742 CHAPTER 12: Applications of Discrete-Time Signals and Systems
12.5 What Have We Accomplished? Where Do We Go from Here?....................
In this chapter we have seen how the theoretical results presented in the third part of the book relate
to digital signal processing, digital control, and digital communications. The Fast Fourier Transform
made possible the establishment and significant growth of digital signal processing as a technical
area. The next step for you could be to get into more depth in the theory and applications of digital
signal processing, preferably including some theory of random variables and processes, toward statis-
tical signal processing, speech, and image processing. We have shown you also the connection of the
discrete-time signals and systems with digital control and communications. Deeper understanding of
these areas would be an interesting next step. You have come a long way, but there is more to learn.