How do I get my PS3 to pick up more/better wifi internet OR have it pick up my desktops internet? Internet is from moms.

How do I get my playstation PS3 to pick up my desktop internet, that I get via my moms place down the street?
I get my desktop internet connection via a engenius bridge and large antenna from my moms place down the street.
I just got a PS3 and the built in wifi thats built in cant pick it up the signal cause her place is too far away. Is there a way that I can get the PS3 to pick up a signal from my desktop, even though my desktop internet comes from someone else??