By James D. Broesch
James D. Broesch is a employees engineer for common Atomics, the place he's chargeable for the layout and improvement of numerous complicated keep an eye on structures used on fusion keep watch over courses. He additionally teaches sessions in sign processing and layout on the collage of California-San Diego. Г‚В·
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Additional resources for Digital Signal Processing Demystified
Digital Signal Processing This fact has some interesting implications. Future generations will never really know what the Beatles sounded like, for example. The commercial analog technology of the 1960s was simply not able to accurately record and reproduce the signals. Several generations of analog signals were needed to reproduce the sound: First, a master tape would be recorded, and then mixed and edited; from this, a metal master record would be produced, from which would come a plastic impression.
When received, the numbers are decrypted and then reproduced as the original signal. Modern "secure telephone" DSP systems allow this processing to be done with no detectable effect on the conversation. Chapter Summary Digitally processing a signal allows us to do things with signals that would be difficult, or impossible, with analog approaches. With modern components and techniques, these advantages can often be realized economically and efficiently. This Page Intentionally Left Blank HAPTE R y The General Model of a DSP System Introduction The general model for a DSP system is shown in Figure 2-1.
The angle 9 is obtained from x and }> as follows: Equation 3-19 Two particularly interesting relationships are: X = I r I cos e Equation 3-20 and ^^ = I r I s i n 9 Equation 3-21 The reason these two functions are so important is that they represent the signals we are usually interested in. In order to develop this statement further, it is necessary to realize that the system we have just described is static—in other words, the wheel is not spinning. In DSP, as with most other things, the more interesting situation occurs when the wheels start spinning.
Digital Signal Processing Demystified by James D. Broesch