TI (20p) El (15p) T2 (20p) E2 15p) Synchronous and asynchronous transmission (presentation, comparison). Considering a baseband signal with the bandwidth between 210 kHz and 3970 kHz modulating the amplitude of a 54 MHz sine carrier, determine the frequency range of the resulted amplitude modulated (AM) signal. Polynomial block codes for data communications (principle, polynomial description). What is the ratio between the data rates (D/D2) of two transmitted signals occupying the same bandwidth, but different number of levels, i.e., M = 8 and M = 32, using Raised Cosine characteristics with the roll-off factors a = 0.5 and a2 = 0.25, 0.5 and a2 = 0.25, respectively?