One of the questions I get asked most frequently is how I hung the canopy in my bedroom. I'm going to try my best to explain how I did it. I will admit it's a little ghetto, but it works and has held up for a few years now. On a side note, looking at this picture makes me realize I need to update my home tour, I'll work on updating that soon.
I started with four curtain panels (2 pairs) from IKEA. I believe I used the Ritva.
Then, I purchased two basic curtain rods, also from IKEA. You really aren't going to see these so you can go with something pretty inexpensive and plain, like this one from IKEA as well.
Now, you will need to sew an additional rod pocket on the curtain panel so that it will not move. A picture is worth a thousand words, so here's a little diagram.
Then, you will thread your two rods through the two pockets.
Now, here's how I mounted the rods. Mount one to the wall just like you normally would if you were going to hang curtains.
and this is where it gets a little ghetto, rigged up, whatever you want to call it, if you have a better method by all means go with it, this has held up for a few years for us and is still going strong but I don't want to be blamed for any curtain rods falling on anyone ;)
I mounted a hook to the ceiling, making sure it was anchored well. Then I used picture hanging wire to attach the rod to the hook. I wrapped it around several times and tied several knots in it to make sure it was secure. I could have used the same mounting hardware that I mounted to the wall, but the gap between the ceiling and the curtain was larger than I would have liked. If you are ok with the way that looks, that method would work too. Also, I should mention that the curtain covers the wire and hook so you don't see it.