65 45 20
4
35 30 5
83 65 18
6
38 35 3
n
n
n

  


  


  


(b)  Maximum path loss,

Name______________________________________________________ Problem-1 Path Loss Model a.) A path loss model is given by the following equation PL(d)= - nm 10*log10 (d/dm)+PL(dm), m=1,2,3, dm

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