I used to read about Time domain equalizer (TEQ) in many lectures, i.e here , But in many other papers, that's called Channel shortening i.e here .
However, in the a two above links, the cost functions is almost similar, but in first paper it's called Time domain equalizer, and in the second, it's channel shortening.
What's the difference between them (I mean between Time domain equalizer TEQ and Channel Shortening)? And why do we call it sometimes TEQ and another time channel shortening?
Thank you.