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Unformatted text preview: the bandlimited channel for which the ´Øµ is that of an ideal lowpass ﬁlter. This lowpass ﬁltering smears the transmitted signal in time causing the effect of a symbol to spread to adjacent symbols when a sequence
of symbols are transmitted. The resulting interference, intersymbol interference (ISI), degrades the
error performance of the communication system. There are two major ways to mitigate the detrimental
effect of ISI. The ﬁrst method is to design bandlimited transmission pulses which minimize the the
1 For simplicity, all the signals considered in this chapter are real baseband signals. All the developments here can, of course, be generalized to bandpass signals using either the real bandpass representation or the complex baseband representation. 4.1 Wong & Lok: Theory of Digital Communications 4. ISI & Equalization effect of ISI. We will describe such a design for the simple case of bandlimited channels. The ISIfree pulses obtained are called the Nyquist pulses. The second method is t...
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This note was uploaded on 12/13/2012 for the course EEL 6535 taught by Professor Shea during the Spring '08 term at University of Florida.
- Spring '08