Digital Communication By Taub And Schilling Pdf 31
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Digital computers (also called digital electronic computers) are electronic devices which can perform digital calculations by using a sequence of electrical pulses, called binary digits, or bits. Each bit can be only \"0\" or \"1\" and the number of the bits available is determined by the system. For example, a computer with 2 bits will have 4 possible combinations of 1.0 and 0.0.
The receiver attempts to equalize the signal so that it goes back to its most likely original state. In a wire-line environment, the transmission medium (copper wire) offers some amount of resistance to the propagation of the signal. Consequently, the receiver stage has a series resistance and a parallel resistance, with the resistances usually being large compared to the capacitances and inductances. Therefore, communication over distances longer than the values of the resistances are often degraded by clipping due to resistance dominated attenuation.
In this chapter, we will review the theory of, and methods for applying, equalization. In the following sections, we will first discuss the impact of the conversion of a signal from the base band to the RF domain. We will then turn to the discussion of the techniques used in existing communications systems. After that, we briefly discuss the implementation of adaptive equalization in digital communications.
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