Help me about frequency shift keying/ amplitude shift keying

hi everyone,
am a new in communication systems
i have been given a task to design ask or fsk communicaation.

i want to do fsk/ask with frequency range of 100-250 MHz (because of antenna size becomes too large for low frequencies)

tell me all the very common integrated chips u know that cn act as transmitter/reciever/encoder/decoder ics....

please list as much ics as u can as i live in pakistan. So there is little chance of getting uncommon ics.