PPT Slide
? ??Techniques like ASK, PSK, FSK are better than baseband transmission because they use a wider frequency spectrum.
They use a narrower frequency spectrum
????Dispersion’s primary effect is to dampen signal amplitudes
Dispersion widens signals - causes inter-symbol interference. Attenuation dampens signals
????All-zeros is a valid set of CRC-bits (i.e the bits which are finally added to form T(x)), but 0 is not a valid check-digit in the check-digit method.
You have a “subtract” step in decimal check-digit. The only way to get 0 = 9-9, but 9 can never be the remainder !
? ??On a channel having bandwidth 10 MHz and S/N of 30dB, we can achieve a gigabit (109 bits/s) rate.
No. From Shannon’s theorem max = 10 MHz * 10 = 100 Mbps