How do I get my sister to stop keeping me up at night?

My sister likes to smoke on the balcony from about 11pm to 2 am. She coughs and clears her throat so loud that I can't sleep. I have to sleep in the living room right in front of the window where the balcony is. Me, my father and sister live in small condo, so I have no where else to sleep. I constantly wake up tired in the morning with a headache due to lack of sleep. Sleeping in late doesn't help me. Only sleeping at night makes me feel well the next day. So I have to be able to sleep at night. Also lack of sleep makes my tics worse because I have tardive dyskinesia. Due to my condition I have to have it quite so I can relax otherwise I can't fall asleep.My father is too much of a wuss to tell her no and stand up for me. She is extremely selfish so she only cares about her self. She doesn't care that it makes me feel like crap. This has been going on since January and I am losing it. This really needs to stop. She is 23 years old and I am 27.

My father has offered to have me sleep in his room but he snores really loud so that won't be any better. I have 2

bigfanss on the loadest setting because the sound is relaxing but unfortunately i can still hear her through the fans. Even if I listen to music with headphones I can still hear her. music doesn't help me sleep this is just to show how bad it is. I need her to stop going on the balcony at night. Is there any legal action that can be taken against her? What can I do to stop her?