Signals & Systems 2nd Edition This comprehensive exploration of signals and systems develops continuous- time and discrete-time concepts/methods in parallel - highlighting the similarities and differences - and features introductory treatments of the applications of these basic methods in such areas as filtering, communication, sampling, discrete-time processing of continuous-time signals, and feedback. Relatively self-contained, the book assumes no prior experience with system analysis, convolution, Fourier analysis, or Laplace and z-transforms.