Dear Prarthana,
you can go for adopting advanced modulation schemes such as QAM, DQPSK. I am also working on the same kind of projects. In contrast to mm-wave signal transmission over fiber, the effect of fiber chromatic dispersion on the distribution of lower frequency intermediate frequency (IF) signals is less severe and the signals can be transmitted over longer fiber distances. This is also true for fiber transmission of digital baseband data signals where chromatic dispersion has a minimal effect on the delivery of few gigabits per second data streams over fiber links less than 100 km in length. In addition, both IF and baseband over fiber techniques have the advantage that they can exploit the use of mature microwave and digital hardware at the remote base station.
This will be much helpful in case of full duplex design.
Regards