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Unformatted text preview: ussian noise Figure 4.10: Equivalent communication system with colored Gaussian noise 4.3.1 Equivalent discrete-time model
Our goal is to design the equalizer which can remove (or suppress) ISI. To do so, we translate the
continuous-time communication system model in Figure 4.9 to an equivalent discrete-time model that
is easier to work with. The following steps describe the translation process: ¯ Instead of considering AWGN being added before the receiving ﬁlter ÀÊ ´ µ, we can consider an
equivalent colored Gaussian noise being added after ÀÊ ´ equivalent colored noise is the output of ÀÊ ´ µ when we analyze the system. The µ due to AWGN. The resulting model is shown in Figure 4.10. ¯ We input a bit or a symbol to the communication system every Ì seconds, and get back a sample
at the output of the sampler every Ì seconds. Therefore, we can represent the communication
system in Figure 4.10 from the information source to the sampler as a digital ﬁlter. Since ÀÌ ´ µ, À ´...
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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