If you use an indoor aerial then you cannot guarantee what kind of reception you will get. The signal strength will vary depending on whether someone walks in front of the aerial, whether the cat does his business over it, it's open to all sorts of trouble. Have a chat with some of your neighbours to see what sort of reception they get. If they can receive a GOOD analogue signal from a small aerial then it looks promising. Perhaps it would be possible to fit an external aerial to a bracket outside a bedroom window ??? Good luck.