# Statistical Models for Multipath Fading Channels

This set of Wireless & Mobile Communications test focuses on “Statistical Models for Multipath Fading Channels”.

1. Which of the following is not a statistical models for multipath fading channels?
a) Clarke’s model for flat fading
b) Saleh and Valenzuela indoor statistical model
c) Two ray Rayleigh fading model

2. Who presented the first statistical model for multipath fading channel?
a) Ossana
b) Rayleigh
c) Newton

3. Clarke’s model assumes a horizontal polarized antenna.
a) True
b) False

4. A wave that is incident on mobile does not undergo Doppler shift.
a) True
b) False

5. Which of the following is an important statistics of a Rayleigh fading useful for designing error control codes and diversity schemes?
a) Mobile speed
b) Doppler frequency
c) Level crossing rate (LCR)
d) Power density

6. The level crossing rate (LCR) is defined as expected rate at which _______ fading envelope crosses a specified level.
a) Rayleigh
b) Saleh
c) Vanezuela

7. Level crossing rate is a function of _______
a) Power transmitted by base station
c) Mobile speed
d) Bit error rate

8. Clarke’s model considers the multipath time delay.
a) True
b) False

9. Saleh and Venezuela reported the results of ______ propagation measurements.
a) Indoor
b) Outdoor
c) Air
d) High frequency

10. Saleh and Venezuela show that indoor channel is _______ time varying.
a) Not
b) Very slow
c) Fast
d) Very fast

11. What is the full form of SIRCIM?
a) Simulation of Indoor Radio Channel Impulse response Model
b) Statistical Indoor Radio Channel for Impulse Model
c) Statistical Impulse Radio Channel for Indoor Model
d) Simulation of Impulse Radio Channel for Indoor Model