Question

3. (20 points) The local spatial average of a power delay profile is shown in the following figure. We assume that the coherence bandwidth is approximated by B and the coherence time is estimated using the popular rule of thumb for modern digital communications. Pr(r) -10 dBm -20 dBm -30 dBm 0 5 10 excess delay r rs) If a baseband message with a bit rate R, 400 kbps is modulated by an RF carrier frequency of 5.8 GHz and the mobile is traveling at 30 miles per hour. a) Which type of small-scale fading is the above channel if 256-QAM modulation is used? How many bits are sent while the channel appears "static"? b) Please show your detailed calculations to justify your answer

Answer 1

너.valhal.-The- "spal:ol local ava lod cx.es dala fva Small - S Modulal.onis uod Ж-фл,и abova. Chan nel i1 -f UCL더 CS Scanned with

O. 5112 13.33 25チ.13ト丨关 From abova slalic a Sant l Chane/ afpax 4lalim Chin 256 Scanned with CSI