Assignment:
A signal within a mobile wireless system undergoes time spreading. The symbol rate = 20 k symbols/sec. Channel measurements indicate that the mean excess delay is 10 us, while the second moment of the excess delay is 1.8 x 10-10 s2.
(a) Calculate the coherence bandwidth, f, if it is defined as the frequency interval over which the channel's complex frequency transfer function has a correlation of at least 0.9.
(b) Repeat part a) if f0 is defined for a bandwidth interval having a correlation of at least 0.5.
(c) Determine whether the signaling will undergo frequency-selective fading.
Provide complete and step by step solution for the question and show calculations and use formulas.