Can't you get the cable under the edge of the carpet? assuming you don't have a wooden floor.
As a matter of interest we had Sky+ installed a year or so ago and it was installed while I was out, the wife "supervised". I couldn't believe what she had let him do. He said they weren't allowed to drill though customers internal walls due to complaints of damaging decorations. Instead he had drilled into the end of our lounge and run a black cable around the top of the skirting board and around two door frames. It looked a right mess. In addition, the hole he'd drilled from the inside to the outside knocked off a patch of rendering which I had to repair after ripping out the cable and re-running it through the garage and into the lounge. I still have more than half the cable he used which was left over.
A complaint to Sky resulted in "Our policy........blah, blah