Feedback

Study materials for Decision feedback equalizer

Study materials for Decision feedback equalizer
  1. What is decision feedback equalizer?
  2. What difference makes decision feedback equalizer DFE superior to linear equalizer?
  3. 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.

Offset Sampling Time Offset estimation for OFDM signal
Sampling Time Offset estimation for OFDM signal
What is sampling clock offset?What causes frequency offset in OFDM?What is the main objective of time synchronization for OFDM?What is timing offset ...
Probability Why is a random process strictly stationary when its joint Probability density function is time invariant?
Why is a random process strictly stationary when its joint Probability density function is time invariant?
How do you know if a stochastic process is stationary?Why is joint probability density function useful?Do probability density functions have to be co...
Lock-in What advantage do lock-in amplifiers give over doing an FFT and looking at the frequency spectrum?
What advantage do lock-in amplifiers give over doing an FFT and looking at the frequency spectrum?
What is the purpose of lock-in amplifier?How does lock-in detection work?What is the purpose for dual phase lock-in amplifier? What is the purpose o...