U-verse Freezing & Losing Signal - DirecTV

Our TV in the master bedroom freezes and loses signal A LOT, sometimes every couple of minutes. We're constantly having to change the channel and change it back real quick each time. I've also noticed it takes longer to load the picture when we do this now - whenever we go from one channel to the next it shows a black screen for a couple seconds before loading the channel. Is anyone else experiencing this and have you found a fix for it? I've read in a couple places it could be that the TV is connected with a wireless receiver.

This question, "U-verse Freezing & Losing Signal," is about DirecTV channels, programming, equipment, and sports.