Decision-Feedback Equalization: Equalization can be performed in the receiver without requiring…

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Decision-Feedback Equalization: Equalization can be performed in the receiver without requiring additional detection resolution by subtracting the low-frequency components of past bits from the received signal. Compared with transmitter pre-emphasis, this decision-feedback equalization (DFE) has the advantage that no communication between the receiver and transmitter is required to train the equalizer on a test signal. A block diagram of a signaling system using DFE is shown in Figure 8-36. If the transfer function of the lossy transmission line is H(s), what feedback transfer function, G(s), should be employed to equalize the line? Can DFE be employed with receivers that are heavily pipelined or multiplexed (i.e., where it takes many bit times from the time the bit is on the line to when it is available at the output of the detector)? Why or why not?