Emulate or Amplify RFID Proximity Card SIgnal


I want to know if there is any open source code that is available to boost proximity card signal.

I have the card and the reader is in my office. I would just like something to boost the signal of the card from within my car so the reader can read the card (atleast about 1.5 feet away). Right now it needs to be as close as about 10-15 cm before it works. What are the components that I am gonna need? I would appreciate some ideas even if there isnt any open source code available.

Edit: Even if it can't amplify the signal.. it would be good if it can act as the transceiver emulating the RFID but with a greater signal.