Boosting wireless internet signal for PS3

Hello,
I live in an apartment complex that provides wireless internet via Linksys wireless router. I just recently purchased a Playstation 3 that uses wireless. My connection speed is at 30% because the walls are brick and the signal just doesn't come through all that great. Is there any kind of wireless internet receiver or something that is made for PS3 that will pull in that wireless internet signal stronger so that I will have a better internet strength? I am looking for something that I can either plug in to the PS3 or something I can set up in my apartment without having to connect directly to the wireless router itself.

Any advice/help is appreciated! Thanks a lot!

Brandon