433Mhz remote control circuit help

Hi,

I have to develop a wireless remote control on 433Mhz. There are some mechanical requirements regarding the dimensions of the PCB, it should be similar with a car remote door opener.
The power supply is a coin battery of 3V, type CR2032. It has 3 buttons with which it can control 3 functions. At the moment I have experience just in PIC microcontrollers.

Could you help me please with some examples of remote control circuits?

Thank you in advance.

Look at
CC1101 and his example
http://www.ebay.com/itm/CC1101-Wirel...item1c3868d791
or finished module
http://www.ebay.com/itm/433MHz-4-Cha...item2ec9f7e36f