Question

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

I have been asked this question during an interview.

My query is from Statistical Models for Multipath Fading Channels topic in chapter Mobile Radio Propagation: Small – Scale Fading and Multipath of Wireless/Mobile

Answer 1

Right answer is (c) Level crossing rate (LCR)

For explanation I would say: The level crossing rate (LCR) and average fade duration of a Rayleigh fading signal are important statistics. They are useful for designing error control codes and diversity schemes to be used in mobile communication.