need some ideas... about final project

hi friends.... i need some ideas.... about a final project on RF.... i want to do it individually.... so kindly suggest me the topics... or projects.... so i may proceed to next level.. that is searching the material....

I think MIMO is a hot and interesting research area

ZigBee - 802.15.4
Build a transceiver from discrete components on 2.4GHz ( PCB antenna included ).
That it will bring you a lot of money later ...
HS

Build high linear active filter for 2.4GHz frontend

multi carrier communication and OFDM is very good new resarch topic

RFID! RFID! RFID!