please help,, i get stuck in design OQPSK modulator,, :(

need help to master here..

(if u have journal, please i need)


sorry if my language not perfect.. (indonesia)


i get stuck to my last project..
i asked to design GMSK modulator.

GMSK = Gaussian filter + MSK modulation.. but in this case, i should use OQPSK to change the MSK..

the GMSK modulator general specification:

IF = 70 MHz
bit rate = 270 kbps

the problem: what more spesification shoul i add ? and, how much frequncy carrier should i use ?

how to design that modulator ? anybody get advice ? or maybe have block diagram ? i get confuse with block diagram that i searched in google..

then, what component / IC should i use for do that modulator project ? can i use IC MAX 2450 ? the MAX 2450 said : Modulator Input Bandwidth Up to 15MHz.. what bandwidt here mean ?


what i know (on my mind):

the input is signal NRZ, then the signal splited to I (in phase) and Q (quadratur).. then modulation..



thanks before,,

regards


my email: adimulyadi9990@gmail.com