Homework 8 (Due: April 15)

[PDF]

Reading

Chapters 4 and 7 in Forouzan; review class notes.

Problems

1. Problem 4.12
2. Problem 4.18
3. Problem 7.13
4. Problem 7.16
5. Link Budget
   A wireless communication system’s transmitted signals are attenuated according to the following path loss model:

   where d denotes the distance between transmitter and receiver in meters and the carrier frequency f = 1 GHz. Further, the system is characterized by

   • thermal noise PSD N₀ = -174 dBm/Hz,
   • signal bandwidth B = 1 MHz,
   • required SNR = 10 dB.
   1. Assuming the transmitter power equals 1 Watt, what is the transmission range d?
   2. How much transmit power is required to communicate over a distance of 2 km.
   3. For a given transmit power, by how much does the range increase if the bandwidth B is reduced to 100 KHz?