Can I amplify keyfob signal?

[Freeman]

Since Christmas, I've had an electric key fob. I use it daily to lock/unlock the vehicle just like everyone else. It was bought from the dealership and is, thankfully, one of the newer models. Looks the same on the outside but not on the inside.

Anyway, on to the point. From what I've noticed so far, if I'm turned a certain way, if I'm not aiming at the car sometimes, or if I'm more than three car lengths away, my keyless entry will not engage. I can't lock or unlock.. Also, sometimes, when there is a car between me and my car and I try to unlock, the signal seems like it's blocked! Is there any way I can amplify the signal from the key fob or from inside the car without compromising the system? I'd love to be able to set off my alarm from more than 6 feet away sometimes..

Thanks for the assistance in advance!