What's the difference between Channel shortening and time-domain equalizer I'm asking about the difference about channel shortening and time-domain equalization. I have checked on-line and tried to get something clear but I couldn't. 

What I found is that channel shortening means almost  "Calculating the coefficients for DFE equalizer" But I couldn't also imagine that. 

Could you please explain. 

Thank you
Yes,I agreed these terms are very common in communication engineering,

I was asking about channel shortening long time ago, and I got an answer telling me that channel shortening is just calculating the coefficients of the DFE. you can read the details in the below link

Channel Shortening for underwater acoustic channel communication 

thanks