Instructions
Check your Internet connection to ensure it is working properly. Write down your network name and passkey if you have one.
Boot up your PS3 system.
Select "Settings" from the homescreen, and then "Network Settings."
Choose "Internet Connection Settings."
Choose "Easy" when asked which setup process you want to take.
Select "Wireless" from the next screen.
Select "Scan" to search for wireless networks within range of the PS3. A list of networks will appear on the screen when the scan is complete.
Choose your wireless network.
Select the network security that is being used, if any, and enter the passkey.
Save the settings.
Test the connection by selecting "Test Connection" under "Network Settings."