This lecture starts with applying FFT for a finite duration and the difference between DTFT and DTFS. The remainder of the lecture covers the demodulation frequency diagram, correcting error in demodulation and phase ambiguity, and multiple trasnmitters.
An introduction to several fundamental ideas in electrical engineering and computer science, using digital communication systems as the vehicle. The three parts of the course—bits, signals, and packets—cover three corresponding layers of abstraction that form the basis of communication systems like the Internet.
The course, taught by Prof. George Verghese, teaches ideas that are useful in other parts of EECS: abstraction, probabilistic analysis, superposition, time and frequency-domain representations, system design principles and trade-offs, and centralized and distributed algorithms. The course emphasizes connections between theoretical concepts and practice using programming tasks and some experiments with real-world communication channels.