we are using the 5.8mhz unit from this company, includes a IR remote repeater (or you can use RF remotes).
http://www.nyrius.com/products/?category=21
We bring the Sat into the living room to the SD receiver, from there the 5.8mhz unit sends it to the bedroom. Works well, but it does not like people walking between the units, so it definiately is a line of sight unit.
We tried just running an RF connection out of the receiver and through the cable wiring plant, but the picture was not that great, this is much better.