Ps3 connection problems

ok, i have been playing online on my ps3 since i first got it (via wireless connection) it always used to wobble between 80%85% conecction status but for the last like three weeks it wont get any better then 40% its really starting to get on my nerves it wont GO ANY HIGHER!!!( my router is fine its quite new and is pretty fast ) please help me i can bareley go online without lagging like crazy or getting signed out because of lost connection, and i barely squeaked by the last update, Thanks (hope you can help)

Is your WiFi connection secure? If not there could be others in your neighborhood stealing your bandwidth - that could explain why.

Also - if it is a cable modem - what times are you playing at? Cable internet (while the fastest) do loose bandwidth if there are others in your area actually watching their cable TVs. If you are playing at peak watching times you could see a dip in signal as well.

Those are my suggestions of what to look for.