Usually reflected tv signals are something to avoid , however of your situation , a reflected tv signal is your best friend. If you have a balcony , Put a Winegard HD7210P antenna on the balcony and aim the HD7210P at other buildings in your area. The idea is get a high quality/stable reflected signal off of an other buildings. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. Open the balcony door and run a coax to the tv. If successful of reception , A flat cable can be used at a door or window , A , fc-300lx flat cable.