Howtosignalprocessing
- What is decision feedback equalizer?
- What difference makes decision feedback equalizer DFE superior to linear equalizer?
- What is feed forward equalizer?
What is decision feedback equalizer?
The Decision Feedback Equalizer (DFE) is a form of non-linear equalization which relies on decisions about the levels of previous symbols (high/low) to correct the current symbol. This allows the DFE to account for distortion in the current symbol that is caused by the previous symbols.
What difference makes decision feedback equalizer DFE superior to linear equalizer?
Decision directed equalizer (DDE) is a linear equalizer and Decision feedback equalizer (DFE) is a non-linear one. DFE checks its quantisation error in each step of iteration and hence minimises that by a feedback method. So, DFE is a bit slower than DDE, but DFE can reconstruct the message signal more accurately.
What is feed forward equalizer?
A feed-forward equalization (FFE) circuit is a transversal filter that may be employed in multi-gigabit/s serial link transceivers to compensate for the frequency dependent loss of communication channels.
