hi zulkarnain,,,,,,
you may please refer through the links provided………there is a good comparison between the modulation techniques provided….
http://www.cpeu.dk/data/uploads/teaching/34129_e2009_cpeu_dml_eml.pdf
http://www.dli.gov.in/data_copy/upload/INSA/INSA_2/20005ad1_228.pdf
hope it helps you to get the clear idea for your project requirements…
with regards