Practical Applications in Digital Signal Processing

Chapter One. Review of Digital Frequency

It is easy to mathematically represent an analog frequency on paper. The range of frequencies in the analog domain is both continuous and theoretically infinite. If we use the symbol f_O to represent some arbitrary analog frequency all we need to do is to equate it with any one of an infinite number of available frequencies. We could, for example, choose f_O to be equal to 23.456 Hz, or we could just as easily choose f_O to be equal to 1.005 MHz. We could choose just about any other value to any precision that we can dream up. As long as we remain realistic, there is no limit on the values that f_O can take ...